nbtoolbox-help — Write to this list for help

[NBThelp] question about coherence

[hossein a. <hos...@ya...>]

Hello
First of all ,thank you for NBT toolboxi want to compare Coherence in 2 group with NBT, i do every thing ok before statical test,which statical test is suitable for  coherence , i have 10 subject in 2 groups (normal and MDD) ,60 channel eeg, 

thanks alot best regardHossein aghaie

[NBThelp] problems about DFA calculation

[姜时泽 <jia...@gm...>]

Dear NBT experts,
I am starting to analyze some EEG data with NBT toolbox following tutorials
on the web.
Below is the input for calculating DFA an it always come with an error when
I perform nbt_doDFA. The error message is attached in the end. Can you help
me to figure out what was wrong with this? Many thanks.


[Signal,SignalInfo,SignalPath] = nbt_EEGlab2NBTsignal(EEG,0);
[AmplitudeEnvelope, AmplitudeEnvelopeInfo] =
nbt_GetAmplitudeEnvelope(Signaldata, SignalInfo, 1, 40, 2/1);
[DFAobject, DFA_exp] = nbt_doDFA(AmplitudeEnvelope, AmplitudeEnvelopeInfo,
[4 30], [0.5 300], 0.5, 0, 60, []);


below is the matlab error

Warning: NARGCHK will be removed in a future release. Use NARGINCHK or
NARGOUTCHK instead.
> In nbt_CreateInfoObject (line 40)
  In nbt_EEGlab2NBTsignal (line 57)
  In Loop_importEDF_RunDFA (line 75)
Creating Info object
Warning: NARGCHK will be removed in a future release. Use NARGINCHK or
NARGOUTCHK instead.
> In nbt_filter_fir (line 56)
  In nbt_GetAmplitudeEnvelope (line 60)
  In Loop_importEDF_RunDFA (line 82)
Error: File: nbt_GetVersion.m Line: 18 Column: 8
Arguments to IMPORT must either end with ".*" or else specify a fully
qualified class name:
"mperl.file.spec.rel2abs" fails this test.

Error in nbt_Biomarker (line 78)
            BiomarkerObject.NBTversion = nbt_GetVersion;
Error in nbt_DFA (line 60)
        function DFAobject= nbt_DFA(NumChannels)

Error in nbt_doDFA (line 69)
DFAobject = nbt_DFA(size(Signal,2));

Error in Loop_importEDF_RunDFA (line 84)
            [DFAobject, DFA_exp] = nbt_doDFA(AmplitudeEnvelope,
AmplitudeEnvelopeInfo, [4 30], [0.5 300], 0.5, 0,
            60, []);

Many thanks
Shize

-- 

Shize Jiang
Fudan University,
Department of neurosurgery, Huashan Hospital, Shanghai Medical College
Shanghai,200032,P.R.China
E-Mail: 132...@fu...

[NBThelp] Using NBT in mice

[Nollet, M. <m.n...@im...>]

Dear NBT Team,

I am a postdoctoral researcher working at Imperial College in London. I recently discovered the NBT and its possibilities are very interesting. I have the project of exploring EEG biomarkers in mice. As the NBT has apparently been designed for clinical research, I was wondering if it would also be adapted for murine preclinical research (basically on recordings containing only on EEG channel and one EMG channel). I didn't find papers using the NBT in rodents, or information about that, but perhaps I missed something...

I would really appreciate if you could tell me if using the NBT in mice is possible, and would make sense considering the number of EEG channel.

Thank you very much for your help.

Best regards,
Mathieu



Mathieu Nollet, PhD
Research Associate in Sleep and Neurodegeneration

Imperial College London<http://www.imperial.ac.uk/> | UK Dementia Research Institute<ukdri.ac.uk>
South Kensington Campus, London SW7 2AZ

[NBThelp] PLI analysis for different frequency bands

[Pietro C. <pie...@gm...>]

 I have a cleaned time series EEG signal that I want to input into NBT. I
want NBT to generate a PLI matrix for different frequency bands that I
define. How can I do this?

Kind Regards,

*Pietro Antonio Cicalese*
*Masters Student, Department of Biomedical Engineering*
*BS, Biomedical Engineering*

*UG, Department of BiologyUniversity of Houston*
(713)-689-4852
*President and Co-Founder*
The Global Humanitarian Student Initiative
*https://sites.google.com/view/ghsi <https://sites.google.com/view/ghsi>*

[NBThelp] DFA exponent in fNIRS signals

[<hui...@fo...>]

Hello everyone,
      I'm a PhD candidate in the School of Biological Sciences & Medical Engineering, Southeast University, Naning, China. My research interest is mainly focused on scale-free analysis of neural signals collected from young children with autism. 
   
      One of my research project is to investigate the scale-free features of fNIRS signals in children with autism. In the preprocessing of fNIRS signals, a commonly used procedure is performing a band-pass filtering (0.01 ~ 0.1 Hz), in order to suppress the typical noise components in fNIRS signals. It's known that filtering using FIR, would introduce correlation in the signal between the neighboring samples. Thus, if a 0.01 Hz high-pass filtering is conducted, the window sizes in DFA exponent estimation will be too large (i.e., at least 300 sec, when the filter order for the FIR filter is set to three cycles of 0.01 Hz). However, if this high-pass filtering is not performed, the fNIRS signals will contain the low-frequency drift, which is very common in fNIRS signals. The DFA exponent estimated may be distorted due to this noise component.


     In the data analysis, only a 0.1 Hz low-pass filtering is conducted. The low-frequency drift has been partly removed through ICA, although the ICA could not fully remove this artifact. This DFA exponents calculated in our study were larger than 1, mainly distributed among 1 and 1.5. This result was very weird, since as far as I know, for many kinds of physiological signals, the DFA exponent is larger than 0.5 and smaller than 1. Does this result suggest that the fNIRS signals are highly non-stationary?


    Could you give me some advice about the two questions above?
    Thank you!




    Huibin Jia
PhD candidate
School of Biological Sciences & Medical Engineering, Southeast University, Naning, China

[NBThelp] Problem computing oscillatory burst biomarkers using NBT

[Hell, F. <Fra...@me...>]

   ​


   Dear NBT staff,

   I have a problem computing the oscillatory burst biomarkers, e.g. life &
   waitingtime using the GUI of NBT. And there is no tutorial on using the
   algorithms  straight  from the command line. The respective m-files in
   Biomarkers/nbt_OscBursts​ are a bit cryptic.

