gnuplot-info — For questions and discussion about gnuplot

[Gnuplot-info] ROC curves in GNUPLOT

[nirud <ni...@o2...>]

Hi. I'm trying to get ROC curves in gnuplot. If somebody doesn't know what
kind of ROC curves - it's easy to explain what I want to have

example:
xrange - 0:100
yrange - 0:100

I have 3 points (0,0), (100, 100) and (80,20) what I want it's to connect
this point whith curves not lines. I tried to use function fit (with
a*exp(X*b), a*log(x*b) or even a*x**3 + b) but it doesn't works... I know
that as more point I have that easier I can plot my curves, but
unfortunately I can have only this 3 points.

Maybe here is anybody who can help me with that problem and know something
what can put me on the right track... Txh in adnance

PS: sorry for my ENG mistakes...
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[Gnuplot-info] Dynamic web interface?

[Michael S. <mic...@ha...>]

Hi.

I'm looking for a "dynamic web interface" to Gnuplot. What
I'd like to be able is, that I would like to zoom in/out
by drawing rectangles on the plot, I'd like to "scroll" to
the right/left/up/down and, if there is more than one curve
shown on the graph, I'd like to be able to selectively turn
on/off curves.

But the most important feature request is the ability to
zoom and move the window.

Does anyone about such a thing?

Cheers,
Michael

Re: [Gnuplot-info] gnuplot language

[rhubbell <rhu...@ih...>]

Ok, this makes more sense now. I'm sure it's obvious to some.
Was not obvious to me.

I'm still trying to understand parametric mode.

I would like to be able to create a plot like that using
experimental data.

Could one z-value be assigned zero all the time and the
other z-value be the z from the x,y,z triple from the file?

Maybe I'm going about this all wrong. The data is like
this:

col. 1 = date/time
col. 2-25 = data for hours 0-23

So the data are in rows. Does gnuplot not like data in rows?
I can massage into columns but that makes the data files
4 * (row oriented data file in bytes)


On Sun, 2008-11-30 at 11:39 -0800, Thomas Sefzick wrote:
> 'surface1.16.gnu' simply doesn't work with data, because
> it works in parametric mode using 2 parameters (u,v) which
> require the use of functions to map to (x,y,z), producing
> vertical surfaces which in non-parametric mode are not
> possible to plot.
> 
> data from a file are read as (x,y,z) triples, therefore 'splot'
> works in non-parametric mode, so there is only one z-value
> per (x,y) coordinate.
> this means, no way to produce vertical surfaces which need
> two z-values per (x,y) coordinate.
> 
> > For example taking this demo and making it into a demo that uses
> > experimental data would provide an excellent example
> > of using data files.
> >
> > http://gnuplot.sourceforge.net/demo_4.2/surface1.16.gnu
> 

Re: [Gnuplot-info] gnuplot language

[Thomas S. <t.s...@fz...>]

'surface1.16.gnu' simply doesn't work with data, because
it works in parametric mode using 2 parameters (u,v) which
require the use of functions to map to (x,y,z), producing
vertical surfaces which in non-parametric mode are not
possible to plot.

data from a file are read as (x,y,z) triples, therefore 'splot'
works in non-parametric mode, so there is only one z-value
per (x,y) coordinate.
this means, no way to produce vertical surfaces which need
two z-values per (x,y) coordinate.

> For example taking this demo and making it into a demo that uses
> experimental data would provide an excellent example
> of using data files.
>
> http://gnuplot.sourceforge.net/demo_4.2/surface1.16.gnu

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Re: [Gnuplot-info] gnuplot language

[rhubbell <rhu...@ih...>]

For example taking this demo and making it into a demo that uses
experimental data would provide an excellent example
of using data files.

http://gnuplot.sourceforge.net/demo_4.2/surface1.16.gnu



On Sun, 2008-11-30 at 08:47 -0800, rhubbell wrote:
> Thanks, that does help, my problem partly stems from the fact that many
> (most) of the demos are incomplete in that they simply plot functions.
> 
> The hard part is taking data from files and plotting that information.
> Ideally the demos would do both, plot a function and plot experimental
> data.
> 
> 
> On Sat, 2008-11-29 at 11:43 -0800, Thomas Sefzick wrote:
> > if you download gnuplot, either as source or binary, it comes
> > with a demo directory with all the scripts and data files in it.

