gnuplot-info — For questions and discussion about gnuplot

[Gnuplot-info] Moving Contour Map Lower on Z-Axis?

[Vik R. <vi...@mi...>]

I'm working on a 3D Contour Map. It starts at 0 on the Z-Axis. How can I move the 0 point on the Z-Axis closer to the floor of the chart?

Here's a link to see the 3D Contour Map:

https://www.dropbox.com/s/ovey50px5u4n5ph/Test%203D%20Contour%20Map.png

GnuPlot code:
unset cbrange
unset contour 
set xtics out nomirror
set ytics out nomirror
unset title
unset label
set label '{/=16 Test Chart}'   at 6, 11.25 center offset 0, 15
set xrange [1:10] reverse
set yrange [0:11]
set zrange [-2:50]
set term x11 size 500, 500 enhanced font '/Library/Fonts/Arial.ttf' 8 xffffff x000000 
set dgrid3d 500, 500 splines
set isosamples 100
set samples 100
unset key
set ztics 10
unset surface
set pm3d at bs
set palette defined (0 '#b7efbf', 2 '#b7efbf', 4 '#8ae092', 6 '#64c25a', 10 '#8dc14f', 16 '#bac14c', 20 '#febd42', 24 '#ec3700', 28 '#cd1c00', 32 '#6b5d6d', 36 '#3e85a5', 40 '#00bef3')
splot '/dataFile' 
set view 70,340
replot

Data:
0	0	0
1	0	0
2	0	0
3	0	0
4	0	0
5	0	0
6	0	0
7	0	0
8	0	0
9	0	0
10	0	0
11	0	0

0	1	0
1	1	0
2	1	0
3	1	0
4	1	0
5	1	0
6	1	0
7	1	0
8	1	0
9	1	1
10	1	0
11	1	0

0	2	0
1	2	1
2	2	0
3	2	0
4	2	0
5	2	0
6	2	1
7	2	0
8	2	0
9	2	0
10	2	0
11	2	0

0	3	0
1	3	1
2	3	0
3	3	0
4	3	0
5	3	0
6	3	0
7	3	0
8	3	0
9	3	0
10	3	0
11	3	0

0	4	0
1	4	3
2	4	0
3	4	0
4	4	0
5	4	0
6	4	0
7	4	0
8	4	0
9	4	0
10	4	0
11	4	0

0	5	0
1	5	3
2	5	0
3	5	0
4	5	0
5	5	0
6	5	0
7	5	0
8	5	0
9	5	0
10	5	0
11	5	0

0	6	0
1	6	3
2	6	1
3	6	0
4	6	0
5	6	0
6	6	0
7	6	0
8	6	1
9	6	0
10	6	0
11	6	0

0	7	0
1	7	2
2	7	0
3	7	0
4	7	1
5	7	0
6	7	0
7	7	0
8	7	0
9	7	0
10	7	0
11	7	0

0	8	0
1	8	4
2	8	0
3	8	0
4	8	0
5	8	0
6	8	0
7	8	0
8	8	0
9	8	0
10	8	0
11	8	0

0	9	0
1	9	2
2	9	1
3	9	1
4	9	0
5	9	0
6	9	1
7	9	1
8	9	0
9	9	0
10	9	0
11	9	0

0	10	0
1	10	6
2	10	0
3	10	0
4	10	0
5	10	0
6	10	0
7	10	0
8	10	0
9	10	0
10	10	0
11	10	0

0	11	0
1	11	0
2	11	0
3	11	0
4	11	0
5	11	0
6	11	0
7	11	0
8	11	0
9	11	0
10	11	0
11	11	0

Thanks very much in advance to all for any info.

Best,


-Vik

[Gnuplot-info] question on creating histogram

[Mahmood N. <nt_...@ya...>]

Hi
There are several examples on "how to plot histogram" using box and xticle. However I can not find information on how to plot a simple histogram from a file:


10
20
10
20
30

I want to see a plot like this (rotate it 90 deg counter clockwise).

0
10 * * * 

20 *
30 *
40
50

 
The commands
   plot "f:\his.txt" u 1:xtic(1)
or
   plot "f:\his.txt" u 1:with boxes
doesn't work for me.

I will be very thankful if you point the right keyword on how to plot such thing.



Regards,
Mahmood

Re: [Gnuplot-info] Plot matrix with GNUplot. Slow

[walter h. <wh...@bf...>]

I am ot sure that i understand your problem
do you want to plot something like a heatmap ?
i routinely plot 4000 * n via plot matrix with no problem