   Matlab gives me the error:

   Which Signal do you want to use? (e.g., Signal, CLEANSignal, ICASignal)
   RawSignal
   test1.S1.2.1.mat
   Undefined function or variable 'nbt_doOscBursts_gui'.
   Error in nbt_NBTcompute (line 156)
                               NBTfunction_handle(double(Signal(:,:)),
                               SignalInfo,SaveDir);

   Error while evaluating Menu Callback.
   I have no problem loading the signal or visualizing it. Can u help me out
   here?
   Best, Franz

   **************************************************************************
   M.Sc., M.A., Franz Hell
   LMU Klinikum Grosshadern
   Neurologisches Forschungshaus
   Feodor-Lynen-Str. 19
   D-81377 München
   email:   Fra...@me...
   phone:   +(49)-176-22606515

[NBThelp] Problems with NBTpublic-NBTv0.5.5-public and MATLABR2016b

[Daniel M. <dma...@cb...>]

Hi everyone,

I'm a new engineer at the max planck institute for human cognitive and 
brain sciences and still a newbie in eeg signal processing. So it was 
recommended to me to make my first experiences with this topic using the 
nbt toolbox. I currently try to reproduce the NBT youtube tutorials and 
get stuck in "NBT course: Lesson 2 [Beta]: How to clean EEG" at minute 
20. At this position I've two problems, which maybe caused by my setup. 
(I'm using MATLABR2016b and NBTpublic-NBTv0.5.5-public)

The first one is connected with "Find & add bad channel to 
Info.BadChannels". If I follow the procedure as described, I get the 
same bad channels, but the wrong channels are marked red in the time 
line. I've found out that the result is inverted. Channel 129 instead of 
channel 1 is marked red, channel 122 instead of channel 8 is also marked 
red and so on.

While the first problem is only graphically, the second one leads me to 
a real problem. If I try to start"Pre-processing-Tools → ICA → Run ICA 
on good channels only" unsing 15 channels as described, I get the 
following error message in the command window:

------------------------------

EEG.data = nbt_filter_firHp(EEG.data,0.5,EEG.srate,4);

Attempting to convert data matrix to double precision for more accurate 
ICA results.
Error: File: runica.m Line: 1 Column: 1
Unexpected MATLAB operator.

Error in nbt_pop_runicaBadChannels (line 638)
             [EEG.icaweights,EEG.icasphere] = runica( tmpdata,
             'lrate', 0.001, 'interupt', 'off', g.options{:} );

Error in nbt_filterbeforeICA (line 101)
         EEG =
         nbt_pop_runicaBadChannels(EEG,'pca',nrpca,'extended',1);

Error while evaluating Menu Callback

------------------------------

So I'm currently not able to follow the tutorial furthermore.

I would be pleased and thankful for some advice.

Kind regards

Daniel

Re: [NBThelp] Is synchronization likelihood available in NBT?

[Simon-Shlomo P. <poi...@nb...>]

Dear Huibin Jia,

Sorry, Synchronisation likelihood is not part of the public NBT version.

Best regards,
Simon

--
Dr. Simon-Shlomo Poil
Co-founder / Chief Technology Officer

NBT Analytics BV
Amsterdam Health and Technology Center
Paasheuvelweg 25
1105BP Amsterdam
The Netherlands

Mobile number (Swiss): +41 (0)76 399 5809
Mobile number (Dutch): +31 (0) 62 030 7288
Skype: poil.simonshlomo
Website: https://www.nbt-analytics.com

<http://t.sidekickopen68.com/e1t/c/5/f18dQhb0S7lC8dDMPbW2n0x6l2B9nMJW7t5XZs8pTpQWW5vg0Pv3LyGy4W63RzZn56dwYVf8bJ-Sv02?t=http%3A%2F%2Fwww.nbt-analytics.com%2F&si=5709894936428544&pi=40d1bf91-2acd-4529-a0ce-fabfe0f85834>

2016-12-12 18:12 GMT+01:00 Alexander Cerquera <ale...@ua...
>:

> Hi Juibin,
>
> The only connectivity measures that I know in NBT are Coherence and Phase
> Locking Value, I'm not sure whether SL really is there...
>
> --
>
> Edwin Alexander Cerquera S. M. Eng. Ph.D. (Dr. rer. nat.)
> Associate Professor - IEEE Senior Member | ResearchGate profile
> <https://www.researchgate.net/profile/Alexander_Cerquera> |
> IEEE-Collabratec
> profile <https://ieee-collabratec.ieee.org/app/p/AlexanderCerquera>
> Faculty of Electronic and Biomedical Engineering - Complex Systems Research
> Group
> Universidad Antonio Nariño
>
> Carrera 3 Este No 47 A - 15, Bloque 4, Piso 1
> Bogota, Colombia,  Tel: (+57-1) 3400135
>
> 2016-12-10 21:53 GMT-05:00 Hui-bin Jia <hui...@fo...>:
>
> > Hi, everyone
> >     In the homepage of NBT, I found that the synchronization likelihood,
> > developed by Stam & van Dijk (2002), is available in NBT.
> > However, I cann't find any function in the current version of NBT which
> > can be used to compute the SL.
> > So my question is whether the SL is available in the NBT.
> > Thank you!
> >
> >
> > Best,
> > Huibin Jia
> > ------------------------------------------------------------
> > ------------------
> > Developer Access Program for Intel Xeon Phi Processors
> > Access to Intel Xeon Phi processor-based developer platforms.
> > With one year of Intel Parallel Studio XE.
> > Training and support from Colfax.
> > Order your platform today.http://sdm.link/xeonphi
> > _______________________________________________
> > The NBT help mailing list.
> >
> > Visit our webpage:
> > http://www.nbtwiki.net
> >
> > LinkedIn: http://l.nbtwiki.net/nbtlinkedin
> > Facebook: http://l.nbtwiki.net/nbtfacebook
> >
> > Do you need help with NBT?, see
> > http://l.nbtwiki.net/HRIMOF
> >
> > Get involved, see
> > http://l.nbtwiki.net/HRf5Ns
> >
> > To unsubscribe write a mail to nbtoolbox-help-request@lists.
> > sourceforge.net with 'unsubscribe' in the subject line (without ' ')
> > Or go to the mail-list administration page to unsubscribe:
> > https://lists.sourceforge.net/lists/listinfo/nbtoolbox-help
> >
> >
> >
> ------------------------------------------------------------
> ------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> _______________________________________________
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>
> Visit our webpage:
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>
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> Facebook: http://l.nbtwiki.net/nbtfacebook
>
> Do you need help with NBT?, see
> http://l.nbtwiki.net/HRIMOF
>
> Get involved, see
> http://l.nbtwiki.net/HRf5Ns
>
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-- 
NBT Analytics BV
http://www.nbt-analytics.com

IMPORTANT: This message and any attachments are intended for the individual 
or entity named above. It may contain confidential, proprietary or legally 
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notify the sender by replying to this message, and then delete it from your 
system. Thank you.

Re: [NBThelp] Is synchronization likelihood available in NBT?

[Alexander C. <ale...@ua...>]

Hi Juibin,

The only connectivity measures that I know in NBT are Coherence and Phase
Locking Value, I'm not sure whether SL really is there...

