gnuplot-info — For questions and discussion about gnuplot

[Gnuplot-info] Font size

[Zbigniew K. <cbl...@gm...>]

Hello,

I have a problem when I increase font size. I need font size larger, because I 
include such kind of plot to Latex article and then the font is not readable, 
because is to small. How to resolve this problem, because when I increase font 
size the ztics (but often also xtics and ytics) and also xlabel are 
overlapping - see on these in attached files and code?


set terminal pdf enhanced
set nokey
set style fill transparent
set surface
set hidden3d
set xyplane at 0

set style line 1 linetype -1 linewidth 2  linecolor rgb 'black'
set style line 2 linetype 0 linewidth 1 pointtype 0

set grid xtics ytics ztics back linestyle 2

set border 895 back linetype -1 linewidth 1
set autoscale fix

set tics border out font ",14"

set xlabel "x" font ",18"
set ylabel "y" font ",18"
set title "test"

set output "figure.pdf"

set xrange [0:9]
set yrange [0:7]

splot "data.dat" \
    binary \
    format="%int16%int16%float64" \
    record=10x11 \
    index 0 \
    using 1:2:3 \
    with lines \
    linestyle 1


How to write proper code to avoid overlapping, when increase font size?
Thank you in advance.

[Gnuplot-info] How to vary color within one text label?

[Mikhail K. <mko...@gm...>]

Hi guys.

i would like to have something like this in my plot title (or in my 
cblabel definition):

set title "A nice plot title. positive values <-[typed in red color] 
mean this, negative values <-[typed in blue color] mean that."

blue and read are margins of color palette of a pm3d surface plot.

is it possible somehow ?

Misha.

Re: [Gnuplot-info] flipping image

[<she...@be...>]

>> I am using the following code to plot an ascii image file:
>> ...
>> The image lloks fine except for being upside down. How can I flip it?
>
> set xrange [*:*] reverse
>
>

The up-down flip uses yrange rather than xrange but it works now. Thank
you very much!

Re: [Gnuplot-info] flipping image

[Tait <gnu...@t4...>]

> I am using the following code to plot an ascii image file:
> ...
> The image lloks fine except for being upside down. How can I flip it?

set xrange [*:*] reverse

[Gnuplot-info] flipping image

[<she...@be...>]

Hello Gnuplotteers

I am using the following code to plot an ascii image file:

unset key
set size square
set tics out
set palette gray
unset border
unset xtics
unset ytics
unset colorbox
plot 'tSNR_file.dat' matrix with image


The image lloks fine except for being upside down. How can I flip it?

Thank you

Re: [Gnuplot-info] How to set xtics for own labels

[Ates80 <bar...@un...>]

Hi Thomas,

thank u for your answer. With this script gnuplot is 'only' writing the
first xtic label. And i also didn't understand what u have done, can u
explain your script a bit please.
One more question is: Is there also a possibility that gnuplot will display
all others when i zoom in like it is in default done by gnuplot when it sets
the xtics self?

Thanks


Thomas Sefzick wrote:
> 
> plot twice (1st plot to construct the 'set xtics' command):
> 
> set macro
> set style data histogram
> set style histogram cluster gap 1
> set style fill solid
> set boxwidth 1.0
> set xtic rotate by -45
> set table
> a="set xtics ("
> plot "datafile" using ( \
>    int($0)%100==0&&int($0)>0?a=a.",":0 , \
>    int($0)%100==0?a=a."\"".stringcolumn(1)."\" ".stringcolumn(0):0 , \
>    $2 \
> )
> a=a.")"
> print a
> @a
> unset table
> plot "datafile" using 2 title "test"
> 
> 
> Ates80 wrote:
>> 
>> Hi all,
>> 
>> i hope someone can help me. I have the following problem and could not
>> find a solution for that in the forum yet.
>> I want to plot my data file with histograms and my own xtic labels and i
>> have about 1000 rows. So if i plot my xaxes labels  become unclear
>> because of the amount of rows. I could set the xtics increment to e.g 100
>> with "set xtics 100" but this doesn't work when i'm using my own labels.
>> How can i tell gnuplot that he shall only set every e.g. 100th label?
>> 
>> My data file looks like this:
>> #range(as string)   number
>> 0-100                   90
>> 100-200               80
>> 200-300               70
>> 300-400               20
>> ...
>> 
>> And my script is like that so far:
>> reset
>> set title "my histogram result"
>> set yrange [0:700]
>> set style data histogram
>> set style histogram cluster gap 1
>> set style fill solid
>> set boxwidth 0.9
>> set xtic rotate by -45
>> set xtics 100
>> plot "datafile" u 2:xtic(1) t 'test'
>> 
>> 
> 
> 