Re: [Gnuplot-info] gnuplot language

[rhubbell <rhu...@ih...>]

Thanks, that does help, my problem partly stems from the fact that many
(most) of the demos are incomplete in that they simply plot functions.

The hard part is taking data from files and plotting that information.
Ideally the demos would do both, plot a function and plot experimental
data.


On Sat, 2008-11-29 at 11:43 -0800, Thomas Sefzick wrote:
> if you download gnuplot, either as source or binary, it comes
> with a demo directory with all the scripts and data files in it.
> 

Re: [Gnuplot-info] gnuplot language

[Thomas S. <t.s...@fz...>]

if you download gnuplot, either as source or binary, it comes
with a demo directory with all the scripts and data files in it.

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[Gnuplot-info] gnuplot language

[rhubbell <rhu...@ih...>]

One of the things I've noticed is that the gnuplot demos I find
don't have the actual data files used to create the plots.

Since gnuplot has its own language, I find that as with any other
language, language examples to be the best way
to learn.  So am I missing the data files?
I just use the gnuplot.info site to look at the examples.
Maybe there's a better way.

Re: [Gnuplot-info] timefmt question

[Thomas S. <t.s...@fz...>]

with gnuplot 3.7, 4.0, 4.2.2, 4.2.3, 4.3_cvs and the following commands

set xdata time
set timefmt "%m-%d-%Y %H:%M"
plot 'tempdata.dat' us 1:3 w lp, '' us 1:4 w lp, '' us 1:5 w lp, '' us 1:6 w
lp

i didn't manage to reproduce the error, everything is running fine.

which version of gnuplot are you using under which operating system?
are there any control characters in your data file which disappear when
copying the data into the email with cut and paste?

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Re: [Gnuplot-info] timefmt question

[Rp3 <rpw...@gm...>]

Rp3 wrote:
> 
> I have some data that looks like this.
> 
> 10-25-2008 23:15 0072.37 0064.27 0048.65 0053.70
> 10-25-2008 23:30 0072.26 0064.16 0048.30 0053.25
> 10-25-2008 23:45 0071.92 0064.16 0047.96 0052.91
> 10-26-2008 0:0 0071.92 0064.05 0047.85 0052.57
> 10-26-2008 0:15 0071.70 0063.82 0047.17 0052.25
> 10-26-2008 0:30 0071.60 0063.60 0046.95 0051.90
> 
> As you can see it is date then time, then some temperature data.
> 
> So I try to set the timefmt string to match as this 
> set timefmt "%m-%d-%Y %H:%M"
> 
> but when I re-run the plot I get this error?
> tempdata.dat:10:         illegal month
> 
> Which happens to be the first line with the time reference of 0:0
> (midnight).
> 
> I have read through the dox and timefmt is supposed to read hours and mins
> like this but it seems to not work, and the error message has me more
> baffled as it references a "illegal month"??
> 
> Any help would be appreciated.
> 
> 


I guess I should have shown the complete begining of the file.  Here it is.