--

Edwin Alexander Cerquera S. M. Eng. Ph.D. (Dr. rer. nat.)
Associate Professor - IEEE Senior Member | ResearchGate profile
<https://www.researchgate.net/profile/Alexander_Cerquera> | IEEE-Collabratec
profile <https://ieee-collabratec.ieee.org/app/p/AlexanderCerquera>
Faculty of Electronic and Biomedical Engineering - Complex Systems Research
Group
Universidad Antonio Nariño

Carrera 3 Este No 47 A - 15, Bloque 4, Piso 1
Bogota, Colombia,  Tel: (+57-1) 3400135

2016-12-10 21:53 GMT-05:00 Hui-bin Jia <hui...@fo...>:

> Hi, everyone
>     In the homepage of NBT, I found that the synchronization likelihood,
> developed by Stam & van Dijk (2002), is available in NBT.
> However, I cann't find any function in the current version of NBT which
> can be used to compute the SL.
> So my question is whether the SL is available in the NBT.
> Thank you!
>
>
> Best,
> Huibin Jia
> ------------------------------------------------------------
> ------------------
> Developer Access Program for Intel Xeon Phi Processors
> Access to Intel Xeon Phi processor-based developer platforms.
> With one year of Intel Parallel Studio XE.
> Training and support from Colfax.
> Order your platform today.http://sdm.link/xeonphi
> _______________________________________________
> The NBT help mailing list.
>
> Visit our webpage:
> http://www.nbtwiki.net
>
> LinkedIn: http://l.nbtwiki.net/nbtlinkedin
> Facebook: http://l.nbtwiki.net/nbtfacebook
>
> Do you need help with NBT?, see
> http://l.nbtwiki.net/HRIMOF
>
> Get involved, see
> http://l.nbtwiki.net/HRf5Ns
>
> To unsubscribe write a mail to nbtoolbox-help-request@lists.
> sourceforge.net with 'unsubscribe' in the subject line (without ' ')
> Or go to the mail-list administration page to unsubscribe:
> https://lists.sourceforge.net/lists/listinfo/nbtoolbox-help
>
>
>

[NBThelp] Is synchronization likelihood available in NBT?

[Hui-b. J. <hui...@fo...>]

Hi, everyone
    In the homepage of NBT, I found that the synchronization likelihood, developed by Stam & van Dijk (2002), is available in NBT. 
However, I cann't find any function in the current version of NBT which can be used to compute the SL.
So my question is whether the SL is available in the NBT.
Thank you!


Best,
Huibin Jia

Re: [NBThelp] Help with DFA using NBT

[David Fernandez-F. <dfe...@me...>]

Hello!

Thank you for the information. I realized that the version of MATLAB that I was using had the EEGlab plugins installed on it, which were interfering with some of the NBT functions. I removed all the EEGlab folders/subfolders from the path and now everything is working. I appreciate everyone's help.

Thank You,
David FF

On Dec 01, 2016, at 12:17 PM, Simon-Shlomo Poil <poi...@nb...> wrote:

Dear David,

I assume you are running this
Fs = 300;
Signal = randn(20*60*Fs,1);
highpass = 8; % Highpass corner frequency.
lowpass = 13; % Lowpass corner frequency.
[Data_filtered] = nbt_filter_fir(Signal, highpass, lowpass, Fs, 2/8);

That should work without problems.

Best wishes,
Simon

--
Dr. Simon-Shlomo Poil
Co-founder / Chief Technology Officer

NBT Analytics BV
Amsterdam Health and Technology Center
Paasheuvelweg 25
1105BP Amsterdam
The Netherlands

Mobile number (Swiss): +41 (0)76 399 5809
Mobile number (Dutch): +31 (0) 62 030 7288
Skype: poil.simonshlomo
Website: https://www.nbt-analytics.com

<http://www.nbt-analytics.com/>

2016-11-30 22:22 GMT+01:00 Michael Melnychuk <mel...@gm...>:

'Firls' not girls....sry autocorrect

On Wednesday, November 30, 2016, Michael Melnychuk <mel...@gm...>
wrote:

> Hard to say without seeing the data but I would try removing the
transpose
> operator in girls at line 80 or something along those lines and go from
> there.
>
> On Wednesday, November 30, 2016, David Fernandez-Fidalgo <
> dfe...@me...
> <javascript:_e(%7B%7D,'cvml','dfe...@me...');>> wrote:
>
>> Hello:
>>
>> My name is David Fernandez-Fidalgo and I am a researcher at the National
>> Intrepid Center of Excellence (NICoE) at Walter Reed Naval Hospital in
>> Bethesda, MD. I have been trying to teach myself how to use NBT to
perform
>> DFA on MEG data and calculate the DFA exponent for various datasets. I
have
>> been using the information and examples on the wiki page (
>> https://www.nbtwiki.net/doku.php?id=tutorial:detrended_fluc
>> tuation_analysis_dfa#computing_dfa_using_nbt) to learn how to remove
>> artifacts from the signal and perform DFA. I keep running into an error
>> every time I try to use the "nbt_filter_fir" function to filter a
matrix of
>> random numbers "Fs = 300; Signal = randn(20*60*Fs,1);" from the example
>> provided in the wiki. The error I keep observing is:
>>
>> "??? Error using ==> mtimes
>> Inner matrix dimensions must agree.
>>
>> Error in ==> firls at 80
>> cos_ints = [omega; sin((1:N)' * omega)];
>>
>> Error in ==> fir1 at 98
>> hh = firls(L-1,ff,aa);
>>
>> Error in ==> nbt_filter_fir at 108
>> b = fir1(floor(fir_order*fs),[hp lp]/(fs/2));
>>
>> Error in ==> test at 14
>> [Data_filtered] = nbt_filter_fir(Signal, highpass, lowpass, Fs, 2/8);"
>>
>> Do you have any suggestions for how I can resolve this error and filter
>> the dataset?
>>
>> Thank You,
>> David FF
>> ------------------------------------------------------------
>> ------------------
>> _______________________________________________
>> The NBT help mailing list.
>>
>> Visit our webpage:
>> http://www.nbtwiki.net
>>
>> LinkedIn: http://l.nbtwiki.net/nbtlinkedin
>> Facebook: http://l.nbtwiki.net/nbtfacebook
>>
>> Do you need help with NBT?, see
>> http://l.nbtwiki.net/HRIMOF
>>
>> Get involved, see
>> http://l.nbtwiki.net/HRf5Ns
>>
>> To unsubscribe write a mail to nbtoolbox-help-request@lists.
>> sourceforge.net with 'unsubscribe' in the subject line (without ' ')
>> Or go to the mail-list administration page to unsubscribe:
>> https://lists.sourceforge.net/lists/listinfo/nbtoolbox-help
>>
>>
>>
------------------------------------------------------------
------------------
_______________________________________________
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Visit our webpage:
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LinkedIn: http://l.nbtwiki.net/nbtlinkedin
Facebook: http://l.nbtwiki.net/nbtfacebook

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Get involved, see
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Or go to the mail-list administration page to unsubscribe:
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-- 
NBT Analytics BV
http://www.nbt-analytics.com

IMPORTANT: This message and any attachments are intended for the individual 
or entity named above. It may contain confidential, proprietary or legally 
privileged information. No confidentiality or privilege is waived or lost 
by any mistransmission. If you are not the intended recipient, you must not 
read, copy, use or disclose this communication to others; also please 
notify the sender by replying to this message, and then delete it from your 
system. Thank you.

------------------------------------------------------------------------------
_______________________________________________
The NBT help mailing list.

Visit our webpage:
http://www.nbtwiki.net

LinkedIn: http://l.nbtwiki.net/nbtlinkedin
Facebook: http://l.nbtwiki.net/nbtfacebook

Do you need help with NBT?, see
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Get involved, see
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Re: [NBThelp] Help with DFA using NBT

[Simon-Shlomo P. <poi...@nb...>]

Dear David,

I assume you are running this
Fs = 300;
Signal = randn(20*60*Fs,1);
highpass = 8;        % Highpass corner frequency.
lowpass = 13;        % Lowpass corner frequency.
[Data_filtered] = nbt_filter_fir(Signal, highpass, lowpass, Fs, 2/8);

That should work without problems.