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Re: [Gnuplot-info] How to set xtics for own labels

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

plot twice (1st plot to construct the 'set xtics' command):

set macro
set style data histogram
set style histogram cluster gap 1
set style fill solid
set boxwidth 1.0
set xtic rotate by -45
set table
a="set xtics ("
plot "datafile" using ( \
   int($0)%100==0&&int($0)>0?a=a.",":0 , \
   int($0)%100==0?a=a."\"".stringcolumn(1)."\" ".stringcolumn(0):0 , \
   $2 \
)
a=a.")"
print a
@a
unset table
plot "datafile" using 2 title "test"


Ates80 wrote:
> 
> Hi all,
> 
> i hope someone can help me. I have the following problem and could not
> find a solution for that in the forum yet.
> I want to plot my data file with histograms and my own xtic labels and i
> have about 1000 rows. So if i plot my xaxes labels  become unclear because
> of the amount of rows. I could set the xtics increment to e.g 100 with
> "set xtics 100" but this doesn't work when i'm using my own labels. How
> can i tell gnuplot that he shall only set every e.g. 100th label?
> 
> My data file looks like this:
> #range(as string)   number
> 0-100                   90
> 100-200               80
> 200-300               70
> 300-400               20
> ...
> 
> And my script is like that so far:
> reset
> set title "my histogram result"
> set yrange [0:700]
> set style data histogram
> set style histogram cluster gap 1
> set style fill solid
> set boxwidth 0.9
> set xtic rotate by -45
> set xtics 100
> plot "datafile" u 2:xtic(1) t 'test'
> 
> 

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Re: [Gnuplot-info] datafile: multiple y-axis data but with gaps in some collumns?

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

use
set datafile missing "<string>"
and put the string or character (depends on what you have chosen
for <string>) at the no-data locations in your datafile.
e.g.:

set data file missing "?"

# x-axis     y-axis1     y-axis2     y-axis3
0     1     ?    23
1     3    31    32
2     5    45
3     ?    23
4     ?    49
5    10    12
6    15
7


frank007 wrote:
> 
> Hi i need help, iam having a datafile including multible pairs of data (it
> is just one collumn for the x-axis but multiple collumns for y-axis data
> using the same x-axis). Plotting is no problem in general, but i have a
> special situation now with gaps in some of the y-axis data which results
> in gnuplot plotting data from another collumn because of the gap. Here is
> a example
> datafile:
> # x-axis     y-axis1     y-axis2     y-axis3
> 0               1                              23
> 1               3              31            32
> 2               5              45
> 3                               23
> 4                               49
> 5              10             12
> 6              15
> 7
> 
> is there a blank symbol i can put into the empty parts of one collumns to
> keep gnuplot from using the data from the neighbouring collumns?
> 

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Re: [Gnuplot-info] to draw 3D landscape

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

On 01.08.2011 08:47, ramya narasimhan wrote:
> I tried to draw the landscape using splot with pm3d. But the plot I got
> is unlike the one I expected.

Of course it is.  But that's what you get if you misrepresent what it is 
you actually wanted by that wide a margin.  There was no mention of you 
trying to imitate a specific plot in your original question.

> I have attached the sample of the figure
> which is made using matlab6.5. I want to reproduce it by using gnuplot.

So have a look at the collection of demos that come with the program.

Re: [Gnuplot-info] How to get a radial plot using gnu-plot?