re,
 wh

Am 17.05.2013 22:36, schrieb Yonghui:
> Hi Ethan,
> 
> Thanks for your suggestion. I tried every. But it didn't work. For example:
> If the file (test.txt) is :
> 1 1 1 1
> 2 1 1 1
> 3 1 1 1
> 4 1 1 1
> 
> 1 2 2 2
> 2 2 2 2
> 3 2 2 2
> 4 2 2 2
> 
> 1 3 3 3
> 2 3 3 3
> 3 3 3 3
> 4 3 3 3
> 
> Then set pm3d, set view map, unset surf
> The sp "test.txt" matrix ind 0 is exactly what I need. But I completely have
> no idea on how to use every to make the same plot. If I do sp "test.txt"
> matrix every :::0::0, it doesn't make anything.
> 
> Could you please tell me how to make it work?
> 
> Thanks,
> Yonghui
> 
> -----Original Message-----
> From: Ethan A Merritt [mailto:eam...@gm...] 
> Sent: Friday, May 17, 2013 12:54 AM
> To: Yonghui
> Cc: gnu...@li...
> Subject: Re: [Gnuplot-info] Plot matrix with GNUplot. Slow
> 
> On Thursday, 16 May 2013, Yonghui wrote:
>> Thanks Ethan,
>>
>> I am actually making a movie. 200 pictures, each picture is the 
>> 100x100 matrix. Here is the command:
>  
>> ------------plot_TDM_loop.gp"----------------
>> splot '_TDTDM.dat' matrix ind i*10
>> print i
>> i=i+1
>> if (i<200) reread
>>
>> Please take a look. Thanks.
> 
> Ugh. 
> So it opens the file all over again each time, reads one line at a time
> until it gets to where it finished during the previous iteration, then reads
> one matrix and loops again.  That means the time goes up as N^2 rather than
> N.
> 
> I'm not certain, but I would guess that it would be faster if instead of
> using
>   splot $FOO matrix index i*10        (By the way, why 10?  Why not 100?)
> you used
>   splot $FOO matrix every 1:1:1:i::i
> 
> I may have mangled that "every" specfier right; you may have to tweak it.
> See "help every".
> The idea is that in order to read the Nth block you should skip the
> preceding N-1 blocks altogether rather than processing
> them line-by-line.   It still has to read in the data, but it
> won't bother to parse the contents of the lines you skip.
> 
> But really I think a better idea is to split the input into N separate files
> and then iterate over which file is read.
> That way it goes back to O(N) rather than O(N^2).
> 
> If you split the data into files file1.dat file2.dat ... fileN.dat your loop
> could look like this
> 
> set pm3d
> unset surface
> set view map
> set palette defined (-0.01 "red", 0 "white", 0.01 "blue") do for [i=1:N] { 
>     splot 'file' . i . '.dat' matrix;
> }
> unset out
> 
> 
> 	Ethan
> 
> 
>>
>> Yonghui
>>
>> -----Original Message-----
>> From: Ethan A Merritt [mailto:eam...@gm...]
>> Sent: Friday, May 17, 2013 12:18 AM
>> To: gnu...@li...
>> Cc: FortCpp
>> Subject: Re: [Gnuplot-info] Plot matrix with GNUplot. Slow
>>
>> On Thursday, 16 May 2013, FortCpp wrote:
>>> I am using GNUplot for plotting a small matrix. The matrix is 
>>> 100x100 by size. e.g.
>>>
>>> 1.23212 2.43123 -1.24312 ......
>>> -4.23123 2.00458 5.60234 ......
>>> ......
>>> The data is not neatly stored in the file. So from C++ point of 
>>> view, due to the lack of length per data, there is no way to load a 
>>> whole number, but it has to check when the number is loading. I 
>>> guess this should be the reason of the slow plotting speed.
>>>
>>> Now I have 3 questions:
>>> Q1: Is loading the bottle neck?
>>>
>>> Q2: If I can make the data file neatly stored (setw). e.g.
>>>
>>>  1.23212  2.43123 -1.24312 ......
>>> -4.23123  2.00458  5.60234 ......
>>> ......
>>> Does the plotting speed get any improvement? (Maybe GNUplot can 
>>> check what the pattern is. Thus improve the loading speed. Not 
>>> sure.)
>>
>> No. That won't make any difference.
>>
>>>
>>> Q3: Any other options that I can set to make it faster?
>>
>> gnuplot> help fpe
>>
>>  The `set datafile nofpe_trap` command tells gnuplot not to 
>> re-initialize a floating point exception handler before every 
>> expression evaluation used while  reading data from an input file.  
>> This can significantly speed data input from  very large files at the 
>> risk of program termination if a floating-point  exception is generated.
>>
>> You haven't shown us the commands you use to read the file, so I don't 
>> know if this is relevant to your case.
>>
>> There is a recent patch in the CVS version that hugely speeds up 
>> reading binary matrices, but since the matrix you show is in ascii 
>> that wouldn't help.
>>
>> 	Ethan
>>
>>
>> --
>> Tradition is not the worship of ashes, but the preservation of fire.
>>   - Gustav Mahler
>>
>>
> 
> 
> --
> Tradition is not the worship of ashes, but the preservation of fire.
>   - Gustav Mahler
> 
> 
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Re: [Gnuplot-info] Plot matrix with GNUplot. Slow

[Yonghui <lyh...@gm...>]

Hi Ethan,

Thanks for your suggestion. I tried every. But it didn't work. For example:
If the file (test.txt) is :
1 1 1 1
2 1 1 1
3 1 1 1
4 1 1 1

1 2 2 2
2 2 2 2
3 2 2 2
4 2 2 2

1 3 3 3
2 3 3 3
3 3 3 3
4 3 3 3

Then set pm3d, set view map, unset surf
The sp "test.txt" matrix ind 0 is exactly what I need. But I completely have
no idea on how to use every to make the same plot. If I do sp "test.txt"
matrix every :::0::0, it doesn't make anything.

Could you please tell me how to make it work?

Thanks,
Yonghui

-----Original Message-----
From: Ethan A Merritt [mailto:eam...@gm...] 
Sent: Friday, May 17, 2013 12:54 AM
To: Yonghui
Cc: gnu...@li...
Subject: Re: [Gnuplot-info] Plot matrix with GNUplot. Slow

On Thursday, 16 May 2013, Yonghui wrote:
> Thanks Ethan,
> 
> I am actually making a movie. 200 pictures, each picture is the 
> 100x100 matrix. Here is the command:
 
> ------------plot_TDM_loop.gp"----------------
> splot '_TDTDM.dat' matrix ind i*10
> print i
> i=i+1
> if (i<200) reread
> 
> Please take a look. Thanks.