Best wishes,
Simon

--
Dr. Simon-Shlomo Poil
Co-founder / Chief Technology Officer

NBT Analytics BV
Amsterdam Health and Technology Center
Paasheuvelweg 25
1105BP Amsterdam
The Netherlands

Mobile number (Swiss): +41 (0)76 399 5809
Mobile number (Dutch): +31 (0) 62 030 7288
Skype: poil.simonshlomo
Website: https://www.nbt-analytics.com

<http://www.nbt-analytics.com/>

2016-11-30 22:22 GMT+01:00 Michael Melnychuk <mel...@gm...>:

> 'Firls' not girls....sry autocorrect
>
> On Wednesday, November 30, 2016, Michael Melnychuk <mel...@gm...>
> wrote:
>
> > Hard to say without seeing the data but I would try removing the
> transpose
> > operator in girls at line 80 or something along those lines and go from
> > there.
> >
> > On Wednesday, November 30, 2016, David Fernandez-Fidalgo <
> > dfe...@me...
> > <javascript:_e(%7B%7D,'cvml','dfe...@me...');>> wrote:
> >
> >> Hello:
> >>
> >> My name is David Fernandez-Fidalgo and I am a researcher at the National
> >> Intrepid Center of Excellence (NICoE) at Walter Reed Naval Hospital in
> >> Bethesda, MD. I have been trying to teach myself how to use NBT to
> perform
> >> DFA on MEG data and calculate the DFA exponent for various datasets. I
> have
> >> been using the information and examples on the wiki page (
> >> https://www.nbtwiki.net/doku.php?id=tutorial:detrended_fluc
> >> tuation_analysis_dfa#computing_dfa_using_nbt) to learn how to remove
> >> artifacts from the signal and perform DFA. I keep running into an error
> >> every time I try to use the "nbt_filter_fir" function to filter a
> matrix of
> >> random numbers "Fs = 300; Signal = randn(20*60*Fs,1);" from the example
> >> provided in the wiki. The error I keep observing is:
> >>
> >> "??? Error using ==> mtimes
> >> Inner matrix dimensions must agree.
> >>
> >> Error in ==> firls at 80
> >> cos_ints = [omega; sin((1:N)' * omega)];
> >>
> >> Error in ==> fir1 at 98
> >> hh = firls(L-1,ff,aa);
> >>
> >> Error in ==> nbt_filter_fir at 108
> >> b = fir1(floor(fir_order*fs),[hp lp]/(fs/2));
> >>
> >> Error in ==> test at 14
> >> [Data_filtered] = nbt_filter_fir(Signal, highpass, lowpass, Fs, 2/8);"
> >>
> >> Do you have any suggestions for how I can resolve this error and filter
> >> the dataset?
> >>
> >> Thank You,
> >> David FF
> >> ------------------------------------------------------------
> >> ------------------
> >> _______________________________________________
> >> The NBT help mailing list.
> >>
> >> Visit our webpage:
> >> http://www.nbtwiki.net
> >>
> >> LinkedIn: http://l.nbtwiki.net/nbtlinkedin
> >> Facebook: http://l.nbtwiki.net/nbtfacebook
> >>
> >> Do you need help with NBT?, see
> >> http://l.nbtwiki.net/HRIMOF
> >>
> >> Get involved, see
> >> http://l.nbtwiki.net/HRf5Ns
> >>
> >> To unsubscribe write a mail to nbtoolbox-help-request@lists.
> >> sourceforge.net with 'unsubscribe' in the subject line (without ' ')
> >> Or go to the mail-list administration page to unsubscribe:
> >> https://lists.sourceforge.net/lists/listinfo/nbtoolbox-help
> >>
> >>
> >>
> ------------------------------------------------------------
> ------------------
> _______________________________________________
> The NBT help mailing list.
>
> Visit our webpage:
> http://www.nbtwiki.net
>
> LinkedIn: http://l.nbtwiki.net/nbtlinkedin
> Facebook: http://l.nbtwiki.net/nbtfacebook
>
> Do you need help with NBT?, see
> http://l.nbtwiki.net/HRIMOF
>
> Get involved, see
> http://l.nbtwiki.net/HRf5Ns
>
> To unsubscribe write a mail to nbtoolbox-help-request@lists.
> sourceforge.net with 'unsubscribe' in the subject line (without ' ')
> Or go to the mail-list administration page to unsubscribe:
> https://lists.sourceforge.net/lists/listinfo/nbtoolbox-help
>
>
>

-- 
NBT Analytics BV
http://www.nbt-analytics.com

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system. Thank you.

Re: [NBThelp] Help with DFA using NBT

[Michael M. <mel...@gm...>]

'Firls' not girls....sry autocorrect

On Wednesday, November 30, 2016, Michael Melnychuk <mel...@gm...>
wrote:

> Hard to say without seeing the data but I would try removing the transpose
> operator in girls at line 80 or something along those lines and go from
> there.
>
> On Wednesday, November 30, 2016, David Fernandez-Fidalgo <
> dfe...@me...
> <javascript:_e(%7B%7D,'cvml','dfe...@me...');>> wrote:
>
>> Hello:
>>
>> My name is David Fernandez-Fidalgo and I am a researcher at the National
>> Intrepid Center of Excellence (NICoE) at Walter Reed Naval Hospital in
>> Bethesda, MD. I have been trying to teach myself how to use NBT to perform
>> DFA on MEG data and calculate the DFA exponent for various datasets. I have
>> been using the information and examples on the wiki page (
>> https://www.nbtwiki.net/doku.php?id=tutorial:detrended_fluc
>> tuation_analysis_dfa#computing_dfa_using_nbt) to learn how to remove
>> artifacts from the signal and perform DFA. I keep running into an error
>> every time I try to use the "nbt_filter_fir" function to filter a matrix of
>> random numbers "Fs = 300; Signal = randn(20*60*Fs,1);" from the example
>> provided in the wiki. The error I keep observing is:
>>
>> "??? Error using ==> mtimes
>> Inner matrix dimensions must agree.
>>
>> Error in ==> firls at 80
>> cos_ints = [omega; sin((1:N)' * omega)];
>>
>> Error in ==> fir1 at 98
>> hh = firls(L-1,ff,aa);
>>
>> Error in ==> nbt_filter_fir at 108
>> b = fir1(floor(fir_order*fs),[hp lp]/(fs/2));
>>
>> Error in ==> test at 14
>> [Data_filtered] = nbt_filter_fir(Signal, highpass, lowpass, Fs, 2/8);"
>>
>> Do you have any suggestions for how I can resolve this error and filter
>> the dataset?
>>
>> Thank You,
>> David FF
>> ------------------------------------------------------------
>> ------------------
>> _______________________________________________
>> The NBT help mailing list.
>>
>> Visit our webpage:
>> http://www.nbtwiki.net
>>
>> LinkedIn: http://l.nbtwiki.net/nbtlinkedin
>> Facebook: http://l.nbtwiki.net/nbtfacebook
>>
>> Do you need help with NBT?, see
>> http://l.nbtwiki.net/HRIMOF
>>
>> Get involved, see
>> http://l.nbtwiki.net/HRf5Ns
>>
>> To unsubscribe write a mail to nbtoolbox-help-request@lists.
>> sourceforge.net with 'unsubscribe' in the subject line (without ' ')
>> Or go to the mail-list administration page to unsubscribe:
>> https://lists.sourceforge.net/lists/listinfo/nbtoolbox-help
>>
>>
>>

Re: [NBThelp] Help with DFA using NBT

[Michael M. <mel...@gm...>]

Hard to say without seeing the data but I would try removing the transpose
operator in girls at line 80 or something along those lines and go from
there.