#date, time, inside temp, garage temp, outside temp, attic temp
10-25-2008 22:8 0072.26 0064.95 0050.10 0055.72
10-25-2008 22:15 0072.15 0064.95 0050.00 0055.50
10-25-2008 22:30 0072.15 0064.85 0049.65 0055.05
10-25-2008 22:45 0072.37 0064.61 0049.31 0054.60
10-25-2008 23:0 0072.37 0064.40 0049.10 0054.05
10-25-2008 23:15 0072.37 0064.27 0048.65 0053.70
10-25-2008 23:30 0072.26 0064.16 0048.30 0053.25
10-25-2008 23:45 0071.92 0064.16 0047.96 0052.91
10-26-2008 0:0 0071.92 0064.05 0047.85 0052.57
10-26-2008 0:15 0071.70 0063.82 0047.17 0052.25
10-26-2008 0:30 0071.60 0063.60 0046.95 0051.90
10-26-2008 0:45 0071.36 0063.37 0046.61 0051.56
10-26-2008 1:0 0071.15 0063.15 0046.27 0051.11
10-26-2008 1:15 0070.91 0062.92 0045.95 0050.77
10-26-2008 1:30 0070.80 0062.92 0045.50 0050.32

Now you can see line 10 is the first with 0 as an hour, but looking at some
of your replies it seems the %H in the timefmt string is looking for two
chars, so I guess I will have to change my perl program to do this?

Hmm Interesting.  I guess that is what I will do, modify the program to make
the hours always two digits?

Unless someone else has a suggestion?

:)
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[Gnuplot-info] timefmt question

[Rp3 <rpw...@gm...>]

I have some data that looks like this.

10-25-2008 23:15 0072.37 0064.27 0048.65 0053.70
10-25-2008 23:30 0072.26 0064.16 0048.30 0053.25
10-25-2008 23:45 0071.92 0064.16 0047.96 0052.91
10-26-2008 0:0 0071.92 0064.05 0047.85 0052.57
10-26-2008 0:15 0071.70 0063.82 0047.17 0052.25
10-26-2008 0:30 0071.60 0063.60 0046.95 0051.90

As you can see it is date then time, then some temperature data.

So I try to set the timefmt string to match as this 
set timefmt "%m-%d-%Y %H:%M"

but when I re-run the plot I get this error?
tempdata.dat:10:         illegal month

Which happens to be the first line with the time reference of 0:0
(midnight).

I have read through the dox and timefmt is supposed to read hours and mins
like this but it seems to not work, and the error message has me more
baffled as it references a "illegal month"??

Any help would be appreciated.

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Re: [Gnuplot-info] Plotting with lines and symbols at the same time

[Thomas S. <t.s...@fz...>]

plot ... with linespoints

see
help linespoints
or
http://www.gnuplot.info/docs/node145.html
http://www.gnuplot.info/docs/node255.html

> Hi all!
> this looks like an easy question, but I couldn't  find out!
> I want to plot with lines and with symbols at the same time.
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[Gnuplot-info] Plotting with lines and symbols at the same time

[Julien D. <Jul...@da...>]

Hi all!
this looks like an easy question, but I couldn't  find out!
I want to plot with lines and with symbols at the same time.

I could plot the data twice but that's not really fancy. what is the  
proper way to do it?
thanks very much!

Julien



On 22-Nov-08, at 4:40 PM, rhubbell wrote:

> Anyone want to try at this? Is it too easy? Too hard to answer?
>
> Not enough info provided?  Is this the wrong group for this sort of
> question? If so what group is appropriate?
>
>
> On Tue, 2008-11-18 at 19:45 -0800, rhubbell wrote:
>> Hello all,
>>
>> (Trying this again....fat-fingered the previous one and sent it  
>> somehow.)
>>
>> I've found some examples that were close to what I am trying to do.
>> But not close enough and I'm unable to get it to work.
>>
>>
>> I've got data like so:
>>
>> Date      1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00 10:00 11:00  
>> 12:00
>> 20081110  5     3    4    5    5     3    4    5    5     3      
>> 4     5
>> 20081111  6     3    4    5    7     3    4    7    3     4      
>> 7     3
>> 20081112  7     3    4    3    4     5    5    3    6     3      
>> 4     5
>>
>> I want to use time on the x-axis and date on the y-axis
>>
>> It's not clear to me how to get the row and column headings.
>>
>>
>> I would be glad to be able to do something like this:
>>
>> http://gnuplot.sourceforge.net/demo_4.2/surface1.16.png
>>
>>
>> http://gnuplot.sourceforge.net/demo_4.2/surface1.16.gnu
>>
>> http://gnuplot.sourceforge.net/demo_4.2/surface1.17.gnu
>>
>
>
>
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Re: [Gnuplot-info] generate gif output for gnuplot