Ugh. 
So it opens the file all over again each time, reads one line at a time
until it gets to where it finished during the previous iteration, then reads
one matrix and loops again.  That means the time goes up as N^2 rather than
N.

I'm not certain, but I would guess that it would be faster if instead of
using
  splot $FOO matrix index i*10        (By the way, why 10?  Why not 100?)
you used
  splot $FOO matrix every 1:1:1:i::i

I may have mangled that "every" specfier right; you may have to tweak it.
See "help every".
The idea is that in order to read the Nth block you should skip the
preceding N-1 blocks altogether rather than processing
them line-by-line.   It still has to read in the data, but it
won't bother to parse the contents of the lines you skip.

But really I think a better idea is to split the input into N separate files
and then iterate over which file is read.
That way it goes back to O(N) rather than O(N^2).

If you split the data into files file1.dat file2.dat ... fileN.dat your loop
could look like this

set pm3d
unset surface
set view map
set palette defined (-0.01 "red", 0 "white", 0.01 "blue") do for [i=1:N] { 
    splot 'file' . i . '.dat' matrix;
}
unset out


	Ethan


> 
> Yonghui
> 
> -----Original Message-----
> From: Ethan A Merritt [mailto:eam...@gm...]
> Sent: Friday, May 17, 2013 12:18 AM
> To: gnu...@li...
> Cc: FortCpp
> Subject: Re: [Gnuplot-info] Plot matrix with GNUplot. Slow
> 
> On Thursday, 16 May 2013, FortCpp wrote:
> > I am using GNUplot for plotting a small matrix. The matrix is 
> > 100x100 by size. e.g.
> > 
> > 1.23212 2.43123 -1.24312 ......
> > -4.23123 2.00458 5.60234 ......
> > ......
> > The data is not neatly stored in the file. So from C++ point of 
> > view, due to the lack of length per data, there is no way to load a 
> > whole number, but it has to check when the number is loading. I 
> > guess this should be the reason of the slow plotting speed.
> > 
> > Now I have 3 questions:
> > Q1: Is loading the bottle neck?
> > 
> > Q2: If I can make the data file neatly stored (setw). e.g.
> > 
> >  1.23212  2.43123 -1.24312 ......
> > -4.23123  2.00458  5.60234 ......
> > ......
> > Does the plotting speed get any improvement? (Maybe GNUplot can 
> > check what the pattern is. Thus improve the loading speed. Not 
> > sure.)
> 
> No. That won't make any difference.
> 
> > 
> > Q3: Any other options that I can set to make it faster?
> 
> gnuplot> help fpe
> 
>  The `set datafile nofpe_trap` command tells gnuplot not to 
> re-initialize a floating point exception handler before every 
> expression evaluation used while  reading data from an input file.  
> This can significantly speed data input from  very large files at the 
> risk of program termination if a floating-point  exception is generated.
> 
> You haven't shown us the commands you use to read the file, so I don't 
> know if this is relevant to your case.
> 
> There is a recent patch in the CVS version that hugely speeds up 
> reading binary matrices, but since the matrix you show is in ascii 
> that wouldn't help.
> 
> 	Ethan
> 
> 
> --
> Tradition is not the worship of ashes, but the preservation of fire.
>   - Gustav Mahler
> 
> 


--
Tradition is not the worship of ashes, but the preservation of fire.
  - Gustav Mahler

Re: [Gnuplot-info] Plot matrix with GNUplot. Slow

[Clement L. <the...@gm...>]

On 17 May 2013 06:54, Ethan A Merritt <eam...@gm...> wrote:

> set pm3d
> unset surface
> set view map
> set palette defined (-0.01 "red", 0 "white", 0.01 "blue")
> do for [i=1:N] {
>     splot 'file' . i . '.dat' matrix;
> }
> unset out

I just want to point out that you'll need version 4.6 and above. I say
this because I'm aware some people still use older versions,
particularly on university machines.

Re: [Gnuplot-info] Plot matrix with GNUplot. Slow

[Ethan A M. <eam...@gm...>]

On Thursday, 16 May 2013, Yonghui wrote:
> Thanks Ethan,
> 
> I am actually making a movie. 200 pictures, each picture is the 100x100
> matrix. Here is the command:
 
> ------------plot_TDM_loop.gp"----------------
> splot '_TDTDM.dat' matrix ind i*10
> print i
> i=i+1
> if (i<200) reread
> 
> Please take a look. Thanks.

Ugh. 
So it opens the file all over again each time,
reads one line at a time until it gets to where it
finished during the previous iteration, then reads
one matrix and loops again.  That means the
time goes up as N^2 rather than N.

I'm not certain, but I would guess that it would be
faster if instead of using
  splot $FOO matrix index i*10        (By the way, why 10?  Why not 100?)
you used 
  splot $FOO matrix every 1:1:1:i::i

I may have mangled that "every" specfier right;
you may have to tweak it.  See "help every".
The idea is that in order to read the Nth block you should skip 
the preceding N-1 blocks altogether rather than processing
them line-by-line.   It still has to read in the data, but it
won't bother to parse the contents of the lines you skip.

But really I think a better idea is to split the input into
N separate files and then iterate over which file is read.
That way it goes back to O(N) rather than O(N^2).

