gnuplot-py-users — A mailing list for the users of Gnuplot.py.

[Gnuplot-py-users] Hodograph point labels.

[Tyler C. <trc...@gm...>]

Hello I'm trying to plot hodographs slmlar to this so far i have drawn
the points and lines just fine but have ran into some issues labeling
the points.

here is an example of what I'm looking for.

http://www.tornadohead.com/eventhodos/050403top18.gif

When i try and use this to draw the labels that aren't tied to the
points it works but its not in polar coords? even tho the chart is.

for x,y in zip(dir,speed):
	xrad = math.radians(x)
	g('set label "%d %d" at %d,%d' % (x,y,x,y))

also i need to figure out how to label points with a height.

so far i have this it plots the a sample of lines and points but the
labels are all wrong i cant seem to find anything on the net about
this.

Tyler.


from numpy import *
import Gnuplot, Gnuplot.funcutils
import math

# in deg / speed
dir = 180,90,270
speed = 88,29,55


out = []

for x,y in zip(dir,speed):
	xrad = math.radians(x)
	out.append([xrad,y])


plot1 = Gnuplot.PlotItems.Data(out, with_="lines", title="Quadratic")
plot2 = Gnuplot.PlotItems.Data(out, with_="points", title="G00se")


# Plot with GNUPLOT
g = Gnuplot.Gnuplot(debug=1)

g('set terminal png')
g('set output "output.png"')
g('set size square')
g('set xrange [-100:100]')
g('set yrange [-100:100]')
g('set polar')
g('set grid polar')
g('set size ratio -1')
for x,y in zip(dir,speed):
	xrad = math.radians(x)
	g('set label "%d %d" at %d,%d' % (x,y,x,y))

g.plot(plot1,plot2)

[Gnuplot-py-users] Avoid popup windows when using gnuplot-py?

[Claes H <cla...@gm...>]

Hi,

When I use Gnuplot-py it always pops up two windows, one graph window
and one terminal as it runs. Also, they are stealing focus Is there
any way to avoid that, i.e. run it in the background?

Thanks,
Claes

-- 
C l a e s    H o l m e r s o n

Re: [Gnuplot-py-users] Weird Window crashes when using Gnuplot via Python

[Benny M. <ben...@gm...>]

2010/3/12 Rajan Gurjar <rjn...@gm...>:
> Thanks Benny,
> I think I tried it already and if I recollect it did not work, but I will
> try again when I get home (I have been at it for the last two weeks
> endlessly booting my computer million times  by now).
> However, I have dug out a Win ME at work and followed the same install
> procedures as I did at home on my Win ME or on my Win XP. And everything ran
> perfectly well. I could run the test.py without any problems. In fact I used
> older versions of python 2.4 and gnuplot 4.2.
> This suggests something wrong with my Window ME installation? I am going to
> try and do a system restore to an earlier date.  I recently downloaded
> "registry patrol" software from a vendor and it may have blocked certain
> applications while cleaning my registry.
>
> I notice that I cannot see the .gih file in gnuplot\bin. Also when I click
> on the gnuplot.hlp file I get a message (I cannot recall exactly and so I am
> giving a distorted version here -sorry about that) : Cannot open it because
> the file cannot be found or being used. It may have been renamed....
> I however, see all these files at my office WinME and can open the hlp
> files. Isn't the .gih file used during a gnuplot run? So I am happy that
> this is not a real bug for WinME in general but some nasty occurrence in my
> machine. Would you have any suggestions?

No. I stopped with windows after Win95. It seems like disk or OS
problem on your machine.
I'd say reinstall gnuplot and Gnuplot.py

Benny

Re: [Gnuplot-py-users] Weird Window crashes when using Gnuplot via Python

[Rajan G. <rjn...@gm...>]

Thanks Benny,
I think I tried it already and if I recollect it did not work, but I will
try again when I get home (I have been at it for the last two weeks
endlessly booting my computer million times  by now).
However, I have dug out a Win ME at work and followed the same install
procedures as I did at home on my Win ME or on my Win XP. And everything ran
perfectly well. I could run the test.py without any problems. In fact I used
older versions of python 2.4 and gnuplot 4.2.
This suggests something wrong with my Window ME installation? I am going to
try and do a system restore to an earlier date.  I recently downloaded
"registry patrol" software from a vendor and it may have blocked certain
applications while cleaning my registry.