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

does the following script do what you are searching for?

set polar
set angles degrees
set size square
set grid polar
set xrange [-12000:12000]
set yrange [-12000:12000]
set rrange [-6000:6000]
set rtics 2000
plot "-" with linespoints, "" with linespoints
0 -3400
60 -5300
120 -4700
180 -3800
240 -4100
300 -3100
360 -3400
e
0 3400
60 5300
120 4700
180 3800
240 4100
300 3100
360 3400
e


Divya Thumsi wrote:
> 
>  http://old.nabble.com/file/p32138126/ex.jpg 
>  http://old.nabble.com/file/p32138126/env_plot.jpg 
> 
> How to get such plots using gnu-plot? Is it possible to put both positive
> and negative values in the same plot? Kindly Help!
> 

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Re: [Gnuplot-info] GNUPLOT 3d lines

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

rearrange your data and 'splot' it:

splot "-" with linespoints
1 9 9
2 8 1
3 7 8
4 6 2
5 5 5
e


gnuplotnewb123 wrote:
> 
> hello gnuplot forum,
> 
> I have just recently begun to use gnuplot in the hopes that I can plot my
> data without having to buy software. I have seen gnuplot plot meshes and
> skins in 3d, but I cannot figure out how to plot my own data. I want to
> plot lines in 3d space according to matrices i.e. given matrix x1=[1, 2,
> 3, 4, 5] matrix y1=[9, 8, 7, 6, 5] and matrix z1= [9, 1, 8, 2, 5] how do i
> plot x1, y1, z1?
> my end goal is to have four intersecting lines defined by the points in
> these matrices in one 3d graph with no skins or meshes in the graph.
> 
> how should i go about this?
> thanks
> 

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Re: [Gnuplot-info] fiting exponential does not match

[terriblement <ric...@gm...>]

Thank you !

I tried what you said, and the curve had a too big offset, so I've put
c=100.
Now it fits good although the values between 25 and 65 are not perfect; I
think there is nothing to do.

(f(x) = 14.2169 * exp(0.0486079*x) + 100) 

(sorry if I don't respect the Quote rules, I haven't understood them I
think)



Thomas Sefzick wrote:
> 
> your fit parameters are not independent:
> 
> 'c', which is used to compensate an 'offset', depends on 'a',
> because
> a*exp(0) = a*1
> which means that 'c+a' should be '116'.
> 
> you could set 'c' to 116, 'a' and 'b' to some reasonable
> value (e.g. a=1, b=0.02) and fit 'via a,b', adjust 'c' and
> fit again.
> 
> 
> terriblement wrote:
>> 
>> Hi everybody,
>> 
>> I have a txt file with some values, and I want to fit a curve with my
>> values...(see attached file)
>> 
>>  http://old.nabble.com/file/p32115817/test.txt test.txt 
>> 
>> it looks like an exponential function, so I'Ve tried this :
>> 
>> f(x) = a* exp (b*x) + c
>> c = 116
>> fit f(x) "test.txt" using 1:2 via a,b,c
>> 
>> and the values are totally wrong :s
>> I don't understand what I'm doing wrong, if somebody could help me (I'm
>> noob with gnuplot)
>> 
>> thanks a lot.
>> 
> 
> 
:clap:
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[Gnuplot-info] (no subject)

[chris 1k <ric...@gm...>]

ric...@gm...

Re: [Gnuplot-info] to draw 3D landscape

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

On 24.07.2011 15:43, ramya narasimhan wrote:

> I have discrete values for X,Y and Z. First and second principal
> coordinates are in the X, Y axis and energy is in the Z axis. I want
> to plot 3D landscape for these values using splot. Can anyone help me
> to solve this problem?

The manual should do just fine.

[Gnuplot-info] to draw 3D landscape

[ramya n. <ram...@ya...>]

I have discrete values for X,Y and Z. First and second principal coordinates are in the X, Y axis and energy is in the Z axis. I want to plot 3D landscape for these values using splot. Can anyone help me to solve this problem? 