On Wednesday, November 30, 2016, David Fernandez-Fidalgo <
dfe...@me...> wrote:

> Hello:
>
> My name is David Fernandez-Fidalgo and I am a researcher at the National
> Intrepid Center of Excellence (NICoE) at Walter Reed Naval Hospital in
> Bethesda, MD. I have been trying to teach myself how to use NBT to perform
> DFA on MEG data and calculate the DFA exponent for various datasets. I have
> been using the information and examples on the wiki page (
> https://www.nbtwiki.net/doku.php?id=tutorial:detrended_
> fluctuation_analysis_dfa#computing_dfa_using_nbt) to learn how to remove
> artifacts from the signal and perform DFA. I keep running into an error
> every time I try to use the "nbt_filter_fir" function to filter a matrix of
> random numbers "Fs = 300; Signal = randn(20*60*Fs,1);" from the example
> provided in the wiki. The error I keep observing is:
>
> "??? Error using ==> mtimes
> Inner matrix dimensions must agree.
>
> Error in ==> firls at 80
> cos_ints = [omega; sin((1:N)' * omega)];
>
> Error in ==> fir1 at 98
> hh = firls(L-1,ff,aa);
>
> Error in ==> nbt_filter_fir at 108
> b = fir1(floor(fir_order*fs),[hp lp]/(fs/2));
>
> Error in ==> test at 14
> [Data_filtered] = nbt_filter_fir(Signal, highpass, lowpass, Fs, 2/8);"
>
> Do you have any suggestions for how I can resolve this error and filter
> the dataset?
>
> Thank You,
> David FF
> ------------------------------------------------------------
> ------------------
> _______________________________________________
> The NBT help mailing list.
>
> Visit our webpage:
> http://www.nbtwiki.net
>
> LinkedIn: http://l.nbtwiki.net/nbtlinkedin
> Facebook: http://l.nbtwiki.net/nbtfacebook
>
> Do you need help with NBT?, see
> http://l.nbtwiki.net/HRIMOF
>
> Get involved, see
> http://l.nbtwiki.net/HRf5Ns
>
> To unsubscribe write a mail to
> nbt...@li... <javascript:;> with
> 'unsubscribe' in the subject line (without ' ')
> Or go to the mail-list administration page to unsubscribe:
> https://lists.sourceforge.net/lists/listinfo/nbtoolbox-help
>
>
>

Re: [NBThelp] Help with DFA using NBT

[Alexander C. <ale...@ua...>]

Hi David,

You should try rather with real EEG data instead of random data. Are you
checking the plug-in of EEGLAB and the tool of ADJUST?

--

Edwin Alexander Cerquera S. M. Eng. Ph.D. (Dr. rer. nat.)
Associate Professor - IEEE Senior Member | ResearchGate profile
<https://www.researchgate.net/profile/Alexander_Cerquera> | IEEE-Collabratec
profile <https://ieee-collabratec.ieee.org/app/p/AlexanderCerquera>
Faculty of Electronic and Biomedical Engineering - Complex Systems Research
Group
Universidad Antonio Nariño

Carrera 3 Este No 47 A - 15, Bloque 4, Piso 1
Bogota, Colombia,  Tel: (+57-1) 3400135

2016-11-30 8:22 GMT-05:00 David Fernandez-Fidalgo <dfe...@me...>
:

> Hello:
>
> My name is David Fernandez-Fidalgo and I am a researcher at the National
> Intrepid Center of Excellence (NICoE) at Walter Reed Naval Hospital in
> Bethesda, MD. I have been trying to teach myself how to use NBT to perform
> DFA on MEG data and calculate the DFA exponent for various datasets. I have
> been using the information and examples on the wiki page (
> https://www.nbtwiki.net/doku.php?id=tutorial:detrended_
> fluctuation_analysis_dfa#computing_dfa_using_nbt) to learn how to remove
> artifacts from the signal and perform DFA. I keep running into an error
> every time I try to use the "nbt_filter_fir" function to filter a matrix of
> random numbers "Fs = 300; Signal = randn(20*60*Fs,1);" from the example
> provided in the wiki. The error I keep observing is:
>
> "??? Error using ==> mtimes
> Inner matrix dimensions must agree.
>
> Error in ==> firls at 80
> cos_ints = [omega; sin((1:N)' * omega)];
>
> Error in ==> fir1 at 98
> hh = firls(L-1,ff,aa);
>
> Error in ==> nbt_filter_fir at 108
> b = fir1(floor(fir_order*fs),[hp lp]/(fs/2));
>
> Error in ==> test at 14
> [Data_filtered] = nbt_filter_fir(Signal, highpass, lowpass, Fs, 2/8);"
>
> Do you have any suggestions for how I can resolve this error and filter
> the dataset?
>
> Thank You,
> David FF
> ------------------------------------------------------------
> ------------------
> _______________________________________________
> The NBT help mailing list.
>
> Visit our webpage:
> http://www.nbtwiki.net
>
> LinkedIn: http://l.nbtwiki.net/nbtlinkedin
> Facebook: http://l.nbtwiki.net/nbtfacebook
>
> Do you need help with NBT?, see
> http://l.nbtwiki.net/HRIMOF
>
> Get involved, see
> http://l.nbtwiki.net/HRf5Ns
>
> To unsubscribe write a mail to nbtoolbox-help-request@lists.
> sourceforge.net with 'unsubscribe' in the subject line (without ' ')
> Or go to the mail-list administration page to unsubscribe:
> https://lists.sourceforge.net/lists/listinfo/nbtoolbox-help
>
>
>

[NBThelp] Help with DFA using NBT

[David Fernandez-F. <dfe...@me...>]

Hello:

My name is David Fernandez-Fidalgo and I am a researcher at the National Intrepid Center of Excellence (NICoE) at Walter Reed Naval Hospital in Bethesda, MD. I have been trying to teach myself how to use NBT to perform DFA on MEG data and calculate the DFA exponent for various datasets. I have been using the information and examples on the wiki page (https://www.nbtwiki.net/doku.php?id=tutorial:detrended_fluctuation_analysis_dfa#computing_dfa_using_nbt) to learn how to remove artifacts from the signal and perform DFA. I keep running into an error every time I try to use the "nbt_filter_fir" function to filter a matrix of random numbers "Fs = 300; Signal = randn(20*60*Fs,1);" from the example provided in the wiki. The error I keep observing is:

"??? Error using ==> mtimes
Inner matrix dimensions must agree.