I notice that I cannot see the .gih file in gnuplot\bin. Also when I click
on the gnuplot.hlp file I get a message (I cannot recall exactly and so I am
giving a distorted version here -sorry about that) : Cannot open it because
the file cannot be found or being used. It may have been renamed....
I however, see all these files at my office WinME and can open the hlp
files. Isn't the .gih file used during a gnuplot run? So I am happy that
this is not a real bug for WinME in general but some nasty occurrence in my
machine. Would you have any suggestions?
Thanks and appreciate your response,
Rajan


On Fri, Mar 12, 2010 at 4:27 AM, Benny Malengier
<ben...@gm...>wrote:

> Try giving direct commands with gnuplot in python shell, and see if
> gnuplot can open a window on your OS.
>
> So:
>
> $ python
> Python 2.6.4 (r264:75706, Dec  7 2009, 18:43:55)
> [GCC 4.4.1] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>
> >>> import Gnuplot
> >>> a = Gnuplot.Gnuplot()
> >>> a('plot sin(x)')
> >>>
>
> You should see a gnuplot window open up that shows sin(x).
>
> Also, check the bug tracker,
> https://sourceforge.net/tracker/?group_id=17434&atid=117434 , there
> are several patches posted there for windows. By lack of windows to
> test, and lack of other windows users to test it, I think those do not
> get added to the code.
>
> Benny
> 2010/3/10 Rajan Gurjar <rjn...@gm...>:
> > Hi,
> > I have gnuplot-py-1.8 (is residing in site-packages dir of Python)
> > Python 2.5 (residing in C)
> > Gnuplot v4.4 (residing in C:\Program Files and also a different named
> copy
> > in C:\).
> >
> > O.S: Win ME (I only hope this does not discourage you from reading
> further)
> >
> > I have been able to run python codes with numpy without much issue but
> never
> > tried plotting using Gnuplot. I would use Excel to plot the data files
> until
> > I decided Gnuplot was the way to go.
> >
> > The binary setup installation ran well for all. I think all the paths are
> > defined - because I am able to give a command "python" from any directory
> > and I get to the python shell immediately.
> >
> > Also typing "wgnuplot" or "pgnuplot" from any directory I am able to open
> > the Gnuplot terminal and plot functions such as sinx/x etc.
> >
> > However, when I go to Python25\Lib\site-packages\Gnuplot and run 'python
> > test.py' from command window or run test.py from IDLE, the computer
> > immediately crashes and I have to reboot.
> >
> > Earlier, I would get it to work till
> >
> > print (
> >         'This program exercises many of the features of Gnuplot.py.
> The\n'
> >         'commands that are actually sent to gnuplot are printed for
> your\n'
> >         'enjoyment.'
> >         )
> >
> >     wait('Popping up a blank gnuplot window on your screen.')
> >     g = Gnuplot.Gnuplot(debug=1)
> >     g.clear()
> >
> >     # Make two temporary files:
> >     if hasattr(tempfile, 'mkstemp'):
> >         (fd, filename1,) = tempfile.mkstemp(text=1)
> >         f = os.fdopen(fd, 'w')
> >         (fd, filename2,) = tempfile.mkstemp(text=1)
> >     else:
> >         filename1 = tempfile.mktemp()
> >         f = open(filename1, 'w')
> >         filename2 = tempfile.mktemp()
> >     try:
> >         for x in numpy.arange(100.)/5. - 10.:
> >             f.write('%s %s %s\n' % (x, math.cos(x), math.sin(x)))
> >         f.close()
> >
> >         print '############### test Func
> > ###################################'
> >         wait('Plot a gnuplot-generated function')
> >
> > And then the screen would freeze and I had to reboot.
> >
> > However, I never get the plot window and the Gnuplot terminal to open up.
> > The reason I say the above commands worked is because I can see the
> printout
> > in my DOS command window. I can also see the tmp files in the TEMP
> > directory.
> >
> >
> > I tried playing around mainly changing the paths or changing the
> directory
> > of Gnuplot from Program Files to just C:\ - thinking that the space could
> be
> > an issue.
> > I tried running other programs such as demo.py.
> >
> > After several such trials, now I am not able to see any messages on the
> > command window because DOS window just disappears and I see a blue screen
> > asking me to cntrl-alt-del or to reboot.
> >
> > I further debugged and saw that ' temp' data files e.g., in the demo.py
> were
> > being written to temp files. It is only when it comes to plotting that
> the
> > computer hangs.
> >
> > I then tried this: I changed the name of the Gnuplot (i.e., Gnuplot app
> 4.4)
> > directory to 'guplot' but without making changes to the PATH, and then I
> ran
> > the demo program - my thought was that it should not be able to find the
> > Gnuplot application and would give me some error messages rather than
> > computer hanging.
> >
> > But unfortunately, the computer still hangs for test.py. It runs all the
> way
> > till
> >
> >   print '############### test Func ###################################'
> >         wait('Plot a gnuplot-generated function')
> >
> > and then goes bust. Although the command window diappears in a flash I
> can
> > make out the long comment line stated above. Again none of the command or
> > plot windows pertaining to Gnuplot open up. The entire screen just blinks
> > and then becomes dead.
> >
> >
> > Another fact I would like to mention is that I tried all the above on Win
> XP
> > at my work, under similar file configuration and I get no issues at all.
> >
> > I guess this is how far I have been able to proceed.
> >
> > Any help would be appreciated despite that fact that I will be strongly
> > discouraged from using WinME (I will eventually transition to Linux) but
> it
> > will take some time. I just feel that this is a solvable problem and may
> not
> > be a Win ME issue (hope!!).
> >
> > Rajan
> >
> >
> >
> >
> >
> ------------------------------------------------------------------------------
> > Download Intel&#174; Parallel Studio Eval
> > Try the new software tools for yourself. Speed compiling, find bugs
> > proactively, and fine-tune applications for parallel performance.
> > See why Intel Parallel Studio got high marks during beta.
> > http://p.sf.net/sfu/intel-sw-dev
> > _______________________________________________
> > Gnuplot-py-users mailing list
> > Gnu...@li...
> > https://lists.sourceforge.net/lists/listinfo/gnuplot-py-users
> >
> >
>