Thanks in advance for any help 
Varsharamya

Re: [Gnuplot-info] Write letters instead of numbers on y-axis

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

assuming that 'a', 's', and 'z' are the only states, you could read
the y-values in using 'stringcolumn' and test for specific letters:

set yrange [0:4]
set ytics ("a" 1, "s" 2, "z" 3)
plot "datafilename" using
1:(strstrt(stringcolumn(2),"a")?1.0:(strstrt(stringcolumn(2),"s")?2.0:3.0))
with linespoints, "" using
1:(strstrt(stringcolumn(3),"a")?1.0:(strstrt(stringcolumn(3),"s")?2.0:3.0))
with linespoints


Nfjord wrote:
> 
> Dear all,
> 
> I would like to plot data from a file but the data for the y-axis are
> letters. My data file looks like:
> 
> 1 a z
> 2 a a
> 3 z s
> 4 s s
> 5 s a
> 
> Column 1 = time (used for x-axis)
> Column 2 = current state of object 1
> Column 3 = current state of object 2
> 
> I want to plot the state of the objects versus time, i.e. I want that the
> values of the y-axis are "a", "s", and "z".The problem is that the states
> are letters, not numbers. How can I do to plot this kind of data please?
> 

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Re: [Gnuplot-info] fiting exponential does not match

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

your fit parameters are not independent:

'c', which is used to compensate an 'offset', depends on 'a',
because
a*exp(0) = a*1
which means that 'c+a' should be '116'.

you could set 'c' to 116, 'a' and 'b' to some reasonable
value (e.g. a=1, b=0.02) and fit 'via a,b', adjust 'c' and
fit again.


terriblement wrote:
> 
> Hi everybody,
> 
> I have a txt file with some values, and I want to fit a curve with my
> values...(see attached file)
> 
>  http://old.nabble.com/file/p32115817/test.txt test.txt 
> 
> it looks like an exponential function, so I'Ve tried this :
> 
> f(x) = a* exp (b*x) + c
> c = 116
> fit f(x) "test.txt" using 1:2 via a,b,c
> 
> and the values are totally wrong :s
> I don't understand what I'm doing wrong, if somebody could help me (I'm
> noob with gnuplot)
> 
> thanks a lot.
> 

-- 
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Re: [Gnuplot-info] cvs version failed to compile.

[Tatsuro M. <tma...@ya...>]

Hello

Your information is not enough to comment on the post. 

Can you search 'lua' in config.log and show the description around there?

In my cygwin build, it is

************
configure:10184: checking for LUA
configure:10192: $PKG_CONFIG --exists --print-errors "lua"
configure:10195: $? = 0
configure:10210: $PKG_CONFIG --exists --print-errors "lua"
configure:10213: $? = 0
configure:10251: result: yes
configure:10330: checking lua.h usability
configure:10330: gcc -shared-libgcc -c -O3 -fomit-frame-pointer   -I/usr/local/include   conftest.c >&5
configure:10330: $? = 0
configure:10330: result: yes
configure:10330: checking lua.h presence
configure:10330: gcc -shared-libgcc -E   -I/usr/local/include   conftest.c
configure:10330: $? = 0
configure:10330: result: yes
configure:10330: checking for lua.h
configure:10330: result: yes
************

Regards

Tatsuro

--- On Fri, 2011/7/22, Hongyi Zhao wrote:

> Hi all,
> 
> I use the following commands to build the cvs version of gnuplot:
> 
> werner@debian:~/gnuplot$ export
> CVSROOT=:pserver:ano...@gn...:/cvsroot/gnuplot
> werner@debian:~/gnuplot$ cvs login
> werner@debian:~/gnuplot$ cvs -z3 checkout gnuplot
> werner@debian:~/gnuplot$ cd gnuplot/
> werner@debian:~/gnuplot$ ./prepare
> werner@debian:~/gnuplot$ ./configure --prefix=/usr --with-readline=gnu
> werner@debian:~/gnuplot$ sudo make install
> 
> At this step, I meet the following errors:
> 
> --------
> In file included from term.h:435:0,
>                   from term.c:1383:
> ../term/lua.trm:109:17: fatal error: lua.h: No such file or directory
> compilation terminated.
> make[2]: *** [term.o] Error 1
> make[2]: Leaving directory `/home/werner/gnuplot/src'
> make[1]: *** [install-recursive] Error 1
> make[1]: Leaving directory `/home/werner/gnuplot/src'
> make: *** [install-recursive] Error 1
> -------------
> 
> Any hints?
> -- 
> Hongyi Zhao <hon...@gm...>
> Institute of Semiconductors, Chinese Academy of Sciences
> GnuPG DSA: 0xD108493
> 
> ------------------------------------------------------------------------------
> 10 Tips for Better Web Security
> Learn 10 ways to better secure your business today. Topics covered include:
> Web security, SSL, hacker attacks & Denial of Service (DoS), private keys,
> security Microsoft Exchange, secure Instant Messaging, and much more.
> http://www.accelacomm.com/jaw/sfnl/114/51426210/
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> 

[Gnuplot-info] xlabel font newhistogram

[abalone <ad...@le...>]

hi, i am having a hard time to modify the font size for the xlabel in
columnstacked histograms. for histogram #8 in this example
http://gnuplot.sourceforge.net/demo_4.3/histograms.html what i would like to
change is the font and position for "Northern Europe", "Southern Europe",...
if i add a 'xlabel' ("Same plot using....) with font set it affect just this
part. If i add an offset it takes with it also the labels of the single
histogram-parts. How can i get better control over them?

thanks!!
abalone.
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[Gnuplot-info] cvs version failed to compile.

[Hongyi Z. <hon...@gm...>]

Hi all,

I use the following commands to build the cvs version of gnuplot:

werner@debian:~/gnuplot$ export
CVSROOT=:pserver:ano...@gn...:/cvsroot/gnuplot
werner@debian:~/gnuplot$ cvs login
werner@debian:~/gnuplot$ cvs -z3 checkout gnuplot
werner@debian:~/gnuplot$ cd gnuplot/
werner@debian:~/gnuplot$ ./prepare
werner@debian:~/gnuplot$ ./configure --prefix=/usr --with-readline=gnu
werner@debian:~/gnuplot$ sudo make install

At this step, I meet the following errors:

--------
In file included from term.h:435:0,
                  from term.c:1383:
../term/lua.trm:109:17: fatal error: lua.h: No such file or directory
compilation terminated.
make[2]: *** [term.o] Error 1
make[2]: Leaving directory `/home/werner/gnuplot/src'
make[1]: *** [install-recursive] Error 1
make[1]: Leaving directory `/home/werner/gnuplot/src'
make: *** [install-recursive] Error 1
-------------

Any hints?
-- 
Hongyi Zhao <hon...@gm...>
Institute of Semiconductors, Chinese Academy of Sciences
GnuPG DSA: 0xD108493

[Gnuplot-info] Regarding standard error

[mannu j. <man...@re...>]

Dear all,



Can anyone tell me that when we used to do some function fit on some data point (stored as a 2 column file) through some constants then after several iterations it is giving final value of those constants with standard error like +/- 0.001264 (2.146 %). What does this error mean, it represents which kind of error (is it showing standard deviation) and what does this percentage and +/- error mean?



Thanks 

Re: [Gnuplot-info] plot iteration - point and line style

[BBands <bb...@gm...>]

On Wed, Jul 20, 2011 at 9:46 AM, Andreas Herrmann
<and...@st...> wrote:
> Using the following code I don't have to specify anything style related
> in the plot line.
>
>    set style line 1 lw 4 ps 2 pt 5 lc rgb "red"
>    set style line 2 lw 4 ps 2 pt 7 lc rgb "blue"
>    set style line 3 lw 4 ps 2 pt 9 lc rgb "orange"
>    set style line 4 lw 4 ps 2 pt 11 lc rgb "web-green"
>    set style line 5 lw 4 ps 2 pt 13 lc rgb "purple"
>    set style line 6 lw 4 ps 2 pt 15 lc rgb "brown"
>    set style data yerrorlines
>    set style increment user

Without the error lines, that is exactly how I control my line styles
now. I don't know who coded this or when it was introduced (4.2.4?),
but I sure do like it, so a hearty thanks to all our wonderful
developers.