If you split the data into files file1.dat file2.dat ... fileN.dat
your loop could look like this

set pm3d
unset surface
set view map
set palette defined (-0.01 "red", 0 "white", 0.01 "blue")
do for [i=1:N] { 
    splot 'file' . i . '.dat' matrix;
}
unset out


	Ethan


> 
> Yonghui
> 
> -----Original Message-----
> From: Ethan A Merritt [mailto:eam...@gm...] 
> Sent: Friday, May 17, 2013 12:18 AM
> To: gnu...@li...
> Cc: FortCpp
> Subject: Re: [Gnuplot-info] Plot matrix with GNUplot. Slow
> 
> On Thursday, 16 May 2013, FortCpp wrote:
> > I am using GNUplot for plotting a small matrix. The matrix is 100x100 
> > by size. e.g.
> > 
> > 1.23212 2.43123 -1.24312 ......
> > -4.23123 2.00458 5.60234 ......
> > ......
> > The data is not neatly stored in the file. So from C++ point of view, 
> > due to the lack of length per data, there is no way to load a whole 
> > number, but it has to check when the number is loading. I guess this 
> > should be the reason of the slow plotting speed.
> > 
> > Now I have 3 questions:
> > Q1: Is loading the bottle neck?
> > 
> > Q2: If I can make the data file neatly stored (setw). e.g.
> > 
> >  1.23212  2.43123 -1.24312 ......
> > -4.23123  2.00458  5.60234 ......
> > ......
> > Does the plotting speed get any improvement? (Maybe GNUplot can check 
> > what the pattern is. Thus improve the loading speed. Not sure.)
> 
> No. That won't make any difference.
> 
> > 
> > Q3: Any other options that I can set to make it faster?
> 
> gnuplot> help fpe
> 
>  The `set datafile nofpe_trap` command tells gnuplot not to re-initialize a
> floating point exception handler before every expression evaluation used
> while  reading data from an input file.  This can significantly speed data
> input from  very large files at the risk of program termination if a
> floating-point  exception is generated.
> 
> You haven't shown us the commands you use to read the file, so I don't know
> if this is relevant to your case.
> 
> There is a recent patch in the CVS version that hugely speeds up reading
> binary matrices, but since the matrix you show is in ascii that wouldn't
> help.
> 
> 	Ethan
> 
> 
> --
> Tradition is not the worship of ashes, but the preservation of fire.
>   - Gustav Mahler
> 
> 


-- 
Tradition is not the worship of ashes, but the preservation of fire.
  - Gustav Mahler

Re: [Gnuplot-info] Plot matrix with GNUplot. Slow

[Yonghui <lyh...@gm...>]

Thanks Ethan,

I am actually making a movie. 200 pictures, each picture is the 100x100
matrix. Here is the command:
-----------plot_TDM.gp--------------
set term gif size 640,640 animate delay 10
set out '@movie_TDM.gif'
unset key

set cbrange[-0.01:0.01]
i=0
set pm3d
unset surface
set view map
set palette defined (-0.01 "red", 0 "white", 0.01 "blue")
load "plot_TDM_loop.gp"
unset out
quit

------------plot_TDM_loop.gp"----------------
splot '_TDTDM.dat' matrix ind i*10
print i
i=i+1
if (i<200) reread

Please take a look. Thanks.

Yonghui

-----Original Message-----
From: Ethan A Merritt [mailto:eam...@gm...] 
Sent: Friday, May 17, 2013 12:18 AM
To: gnu...@li...
Cc: FortCpp
Subject: Re: [Gnuplot-info] Plot matrix with GNUplot. Slow

On Thursday, 16 May 2013, FortCpp wrote:
> I am using GNUplot for plotting a small matrix. The matrix is 100x100 
> by size. e.g.
> 
> 1.23212 2.43123 -1.24312 ......
> -4.23123 2.00458 5.60234 ......
> ......
> The data is not neatly stored in the file. So from C++ point of view, 
> due to the lack of length per data, there is no way to load a whole 
> number, but it has to check when the number is loading. I guess this 
> should be the reason of the slow plotting speed.
> 
> Now I have 3 questions:
> Q1: Is loading the bottle neck?
> 
> Q2: If I can make the data file neatly stored (setw). e.g.
> 
>  1.23212  2.43123 -1.24312 ......
> -4.23123  2.00458  5.60234 ......
> ......
> Does the plotting speed get any improvement? (Maybe GNUplot can check 
> what the pattern is. Thus improve the loading speed. Not sure.)

No. That won't make any difference.

> 
> Q3: Any other options that I can set to make it faster?

gnuplot> help fpe

 The `set datafile nofpe_trap` command tells gnuplot not to re-initialize a
floating point exception handler before every expression evaluation used
while  reading data from an input file.  This can significantly speed data
input from  very large files at the risk of program termination if a
floating-point  exception is generated.

You haven't shown us the commands you use to read the file, so I don't know
if this is relevant to your case.

There is a recent patch in the CVS version that hugely speeds up reading
binary matrices, but since the matrix you show is in ascii that wouldn't
help.

	Ethan


--
Tradition is not the worship of ashes, but the preservation of fire.
  - Gustav Mahler

Re: [Gnuplot-info] Plot matrix with GNUplot. Slow

[Ethan A M. <eam...@gm...>]

On Thursday, 16 May 2013, FortCpp wrote:
> I am using GNUplot for plotting a small matrix. The matrix is 100x100 by
> size. e.g.
> 
> 1.23212 2.43123 -1.24312 ......
> -4.23123 2.00458 5.60234 ......
> ......
> The data is not neatly stored in the file. So from C++ point of view, due to
> the lack of length per data, there is no way to load a whole number, but it
> has to check when the number is loading. I guess this should be the reason
> of the slow plotting speed.
> 
> Now I have 3 questions:
> Q1: Is loading the bottle neck?
> 
> Q2: If I can make the data file neatly stored (setw). e.g.
> 
>  1.23212  2.43123 -1.24312 ......
> -4.23123  2.00458  5.60234 ......
> ......
> Does the plotting speed get any improvement? (Maybe GNUplot can check what
> the pattern is. Thus improve the loading speed. Not sure.)