[markjoe <na...@ma...>]

The problem with dashes and the like in pixel formats is that they don't come
out very well. I guess that's the reason the option for dashes/dots don't
exist. 

For all your converting needs: imagemagick's convert.


scipi wrote:
> 
> 


Thanks for the idee to convert the eps into gif, but I need it to automatise
by scripts, becauce the gif Plots should be createt automaticaly by a
Fortran Program.
Any ideas for a nice and free converting tool?


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Re: [Gnuplot-info] generate gif output for gnuplot

[scipi <t....@we...>]

Thanks for the idee to convert the eps into gif, but I need it to automatise
by scripts, becauce the gif Plots should be createt automaticaly by a
Fortran Program.
Any ideas for a nice and free converting tool?
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Re: [Gnuplot-info] trying to sort out splot

[rhubbell <rhu...@ih...>]

Anyone want to try at this? Is it too easy? Too hard to answer?

Not enough info provided?  Is this the wrong group for this sort of
question? If so what group is appropriate?


On Tue, 2008-11-18 at 19:45 -0800, rhubbell wrote:
> Hello all,
> 
> (Trying this again....fat-fingered the previous one and sent it somehow.)
> 
> I've found some examples that were close to what I am trying to do.
> But not close enough and I'm unable to get it to work.
> 
> 
> I've got data like so:
> 
> Date      1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00
> 20081110  5     3    4    5    5     3    4    5    5     3     4     5  
> 20081111  6     3    4    5    7     3    4    7    3     4     7     3  
> 20081112  7     3    4    3    4     5    5    3    6     3     4     5
> 
> I want to use time on the x-axis and date on the y-axis
> 
> It's not clear to me how to get the row and column headings.
> 
> 
> I would be glad to be able to do something like this:
> 
> http://gnuplot.sourceforge.net/demo_4.2/surface1.16.png
> 
> 
> http://gnuplot.sourceforge.net/demo_4.2/surface1.16.gnu
> 
> http://gnuplot.sourceforge.net/demo_4.2/surface1.17.gnu
> 

Re: [Gnuplot-info] generate gif output for gnuplot

[J. M. M. <jos...@gm...>]

Hello

i think that you can create a gif from your nice eps. using gimp, or
other image manipulation soft

Saludos
Jose Maria

2008/11/21 scipi <t....@we...>:
>
> Hello,
> I want to print a graph in gnuplot with different linetypes, like dashed,
> pointed,…
> When I print it into a .eps it works in this way:
> set terminal postscript enhanced eps color
> ...
> plot [] [-1:1] "000_rU1.dat" using 1:2 title " U1" with line lt 2 lw 2 lc
> rgb "black"
> but with the .gif output (set terminal gif) all linetypes are without
> dashes.
>
> Ideas  how to solve the Problem would be very nice.
> Thanks a lot
>
> --
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>
>
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[Gnuplot-info] generate gif output for gnuplot

[scipi <t....@we...>]

Hello,
I want to print a graph in gnuplot with different linetypes, like dashed,
pointed,…
When I print it into a .eps it works in this way:
set terminal postscript enhanced eps color
...
plot [] [-1:1] "000_rU1.dat" using 1:2 title " U1" with line lt 2 lw 2 lc
rgb "black"
but with the .gif output (set terminal gif) all linetypes are without
dashes. 

Ideas  how to solve the Problem would be very nice.
Thanks a lot

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Re: [Gnuplot-info] Color plot : how to set zrange? (color range?)