     John

PS The home page www.gnuplot.info seems to be down this AM, but the
rest of the site is there.

Re: [Gnuplot-info] plot iteration - point and line style

[Andreas H. <and...@st...>]

On Wed, 2011-07-20 at 08:53 -0700, BBands wrote:
>  Example:
> 
>        set style line 1 lw 2 lc rgb "gold"
>        set style line 2 lw 2 lc rgb "purple"
>        set style line 4 lw 1 lc rgb "sea-green"
>        set style increment user
> 
>        plot f1(x), f2(x), f3(x), f4(x)
> """
> 
> That should get you going with your line color issue.
> 
>     John - who beat his head on this for quite a while

Thank you very much, John.
Using the following code I don't have to specify anything style related
in the plot line.

    set style line 1 lw 4 ps 2 pt 5 lc rgb "red"
    set style line 2 lw 4 ps 2 pt 7 lc rgb "blue"
    set style line 3 lw 4 ps 2 pt 9 lc rgb "orange"
    set style line 4 lw 4 ps 2 pt 11 lc rgb "web-green"
    set style line 5 lw 4 ps 2 pt 13 lc rgb "purple"
    set style line 6 lw 4 ps 2 pt 15 lc rgb "brown"
    set style data yerrorlines
    set style increment user

Best regards,

Andreas

Re: [Gnuplot-info] plot iteration - point and line style

[BBands <bb...@gm...>]

Andreas,

>From 'help set style line"
"""
Linestyles created by this mechanism do not replace the default linetype
styles; both may be used.  If you want plots to use the defined styles in
preference to the default linetypes, please see `set style increment`.
"""

and

"""
gnuplot> help set style increment
 Syntax:
       set style increment {default|userstyles}
       show style increment

 By default, successive plots within the same graph will use successive
 linetypes from the default set for the current terminal type.
 However, choosing `set style increment user` allows you to step through
 the user-defined line styles rather than through the default linetypes.

 Example:

       set style line 1 lw 2 lc rgb "gold"
       set style line 2 lw 2 lc rgb "purple"
       set style line 4 lw 1 lc rgb "sea-green"
       set style increment user

       plot f1(x), f2(x), f3(x), f4(x)
"""

That should get you going with your line color issue.

    John - who beat his head on this for quite a while

[Gnuplot-info] plot iteration - point and line style

[Andreas H. <and...@st...>]

Hello everyone.

I'm plotting data from different data files using the iteration
mechanism. Currently my gnuplot script contains the following code:

    set terminal epslatex color solid

    set arrow from 0.365,0.2 to 0.365,0.0  # V=5
    set arrow from 0.236,0.2 to 0.236,0.0  # V=7

    plot [0:0.4] [0:1.1] \
      for [V in "0 1 2 3 5 7 "] 'V'.V.'.dat' \
        using ($1**(1/3.)):7:8 w yerrorlines lw 3 ps 2

Unfortunately, the V=7 lines has yellow color which is barely visible.
Is there a way to change this lines' color without changing the other
lines?
I already tried `set style line 6 lc rgb "brown"` but this didn't affect
my plot at all. Furthermore, I would like to use filled point styles
only. E.g. filled triangle, circle, square, etc.. How can I specify
different point styles for each plot?

I have another plot which uses iterations, too. However, in that case
the iteration variable contains values like "1e-3". Therefore I'm afraid
I cannot just use the iteration variable to specify the line style in
the plot command.

Some things that came to mind I don't know how to implement, or whether
they are even possible:

Can I iterate an additional counter in the for loop? Something along the
lines of `plot for [V in "0 1 2 ..."; i = 1:6] ... linestyle i`.

Does gnuplot support arrays?
Then I could do `plot for [i = 1:6] files[i] w yerrorlines linestyle i`.

Thanks for your help.

Best regards,

Andreas