Error in ==> firls at 80
cos_ints = [omega; sin((1:N)' * omega)];

Error in ==> fir1 at 98
hh = firls(L-1,ff,aa);

Error in ==> nbt_filter_fir at 108
b = fir1(floor(fir_order*fs),[hp lp]/(fs/2));

Error in ==> test at 14
[Data_filtered] = nbt_filter_fir(Signal, highpass, lowpass, Fs, 2/8);"

Do you have any suggestions for how I can resolve this error and filter the dataset?

Thank You,
David FF

Re: [NBThelp] calculating the "power" in the classical frequency band by the help of NBT

[valerio j. <val...@gm...>]

Hi Nastassja,

Please see the answer below.


Hi Valerio,
>
> I was reviewing your question about the nbt_doPower function usage and I
> just would like to confirm: does the 'ans' variable really return the
> absolute power for all channels in a .mat file loaded in NBT? In this way,
> it would mean that I can copy and paste these values to an Excel
> spreadsheet to do other statistical analysis, correct? And do you know if I
> could not include the first second of the .mat file in this analysis?
>
>
In fact, the nbt_doPower function able to generate an absolute power for
all the channels, but you need to make sure that your dataset is already
converted into NBT format (at the very early stage). The nbt_doPower
function produces a sheet that you can copy/paste it into, e.g., Excel
sheet, and perform further analysis.


Cheers,
Valerio

Re: [NBThelp] how much data for DFA

[Raquel L. <Raq...@UG...>]

Hi Alexander and Simon,

Thank you very much for your answers. I was looking at the page you sent me, and I have a couple of questions:

- About removing artifacts: when you stitch together the data afterwards; do the jumps from one segment to the next not introduce a new type of artifact?
- Why is the amplitude envelope calculated by filtering the data, and not by doing convolution with a complex wavelet at the frequency of interest? If I understand correctly this would avoid the edge artifact of a bandpass FIR filter. Or am I confused by how to calculate a power envelope? Not sure..
- In Panel D, Artifactual correlations are an issue until about 2 seconds; is this in case of filtering around 10 Hz only? I am interested in gamma.

Thanks again!

Raquel
________________________________________
From: Simon-Shlomo Poil <poi...@nb...>
Sent: Tuesday, May 31, 2016 6:52 PM
To: The NBT help maillist
Subject: Re: [NBThelp] how much data for DFA

Hi Raquel,

Yes, Alexander is right - 1 second is not enough for DFA analysis on the
amplitude envelope. The effect of filtering your signal will introduce
filter artifacts on the order of 1 second.
You can read more about DFA on this page
https://www.nbtwiki.net/doku.php?id=tutorial:detrended_fluctuation_analysis_dfa#.V02-3WaRuYU

-Simon

--
Dr. Simon-Shlomo Poil
Co-founder / Chief Technology Officer

NBT Analytics BV
Amsterdam Health and Technology Center
Paasheuvelweg 25
1105BP Amsterdam
The Netherlands

Mobile number (Swiss): +41 (0)76 399 5809
Mobile number (Dutch): +31 (0) 62 030 7288
Skype: poil.simonshlomo
Website: https://www.nbt-analytics.com

<http://www.nbt-analytics.com/>

2016-05-31 17:48 GMT+02:00 Alexander Cerquera <ale...@ua...
>:

> Dear Raquel,
>
> I'm not an outstanding expert in DFA, but I'm sure that it's a measure to
> characterize a time series in large scales, in order to identify its
> long-term memory features analysing its self-similarity properties.
> Therefore, I think that it doesn't makes sense taking just 1 second to
> apply this measure...
>
> --
>
> Edwin Alexander Cerquera S. M. Eng. Ph.D. (Dr. rer. nat.)
> Associate Professor - IEEE Senior Member | ResearchGate profile
> <https://www.researchgate.net/profile/Alexander_Cerquera> |
> IEEE-Collabratec
> profile <https://ieee-collabratec.ieee.org/app/p/AlexanderCerquera>
> Faculty of Electronic and Biomedical Engineering - Complex Systems Research
> Group
> Universidad Antonio Nariño
>
> Carrera 3 Este No 47 A - 15, Bloque 4, Piso 1
> Bogota, Colombia,  Tel: (+57-1) 3400135
>
> 2016-05-31 9:29 GMT-05:00 Raquel London <Raq...@ug...>:
>
> > Hi NBT listers,
> >
> >
> > First of all, thanks for making this resource freely available. I am just
> > getting started with the NBT and I have a basic question; how long do my
> > data segments need to be for a meaningful DFA? So far I've mainly come
> > across resting state applications, but I am interested in prestimulus
> > interval activity. Would it make sense to apply DFA to 1 sec pieces of
> EEG
> > data with a sample rate of 1024 Hz?? Does it depend on which frequencies
> > I'm interested in?
> >
> >
> > Thank you!
> >
> > Raquel
> >
> >
> ------------------------------------------------------------------------------
> > What NetFlow Analyzer can do for you? Monitors network bandwidth and
> > traffic
> > patterns at an interface-level. Reveals which users, apps, and protocols
> > are
> > consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> > J-Flow, sFlow and other flows. Make informed decisions using capacity
> > planning reports.
> https://ad.doubleclick.net/ddm/clk/305295220;132659582;e
> > _______________________________________________
> > The NBT help mailing list.
> >
> > Visit our webpage:
> > http://www.nbtwiki.net
> >
> > LinkedIn: http://l.nbtwiki.net/nbtlinkedin
> > Facebook: http://l.nbtwiki.net/nbtfacebook
> >
> > Do you need help with NBT?, see
> > http://l.nbtwiki.net/HRIMOF
> >
> > Get involved, see
> > http://l.nbtwiki.net/HRf5Ns
> >
> > To unsubscribe write a mail to
> > nbt...@li... with 'unsubscribe' in the
> > subject line (without ' ')
> > Or go to the mail-list administration page to unsubscribe:
> > https://lists.sourceforge.net/lists/listinfo/nbtoolbox-help
> >
> >
> >
>
> ------------------------------------------------------------------------------
> What NetFlow Analyzer can do for you? Monitors network bandwidth and
> traffic
> patterns at an interface-level. Reveals which users, apps, and protocols
> are
> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> J-Flow, sFlow and other flows. Make informed decisions using capacity
> planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e
> _______________________________________________
> The NBT help mailing list.
>
> Visit our webpage:
> http://www.nbtwiki.net
>
> LinkedIn: http://l.nbtwiki.net/nbtlinkedin
> Facebook: http://l.nbtwiki.net/nbtfacebook
>
> Do you need help with NBT?, see
> http://l.nbtwiki.net/HRIMOF
>
> Get involved, see
> http://l.nbtwiki.net/HRf5Ns
>
> To unsubscribe write a mail to
> nbt...@li... with 'unsubscribe' in the
> subject line (without ' ')
> Or go to the mail-list administration page to unsubscribe:
> https://lists.sourceforge.net/lists/listinfo/nbtoolbox-help
>
>
>

--
NBT Analytics BV
http://www.nbt-analytics.com

IMPORTANT: This message and any attachments are intended for the individual
or entity named above. It may contain confidential, proprietary or legally
privileged information. No confidentiality or privilege is waived or lost
by any mistransmission. If you are not the intended recipient, you must not
read, copy, use or disclose this communication to others; also please
notify the sender by replying to this message, and then delete it from your
system. Thank you.