[Hans-Bernhard B. <HBB...@t-...>]

Julien Derr wrote:
> I want to set the z range (color range)
> so i use :
>  >set zrange [0:1]

You're looking for "help cbrange"

Re: [Gnuplot-info] change view point in SVG 3d plots

[Hans-Bernhard B. <HBB...@t-...>]

maitai wrote:
> Hi, I created SVG 3d plots for some scientific data, and I need to be able to
> rotate the 3d plot. I'd like to do that in the browser that displays the SVG
> plot, using javascript to redraw the plot.

Sorry, but that's not possible.  It would require re-implementing the 
entire gnuplot in javascript.

SVG is a 2D data format.  There's no way to represent a third dimension, 
  thus no way to store the extra information needed to rotate the graph.

[Gnuplot-info] Color plot : how to set zrange? (color range?)

[Julien D. <Jul...@da...>]

Hi everyone!

I am plotting 3D data on 2D (color plot )by using:
 >set pm3d map
 >splot data  using 1:2:3

I want to set the z range (color range)
so i use :
 >set zrange [0:1]

everything is fine if my data have point z>1 or else it is just  
ignoring my order!
Do you have any idea/recommendations?
How can I set this zrange ?

thanks a lot,

Julien

[Gnuplot-info] trying to sort out splot

[rhubbell <rhu...@ih...>]

Hello all,

(Trying this again....fat-fingered the previous one and sent it somehow.)

I've found some examples that were close to what I am trying to do.
But not close enough and I'm unable to get it to work.


I've got data like so:

Date      1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00
20081110  5     3    4    5    5     3    4    5    5     3     4     5  
20081111  6     3    4    5    7     3    4    7    3     4     7     3  
20081112  7     3    4    3    4     5    5    3    6     3     4     5

I want to use time on the x-axis and date on the y-axis

It's not clear to me how to get the row and column headings.


I would be glad to be able to do something like this:

http://gnuplot.sourceforge.net/demo_4.2/surface1.16.png


http://gnuplot.sourceforge.net/demo_4.2/surface1.16.gnu

http://gnuplot.sourceforge.net/demo_4.2/surface1.17.gnu

[Gnuplot-info] trying to sort out splot

[rhubbell <rhu...@ih...>]

Hello all,

I've found some examples that were close to what I am trying to do.
But not close enough and I'm unable to get it to work.


I've got data like so:


20081110
2008111
2008111
2008111
2008111
2008111
2008111
2008111
2008111
2008111

[Gnuplot-info] change view point in SVG 3d plots

[maitai <mai...@ex...>]

Hi, I created SVG 3d plots for some scientific data, and I need to be able to
rotate the 3d plot. I'd like to do that in the browser that displays the SVG
plot, using javascript to redraw the plot. I know that I could simply
re-generate the plot in gnuplot and setting different view points, but that
would be inefficient.

the problem is I don't know about graphics and I don't know well how to do
it. SVG stores the plot in DOM, and I want to apply the necessary transforms
to the elements in the DOM. But I'm not sure what these transforms
(transformation matrix? *) should be to rotate in 3d the plot. Has anyone
tried this with svg plots from gnuplot?

I know this question is not strictly on gnuplot. Nonetheless, I thought that
maybe someone here may have tried this. I couldn't find any examples on the
internet. I'd much appreciate any hints.  

Thanks 
Jose

PS: 
I attach a simple example svg plot: 
http://www.nabble.com/file/p20571954/sampleplot.svg sampleplot.svg 
transform matrix:
http://www.w3.org/TR/SVG/coords.html#EstablishingANewUserSpace

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[Gnuplot-info] double y

[Julien D. <Jul...@DA...>]

Hi everyone!

Is there an easy way to plot double y plots with gnuplot ?
that is two plots y1(x) and y2(x)  with two different scales: one on  
the left, and one on the right?

or should I do a multiplot?

Julien