No. That won't make any difference.

> 
> Q3: Any other options that I can set to make it faster?

gnuplot> help fpe

 The `set datafile nofpe_trap` command tells gnuplot not to re-initialize a
 floating point exception handler before every expression evaluation used while
 reading data from an input file.  This can significantly speed data input from
 very large files at the risk of program termination if a floating-point
 exception is generated.

You haven't shown us the commands you use to read the file,
so I don't know if this is relevant to your case.

There is a recent patch in the CVS version that hugely speeds up
reading binary matrices, but since the matrix you show is in 
ascii that wouldn't help.

	Ethan


-- 
Tradition is not the worship of ashes, but the preservation of fire.
  - Gustav Mahler

[Gnuplot-info] Vector plot with time x-axis

[David B. <bro...@fa...>]

Hi,
I am trying to make a plot of wind vs time. I want time on the X axis, 
the Y axis to be the speed and a fixed size vector at each data point 
indicating the wind direction.

The ideal thing would be if I could specify the deltax and deltay size 
of each vector in pixels, or some other screen coordinate independent of 
the x and y ranges. Is this possible?

I haven't been able to find any information about the above so I assume 
I will need to specify deltax as a time and figure out the right 
scaling. However I haven't been able to get this to work, the vectors 
always have zero length in the X dimension. I have:

...
set xdata time
set timefmt "%m/%d-%H:%M"
...
plot 'foo.txt' using 1:2:3:4 with vectors

Where the data file is like this:
05/17-11:00 6.33660511836 -00/00-00:55 -0.35963594262
05/17-14:00 4.52832308033 00/00-00:40 -0.731311736396
05/17-17:00 3.95676205159 00/00-00:59 0.0217798990928

I have tried various formats for the 3rd column but I have been unable 
to figure out how to make the vector plot work with time on the X axis.

I would greatly appreciate any suggestions,
Thanks,
   Dave

[Gnuplot-info] Plot matrix with GNUplot. Slow

[FortCpp <lyh...@gm...>]

I am using GNUplot for plotting a small matrix. The matrix is 100x100 by
size. e.g.

1.23212 2.43123 -1.24312 ......
-4.23123 2.00458 5.60234 ......
......
The data is not neatly stored in the file. So from C++ point of view, due to
the lack of length per data, there is no way to load a whole number, but it
has to check when the number is loading. I guess this should be the reason
of the slow plotting speed.

Now I have 3 questions:
Q1: Is loading the bottle neck?

Q2: If I can make the data file neatly stored (setw). e.g.

 1.23212  2.43123 -1.24312 ......
-4.23123  2.00458  5.60234 ......
......
Does the plotting speed get any improvement? (Maybe GNUplot can check what
the pattern is. Thus improve the loading speed. Not sure.)

Q3: Any other options that I can set to make it faster?

Thanks!



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Re: [Gnuplot-info] Save multiple plots with one gnuplot script

[thse <t.s...@fz...>]

after the 1st 'replot' you are executing the 2nd 'plot' command,
so this plot is written to 'test1.eps' too. afterwards you set output to
'test2.eps', so the 2nd 'replot' writes into 'test2.eps'.

you don't need the 'replot' commands, just plot directly into
the eps-files:

set terminal postscript
set output "test1.eps"
plot "test1" using 1:2
set output "test2.eps"
plot "test2" using 1:2
set output




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Re: [Gnuplot-info] Exceptions from csv-files

[Clement L. <the...@gm...>]

Hello,

One method is to use awk within gnuplot, e.g.:

plot "< awk '{if(NR > minRow && NR < maxRow) { if($1 <= maxVal || $2
>= minVal) {print $0} }}' yourData.dat"

I have to be quite general here because I don't know the specifics of
your data format. awk will take yourData.dat, process it according to
the criteria you stated, and gnuplot will plot the result of awk's
processing.

Also, I've not tested the awk code above, but the general idea should
be correct.

On 16 May 2013 08:45, tk110830 <kie...@we...> wrote:
> Hello,
>
> I have the following problem: I would like to use Gnuplot to make graphs
> from experiment data stored in a csv-file. But I cannot use the whole data
> (adjustment processes are also logged and would compromise the real graph)
> and I cannot have a fix value of line numbers to leave out because the
> adjustment processes take different times. Is there any way to get gnuplot
> to use only lines in specific value ranges and to also leave out the first
> and last few lines of these ranges?
>
> Kind regards
> - TK
>
>
>
> --
> View this message in context: http://gnuplot.10905.n7.nabble.com/Exceptions-from-csv-files-tp17360.html
> Sent from the Gnuplot - User mailing list archive at Nabble.com.
>
> ------------------------------------------------------------------------------
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> efficiently configure, manage, and operate all of your security controls
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> gnuplot-info mailing list
> gnu...@li...
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[Gnuplot-info] Exceptions from csv-files

[tk110830 <kie...@we...>]

Hello,

I have the following problem: I would like to use Gnuplot to make graphs
from experiment data stored in a csv-file. But I cannot use the whole data
(adjustment processes are also logged and would compromise the real graph)
and I cannot have a fix value of line numbers to leave out because the
adjustment processes take different times. Is there any way to get gnuplot
to use only lines in specific value ranges and to also leave out the first
and last few lines of these ranges?