Re: [NBThelp] how much data for DFA

[Simon-Shlomo P. <poi...@nb...>]

Hi Raquel,

Yes, Alexander is right - 1 second is not enough for DFA analysis on the
amplitude envelope. The effect of filtering your signal will introduce
filter artifacts on the order of 1 second.
You can read more about DFA on this page
https://www.nbtwiki.net/doku.php?id=tutorial:detrended_fluctuation_analysis_dfa#.V02-3WaRuYU

-Simon

--
Dr. Simon-Shlomo Poil
Co-founder / Chief Technology Officer

NBT Analytics BV
Amsterdam Health and Technology Center
Paasheuvelweg 25
1105BP Amsterdam
The Netherlands

Mobile number (Swiss): +41 (0)76 399 5809
Mobile number (Dutch): +31 (0) 62 030 7288
Skype: poil.simonshlomo
Website: https://www.nbt-analytics.com

<http://www.nbt-analytics.com/>

2016-05-31 17:48 GMT+02:00 Alexander Cerquera <ale...@ua...
>:

> Dear Raquel,
>
> I'm not an outstanding expert in DFA, but I'm sure that it's a measure to
> characterize a time series in large scales, in order to identify its
> long-term memory features analysing its self-similarity properties.
> Therefore, I think that it doesn't makes sense taking just 1 second to
> apply this measure...
>
> --
>
> Edwin Alexander Cerquera S. M. Eng. Ph.D. (Dr. rer. nat.)
> Associate Professor - IEEE Senior Member | ResearchGate profile
> <https://www.researchgate.net/profile/Alexander_Cerquera> |
> IEEE-Collabratec
> profile <https://ieee-collabratec.ieee.org/app/p/AlexanderCerquera>
> Faculty of Electronic and Biomedical Engineering - Complex Systems Research
> Group
> Universidad Antonio Nariño
>
> Carrera 3 Este No 47 A - 15, Bloque 4, Piso 1
> Bogota, Colombia,  Tel: (+57-1) 3400135
>
> 2016-05-31 9:29 GMT-05:00 Raquel London <Raq...@ug...>:
>
> > Hi NBT listers,
> >
> >
> > First of all, thanks for making this resource freely available. I am just
> > getting started with the NBT and I have a basic question; how long do my
> > data segments need to be for a meaningful DFA? So far I've mainly come
> > across resting state applications, but I am interested in prestimulus
> > interval activity. Would it make sense to apply DFA to 1 sec pieces of
> EEG
> > data with a sample rate of 1024 Hz?? Does it depend on which frequencies
> > I'm interested in?
> >
> >
> > Thank you!
> >
> > Raquel
> >
> >
> ------------------------------------------------------------------------------
> > What NetFlow Analyzer can do for you? Monitors network bandwidth and
> > traffic
> > patterns at an interface-level. Reveals which users, apps, and protocols
> > are
> > consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> > J-Flow, sFlow and other flows. Make informed decisions using capacity
> > planning reports.
> https://ad.doubleclick.net/ddm/clk/305295220;132659582;e
> > _______________________________________________
> > The NBT help mailing list.
> >
> > Visit our webpage:
> > http://www.nbtwiki.net
> >
> > LinkedIn: http://l.nbtwiki.net/nbtlinkedin
> > Facebook: http://l.nbtwiki.net/nbtfacebook
> >
> > Do you need help with NBT?, see
> > http://l.nbtwiki.net/HRIMOF
> >
> > Get involved, see
> > http://l.nbtwiki.net/HRf5Ns
> >
> > To unsubscribe write a mail to
> > nbt...@li... with 'unsubscribe' in the
> > subject line (without ' ')
> > Or go to the mail-list administration page to unsubscribe:
> > https://lists.sourceforge.net/lists/listinfo/nbtoolbox-help
> >
> >
> >
>
> ------------------------------------------------------------------------------
> What NetFlow Analyzer can do for you? Monitors network bandwidth and
> traffic
> patterns at an interface-level. Reveals which users, apps, and protocols
> are
> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> J-Flow, sFlow and other flows. Make informed decisions using capacity
> planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e
> _______________________________________________
> The NBT help mailing list.
>
> Visit our webpage:
> http://www.nbtwiki.net
>
> LinkedIn: http://l.nbtwiki.net/nbtlinkedin
> Facebook: http://l.nbtwiki.net/nbtfacebook
>
> Do you need help with NBT?, see
> http://l.nbtwiki.net/HRIMOF
>
> Get involved, see
> http://l.nbtwiki.net/HRf5Ns
>
> To unsubscribe write a mail to
> nbt...@li... with 'unsubscribe' in the
> subject line (without ' ')
> Or go to the mail-list administration page to unsubscribe:
> https://lists.sourceforge.net/lists/listinfo/nbtoolbox-help
>
>
>

-- 
NBT Analytics BV
http://www.nbt-analytics.com

IMPORTANT: This message and any attachments are intended for the individual 
or entity named above. It may contain confidential, proprietary or legally 
privileged information. No confidentiality or privilege is waived or lost 
by any mistransmission. If you are not the intended recipient, you must not 
read, copy, use or disclose this communication to others; also please 
notify the sender by replying to this message, and then delete it from your 
system. Thank you.

Re: [NBThelp] how much data for DFA

[Alexander C. <ale...@ua...>]

Dear Raquel,

I'm not an outstanding expert in DFA, but I'm sure that it's a measure to
characterize a time series in large scales, in order to identify its
long-term memory features analysing its self-similarity properties.
Therefore, I think that it doesn't makes sense taking just 1 second to
apply this measure...

--

Edwin Alexander Cerquera S. M. Eng. Ph.D. (Dr. rer. nat.)
Associate Professor - IEEE Senior Member | ResearchGate profile
<https://www.researchgate.net/profile/Alexander_Cerquera> | IEEE-Collabratec
profile <https://ieee-collabratec.ieee.org/app/p/AlexanderCerquera>
Faculty of Electronic and Biomedical Engineering - Complex Systems Research
Group
Universidad Antonio Nariño

Carrera 3 Este No 47 A - 15, Bloque 4, Piso 1
Bogota, Colombia,  Tel: (+57-1) 3400135

2016-05-31 9:29 GMT-05:00 Raquel London <Raq...@ug...>:

> Hi NBT listers,
>
>
> First of all, thanks for making this resource freely available. I am just
> getting started with the NBT and I have a basic question; how long do my
> data segments need to be for a meaningful DFA? So far I've mainly come
> across resting state applications, but I am interested in prestimulus
> interval activity. Would it make sense to apply DFA to 1 sec pieces of EEG
> data with a sample rate of 1024 Hz?? Does it depend on which frequencies
> I'm interested in?
>
>
> Thank you!
>
> Raquel
>
> ------------------------------------------------------------------------------
> What NetFlow Analyzer can do for you? Monitors network bandwidth and
> traffic
> patterns at an interface-level. Reveals which users, apps, and protocols
> are
> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> J-Flow, sFlow and other flows. Make informed decisions using capacity
> planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e
> _______________________________________________
> The NBT help mailing list.
>
> Visit our webpage:
> http://www.nbtwiki.net
>
> LinkedIn: http://l.nbtwiki.net/nbtlinkedin
> Facebook: http://l.nbtwiki.net/nbtfacebook
>
> Do you need help with NBT?, see
> http://l.nbtwiki.net/HRIMOF
>
> Get involved, see
> http://l.nbtwiki.net/HRf5Ns
>
> To unsubscribe write a mail to
> nbt...@li... with 'unsubscribe' in the
> subject line (without ' ')
> Or go to the mail-list administration page to unsubscribe:
> https://lists.sourceforge.net/lists/listinfo/nbtoolbox-help
>
>
>

[NBThelp] how much data for DFA

[Raquel L. <Raq...@UG...>]

Hi NBT listers,


First of all, thanks for making this resource freely available. I am just getting started with the NBT and I have a basic question; how long do my data segments need to be for a meaningful DFA? So far I've mainly come across resting state applications, but I am interested in prestimulus interval activity. Would it make sense to apply DFA to 1 sec pieces of EEG data with a sample rate of 1024 Hz?? Does it depend on which frequencies I'm interested in?


Thank you!

Raquel

[NBThelp] Export Biomarkers Button Missing

[Heather H. <hh...@gm...>]

Hello NBT team,

When I open the biomarker statistics gui and I want to export my biomarkers
the export biomarkers button is mission and instead I see "compare
biomarkers." I have attached a screenshot of what this looks like. If
anyone can tell me how to fix this and restore the export biomarkers button
that would be fantastic,

Thank you,

Heather

[NBThelp] Viewing calculated biomarkers

[sarah h. <sar...@ho...>]

Hello all,


I'm new to the toolbox and so apologies for my very basic question but I have computed the biomarkers I want for my subject (at the moment these are just power measures) and these have been saved into an analysis file back in the original folder. My question is how do I actually get the values I want from this file? I literally just want a value for each of the biomarkers I computed for my subject.


I'm assuming it has something to do with what is stated on the website, about how results are stored "in an amplitude biomarker object (see nbt_Amplitude for the definition of these objects)"? However the nbt_Amplitude link provided does not appear to be working for me.


Thank you very much everyone

[NBThelp] N-Coupled Rossler Oscillators

[zahra g. <zah...@ya...>]

> Dear NBT Team;
> 
> Hello,
> With many special thanks for your useful toolbox,
> I am looking for a MATLAB script for more than 2 coupled
> Rossler systems.
> The so-called nbt_runRossler.m does it for 2 systems.
> Could you help me please?
> 
> best regards,
> Zahra Ghanbari.
> 


   

[NBThelp] (no subject)

[Leonardo L. <lli...@gm...>]

Dear all,


I have my data in ".set" format, in order to load it into NBT, I followd
the tutorial information:

Importing data into NBT formatIntroduction: The NBT file format
 In order to use the scripts from NBT in the most efficient way, you need
to convert your data into the NBT file format. This file format insures
that information about your recording can easily be read by the NBT
functions.  The NBT signal file format consists of two files; the Signal
and Info file. These files are named after the NBT file name definition:
<ProjectID>.<SubjectID>.<Date of recording>.<Condition>  e.g.,
NBT.S0099.20090212.EOR2.  If this information is not available, you will
still have to add dummy information, e.g., YYYYMMDD instead of the actual
date. E.g., NBT.S0099.YYYYMMDD.EOR2.  The signal data is stored in a NBT
Signal file (.mat format), that contains a Signal matrix called Signal, in
which each column represents a signal from one channel.  Information about
the signal is stored in the NBT Info file (.mat format) that contains an
NBT Info object. The NBT Info file has the same name as the NBT Signal
file, extended with _info, for example NBT.S0099.20090212.EOR2_info. This
file contains an NBT Info object called SignalInfo (see nbt_Info.m for
definition). The original name of your file is stored in this object, in
the field Info.interface.original_file_name.  The reason for this separate
Info file is to be able to quickly access and add information. If the Info
file would be in the same file as the signal data, then every time you
would like to add new information, you would have to resave the complete
data file, which may take a long time if the signals are long (this is an
unfortunate property of Matlab).

*Is this a correct way to covert my data into NBT format?*

Now I have my data as the attached photo,  and I need to compute the
"Spectral biomarkers" from "Compute biomarkers"menu; knowing that I
selected "CLEANSignal" because my data that are form".set" format were
aalready preprocess and cleaned using EEGLAB,

then I convert it into NBT applying the process I explained at begining.
After doing so, I had this result in Matlab command window:



NBT.S0001.081209.ht.mat
Warning: Variable 'CLEANSignal' not found.
> In nbt_NBTcompute at 117
Warning: Variable 'CLEANSignalInfo' not found.
> In nbt_NBTcompute at 119
Warning: No Signal in file: C:\Users\User\Desktop\Harakat\New harakat
data\HARAKT-NBT-BASED DATA/NBT.S0001.081209.ht.mat
> In nbt_NBTcompute at 167
NBT.S0001.081209.noht.mat
Warning: Variable 'CLEANSignal' not found.
> In nbt_NBTcompute at 117
Warning: Variable 'CLEANSignalInfo' not found.
> In nbt_NBTcompute at 119
Warning: No Signal in file: C:\Users\User\Desktop\Harakat\New harakat
data\HARAKT-NBT-BASED DATA/NBT.S0001.081209.noht.mat
> In nbt_NBTcompute at 167
NBT.S0002.081209.ht.mat
Warning: Variable 'CLEANSignal' not found.
> In nbt_NBTcompute at 117
Warning: Variable 'CLEANSignalInfo' not found.
> In nbt_NBTcompute at 119
Warning: No Signal in file: C:\Users\User\Desktop\Harakat\New harakat
data\HARAKT-NBT-BASED DATA/NBT.S0002.081209.ht.mat
> In nbt_NBTcompute at 167
NBT.S0002.081209.noht.mat
Warning: Variable 'CLEANSignal' not found.
> In nbt_NBTcompute at 117
Warning: Variable 'CLEANSignalInfo' not found.
> In nbt_NBTcompute at 119
Warning: No Signal in file: C:\Users\User\Desktop\Harakat\New harakat
data\HARAKT-NBT-BASED DATA/NBT.S0002.081209.noht.mat
> In nbt_NBTcompute at 167
NBT.S0003.081209.ht.mat
Warning: Variable 'CLEANSignal' not found.
> In nbt_NBTcompute at 117
Warning: Variable 'CLEANSignalInfo' not found.
> In nbt_NBTcompute at 119
Warning: No Signal in file: C:\Users\User\Desktop\Harakat\New harakat
data\HARAKT-NBT-BASED DATA/NBT.S0003.081209.ht.mat
> In nbt_NBTcompute at 167
NBT.S0003.081209.noht.mat
Warning: Variable 'CLEANSignal' not found.
> In nbt_NBTcompute at 117
Warning: Variable 'CLEANSignalInfo' not found.
> In nbt_NBTcompute at 119
Warning: No Signal in file: C:\Users\User\Desktop\Harakat\New harakat
data\HARAKT-NBT-BASED DATA/NBT.S0003.081209.noht.mat
> In nbt_NBTcompute at 167


NB: I had same error message in  Signal and  ICASignal


*How to solve this problem?*