Kind regards
- TK



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Sent from the Gnuplot - User mailing list archive at Nabble.com.

[Gnuplot-info] integer overflow

[Mahmood N. <nt_...@ya...>]

Hi
Sometimes when I zoom in a region of a chart, I get this message in the terminal

integer overflow; change to floating point

At this point, zooming doesn't work and for every right click (to set a region) I get that message.

 
Regards,
Mahmood

Re: [Gnuplot-info] problem plotting with named columns

[Ethan A M. <eam...@gm...>]

On Saturday, 11 May 2013, Ben Elliston wrote:
> After a bit of time to reduce my test case, I've finally worked out
> why I can't get a named column to work in my plotting command.  I
> have:
> 
>   gnuplot> plot 'datafile' every 10::2 using "foo":"bar"
> 
> This errors out with: could not find column with header "foo".  The
> data file is definitely correct: row 1 has "foo" and "bar" headings.
> 
> Am I misunderstanding something or is this a bug?

The "every" filter is being applied before processing the input data.
"every 10::2" tells it to skip the first two lines, so the column headers
are explicitly being filtered out of the input stream.

Is it bug?  Arguably so.  This behaviour was changed as a result of
discussion attached to this bug tracker item #3438848
   https://sourceforge.net/p/gnuplot/bugs/1059/

This change first appeared in release version 4.6.1

When you report a problem, please always provide the version of
gnuplot you are using.  In this case it's not clear whether your
version is newer or older than the fix that resulted from that
bug report.  Perhaps your version is too old to have the fix, or
perhaps you have found a case that the July 2012 change didn't
cover.  If that's the case, please file a new bug report that includes
a set of gnuplot commands that trigger the bug.

	Ethan

> 
> Thanks,
> Ben
-- 
Tradition is not the worship of ashes, but the preservation of fire.
  - Gustav Mahler

[Gnuplot-info] problem plotting with named columns

[Ben E. <bj...@ai...>]

After a bit of time to reduce my test case, I've finally worked out
why I can't get a named column to work in my plotting command.  I
have:

  gnuplot> plot 'datafile' every 10::2 using "foo":"bar"

This errors out with: could not find column with header "foo".  The
data file is definitely correct: row 1 has "foo" and "bar" headings.

Am I misunderstanding something or is this a bug?

Thanks,
Ben

Re: [Gnuplot-info] chart widnow display options

[Mahmood N. <nt_...@ya...>]

Thanks a lot. I switched it off.


 
Regards,
Mahmood



________________________________
 From: Clement Law <the...@gm...>
To: Mahmood Naderan <nt_...@ya...> 
Cc: "gnu...@li..." <gnu...@li...> 
Sent: Saturday, May 11, 2013 12:37 PM
Subject: Re: [Gnuplot-info] chart widnow display options
 

That's called the key. You can get help instructions with 'help set
key' in the gnuplot terminal.

On 11 May 2013 07:54, Mahmood Naderan <nt_...@ya...> wrote:
> Hi
> When I use
>
> plot "data.txt" using 1
>
> in the chart window, I see a text which is actually the option I used
>
> data.txt using 1
>
> How can I remove that? I can not find such display option.
>
>
>
> Regards,
> Mahmood
> ------------------------------------------------------------------------------
> Learn Graph Databases - Download FREE O'Reilly Book
> "Graph Databases" is the definitive new guide to graph databases and
> their applications. This 200-page book is written by three acclaimed
> leaders in the field. The early access version is available now.
> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info

Re: [Gnuplot-info] chart widnow display options

[Clement L. <the...@gm...>]

That's called the key. You can get help instructions with 'help set
key' in the gnuplot terminal.

On 11 May 2013 07:54, Mahmood Naderan <nt_...@ya...> wrote:
> Hi
> When I use
>
> plot "data.txt" using 1
>
> in the chart window, I see a text which is actually the option I used
>
> data.txt using 1
>
> How can I remove that? I can not find such display option.
>
>
>
> Regards,
> Mahmood
> ------------------------------------------------------------------------------
> Learn Graph Databases - Download FREE O'Reilly Book
> "Graph Databases" is the definitive new guide to graph databases and
> their applications. This 200-page book is written by three acclaimed
> leaders in the field. The early access version is available now.
> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info

[Gnuplot-info] chart widnow display options

[Mahmood N. <nt_...@ya...>]

Hi
When I use 

plot "data.txt" using 1

in the chart window, I see a text which is actually the option I used 

data.txt using 1

How can I remove that? I can not find such display option.


 
Regards,
Mahmood

Re: [Gnuplot-info] multiple data files in one instance of gnuplot

[Mahmood N. <nt_...@ya...>]

Thanks a lot. Now I can understand what does the manual say.
As Ethan stated earlier, I had to define a terminal and bind the plot to that terminal as many as I want.

 
Regards,
Mahmood



________________________________
 From: Clement Law <the...@gm...>
To: Ethan Merritt <eam...@gm...> 
Cc: "gnu...@li..." <gnu...@li...>; Mahmood Naderan <nt_...@ya...> 
Sent: Thursday, May 9, 2013 7:15 PM
Subject: Re: [Gnuplot-info] multiple data files in one instance of gnuplot
 

Its worth pointing out that help set term wxt will produce this
paragraph near the beginning:

"The active plot window (the one selected by `set term wxt <n>`) is
interactive. Its behaviour is shared with other terminal types. See `mouse`
for details. It also has some extra icons, which are supposed to be
self-explanatory."

Hope that helps,

Clem

On 9 May 2013 15:25, Ethan Merritt <eam...@gm...> wrote:
> On Thursday, 09 May 2013, Mahmood Naderan wrote:
>> Hi
>> I have two *data files* and want to open them with one instance of gnuplot. Both of the files are single columned. If I run this command:
>>
>> plot "data1.txt" using 1
>> plot "data2.txt" using 1
>>
>> The result is that the second will replace the first one. The naiive solution is to open another terminal and plot the second one.
>> What I want is this sequence
>>
>> plot "data1.txt" using 1
>> <first chart is opened in a new window and the console returns to gnuplot>
>> plot "data2.txt" using 1
>> <second chart is opened in a new window and the console returns to gnuplot>
>
> set term wxt 1
> plot 'data1.txt' using 0:1
> set term wxt 2
> plot 'data2.txt' using 0:1
>
> Or x11 or qt depending on what terminal type you are using.
>
>
>
>>
>> As a result I have to chart windows in one gnuplot.
>>
>>
>> Searching the documents and internet, there are examples for a single data file with two columns. So it is easy to open two chart windows in one gnuplot. But that is not my case.
>>
>> Is there any way to do that?
>>
>>
>> Regards,
>> Mahmood
>> ------------------------------------------------------------------------------
>> Learn Graph Databases - Download FREE O'Reilly Book
>> "Graph Databases" is the definitive new guide to graph databases and
>> their applications. This 200-page book is written by three acclaimed
>> leaders in the field. The early access version is available now.
>> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
>> _______________________________________________
>> gnuplot-info mailing list
>> gnu...@li...
>> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
>>
>
>
> ------------------------------------------------------------------------------
> Learn Graph Databases - Download FREE O'Reilly Book
> "Graph Databases" is the definitive new guide to graph databases and
> their applications. This 200-page book is written by three acclaimed
> leaders in the field. The early access version is available now.
> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info

Re: [Gnuplot-info] multiple data files in one instance of gnuplot

[Clement L. <the...@gm...>]

Its worth pointing out that help set term wxt will produce this
paragraph near the beginning:

"The active plot window (the one selected by `set term wxt <n>`) is
 interactive. Its behaviour is shared with other terminal types. See `mouse`
 for details. It also has some extra icons, which are supposed to be
 self-explanatory."

Hope that helps,

Clem

On 9 May 2013 15:25, Ethan Merritt <eam...@gm...> wrote:
> On Thursday, 09 May 2013, Mahmood Naderan wrote:
>> Hi
>> I have two *data files* and want to open them with one instance of gnuplot. Both of the files are single columned. If I run this command:
>>
>> plot "data1.txt" using 1
>> plot "data2.txt" using 1
>>
>> The result is that the second will replace the first one. The naiive solution is to open another terminal and plot the second one.
>> What I want is this sequence
>>
>> plot "data1.txt" using 1
>> <first chart is opened in a new window and the console returns to gnuplot>
>> plot "data2.txt" using 1
>> <second chart is opened in a new window and the console returns to gnuplot>
>
> set term wxt 1
> plot 'data1.txt' using 0:1
> set term wxt 2
> plot 'data2.txt' using 0:1
>
> Or x11 or qt depending on what terminal type you are using.
>
>
>
>>
>> As a result I have to chart windows in one gnuplot.
>>
>>
>> Searching the documents and internet, there are examples for a single data file with two columns. So it is easy to open two chart windows in one gnuplot. But that is not my case.
>>
>> Is there any way to do that?
>>
>>
>> Regards,
>> Mahmood
>> ------------------------------------------------------------------------------
>> Learn Graph Databases - Download FREE O'Reilly Book
>> "Graph Databases" is the definitive new guide to graph databases and
>> their applications. This 200-page book is written by three acclaimed
>> leaders in the field. The early access version is available now.
>> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
>> _______________________________________________
>> gnuplot-info mailing list
>> gnu...@li...
>> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
>>
>
>
> ------------------------------------------------------------------------------
> Learn Graph Databases - Download FREE O'Reilly Book
> "Graph Databases" is the definitive new guide to graph databases and
> their applications. This 200-page book is written by three acclaimed
> leaders in the field. The early access version is available now.
> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info

Re: [Gnuplot-info] multiple data files in one instance of gnuplot

[Ethan M. <eam...@gm...>]

On Thursday, 09 May 2013, Mahmood Naderan wrote:
> Hi
> I have two *data files* and want to open them with one instance of gnuplot. Both of the files are single columned. If I run this command:
> 
> plot "data1.txt" using 1
> plot "data2.txt" using 1
>  
> The result is that the second will replace the first one. The naiive solution is to open another terminal and plot the second one.
> What I want is this sequence
> 
> plot "data1.txt" using 1
> <first chart is opened in a new window and the console returns to gnuplot>
> plot "data2.txt" using 1
> <second chart is opened in a new window and the console returns to gnuplot>

set term wxt 1
plot 'data1.txt' using 0:1
set term wxt 2
plot 'data2.txt' using 0:1

Or x11 or qt depending on what terminal type you are using.



> 
> As a result I have to chart windows in one gnuplot.
> 
> 
> Searching the documents and internet, there are examples for a single data file with two columns. So it is easy to open two chart windows in one gnuplot. But that is not my case.
> 
> Is there any way to do that?
> 
> 
> Regards,
> Mahmood
> ------------------------------------------------------------------------------
> Learn Graph Databases - Download FREE O'Reilly Book
> "Graph Databases" is the definitive new guide to graph databases and 
> their applications. This 200-page book is written by three acclaimed 
> leaders in the field. The early access version is available now. 
> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> 

Re: [Gnuplot-info] multiple data files in one instance of gnuplot

[Mahmood N. <nt_...@ya...>]

The data files look like

$ cat data.txt 
0
10
20
30
40
50

$ cat data2.txt 
100
80
60
40

Now, when I run 

plot "data.txt" using 1, "data2.txt" u 2




The points for data2.txt are not shown correctly.Please see the attachment.
 
Regards,
Mahmood



________________________________
 From: Marek W. Gutowski <gu...@if...>
To: Mahmood Naderan <nt_...@ya...> 
Sent: Thursday, May 9, 2013 5:18 PM
Subject: Re: [Gnuplot-info] multiple data files in one instance of gnuplot
 

Is the command like:

gnuplot> plot "data1.txt" using 1, "data2.txt" u 2

what you need?  It plots two data sets in the same window.

Cheers,
Marek

Mahmood Naderan wrote:
> Hi
> I have two *data files* and want to open them with one instance of gnuplot. Both of the files are single columned. If I run this command:
>
> plot "data1.txt" using 1
> plot "data2.txt" using 1
>
> The result is that the second will replace the first one. The naiive solution is to open another terminal and plot the second one.
> What I want is this sequence
>
> plot "data1.txt" using 1
> <first chart is opened in a new window and the console returns to gnuplot>
> plot "data2.txt" using 1
> <second chart is opened in a new window and the console returns to gnuplot>
>
> As a result I have to chart windows in one gnuplot.
>
>
> Searching the documents and internet, there are examples for a single data file with two columns. So it is easy to open two chart windows in one gnuplot. But that is not my case.
>
> Is there any way to do that?
>
>
> Regards,
> Mahmood

-- 
Marek W. Gutowski
Institute of Physics PAS, ON-3.2, Al. Lotnikow 32/46
02-668 Warszawa, Poland, tel. +48-22-228436601 ext. 3122
== To talk or not to talk?  Yes, talk, plain ASCII please ==
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[Gnuplot-info] multiple data files in one instance of gnuplot

[Mahmood N. <nt_...@ya...>]

Hi
I have two *data files* and want to open them with one instance of gnuplot. Both of the files are single columned. If I run this command:

plot "data1.txt" using 1
plot "data2.txt" using 1
 
The result is that the second will replace the first one. The naiive solution is to open another terminal and plot the second one.
What I want is this sequence

plot "data1.txt" using 1
<first chart is opened in a new window and the console returns to gnuplot>
plot "data2.txt" using 1
<second chart is opened in a new window and the console returns to gnuplot>

As a result I have to chart windows in one gnuplot.


Searching the documents and internet, there are examples for a single data file with two columns. So it is easy to open two chart windows in one gnuplot. But that is not my case.

Is there any way to do that?


Regards,
Mahmood

Re: [Gnuplot-info] reading from a zip file

[Mahmood N. <nt_...@ya...>]

OK the problem was that I used tar.gz and NOT gz (gzip utility).
It is now fine.

 
Regards,
Mahmood



________________________________
 From: Mahmood Naderan <nt_...@ya...>
To: "EAM...@gm..." <EAM...@gm...>; "gnu...@li..." <gnu...@li...> 
Sent: Thursday, May 9, 2013 1:09 PM
Subject: Re: [Gnuplot-info] reading from a zip file
 

It doesn't work for me. You can create a data file and paste

10
20
30
40
50

now these two commands generates different plots

gnuplot> plot "data.txt" using 1
gnuplot> plot "<zcat data.tar.gz" using 1

and 


gnuplot> plot "<zcat data.tar.gz" using 1:2
                                           ^
         x range is invalid



 
Regards,
Mahmood



________________________________
From: Ethan A Merritt <eam...@gm...>
To: gnu...@li...; Mahmood Naderan <nt_...@ya...> 
Cc: Roman Dzvinkovsky <rom...@gm...> 
Sent: Thursday, May 9, 2013 10:25 AM
Subject: Re: [Gnuplot-info] reading from a zip file


On Wednesday, 08 May 2013, Roman Dzvinkovsky wrote:
> You can use named pipes (https://en.wikipedia.org/wiki/Named_pipe).
> 
> On *nix it is easy:
> % mkfifo input
> % gunzip -c input.gz >input &
> [2] 2379
> % gnuplot myplot.gp >out.png
> [2]  + done       gunzip -c input.gz > input
> 
> You'll need to write data into pipe as many times as you plot it in your
> script.

It's even easier than that.  
The pipe can be implicit in the plot command give to gnuplot:
   gnuplot>  plot "<zcat input.gz" using 1:2

    Ethan

> 
> 
> 2013/5/9 Mahmood Naderan <nt_...@ya...>
> 
> > Hi
> > It seems that ghbplot can not read data from a compressed archive (gz,
> > bzip2, ...).
> >
> > If that is true, there is there any tweak for that or it can read from
> > plain text only?
> >
> >
> >
> > Regards,
> > Mahmood
-- 
Tradition is not the worship of ashes, but the preservation of fire.
  - Gustav Mahler
------------------------------------------------------------------------------
Learn Graph Databases - Download FREE O'Reilly Book
"Graph Databases" is the definitive new guide to graph databases and 
their applications. This 200-page book is written by three acclaimed 
leaders in the field. The early access version is available now. 
Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
_______________________________________________
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