Re: [Gnuplot-py-users] Weird Window crashes when using Gnuplot via Python

[Benny M. <ben...@gm...>]

Try giving direct commands with gnuplot in python shell, and see if
gnuplot can open a window on your OS.

So:

$ python
Python 2.6.4 (r264:75706, Dec  7 2009, 18:43:55)
[GCC 4.4.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.

>>> import Gnuplot
>>> a = Gnuplot.Gnuplot()
>>> a('plot sin(x)')
>>>

You should see a gnuplot window open up that shows sin(x).

Also, check the bug tracker,
https://sourceforge.net/tracker/?group_id=17434&atid=117434 , there
are several patches posted there for windows. By lack of windows to
test, and lack of other windows users to test it, I think those do not
get added to the code.

Benny
2010/3/10 Rajan Gurjar <rjn...@gm...>:
> Hi,
> I have gnuplot-py-1.8 (is residing in site-packages dir of Python)
> Python 2.5 (residing in C)
> Gnuplot v4.4 (residing in C:\Program Files and also a different named copy
> in C:\).
>
> O.S: Win ME (I only hope this does not discourage you from reading further)
>
> I have been able to run python codes with numpy without much issue but never
> tried plotting using Gnuplot. I would use Excel to plot the data files until
> I decided Gnuplot was the way to go.
>
> The binary setup installation ran well for all. I think all the paths are
> defined - because I am able to give a command "python" from any directory
> and I get to the python shell immediately.
>
> Also typing "wgnuplot" or "pgnuplot" from any directory I am able to open
> the Gnuplot terminal and plot functions such as sinx/x etc.
>
> However, when I go to Python25\Lib\site-packages\Gnuplot and run 'python
> test.py' from command window or run test.py from IDLE, the computer
> immediately crashes and I have to reboot.
>
> Earlier, I would get it to work till
>
> print (
>         'This program exercises many of the features of Gnuplot.py.  The\n'
>         'commands that are actually sent to gnuplot are printed for your\n'
>         'enjoyment.'
>         )
>
>     wait('Popping up a blank gnuplot window on your screen.')
>     g = Gnuplot.Gnuplot(debug=1)
>     g.clear()
>
>     # Make two temporary files:
>     if hasattr(tempfile, 'mkstemp'):
>         (fd, filename1,) = tempfile.mkstemp(text=1)
>         f = os.fdopen(fd, 'w')
>         (fd, filename2,) = tempfile.mkstemp(text=1)
>     else:
>         filename1 = tempfile.mktemp()
>         f = open(filename1, 'w')
>         filename2 = tempfile.mktemp()
>     try:
>         for x in numpy.arange(100.)/5. - 10.:
>             f.write('%s %s %s\n' % (x, math.cos(x), math.sin(x)))
>         f.close()
>
>         print '############### test Func
> ###################################'
>         wait('Plot a gnuplot-generated function')
>
> And then the screen would freeze and I had to reboot.
>
> However, I never get the plot window and the Gnuplot terminal to open up.
> The reason I say the above commands worked is because I can see the printout
> in my DOS command window. I can also see the tmp files in the TEMP
> directory.
>
>
> I tried playing around mainly changing the paths or changing the directory
> of Gnuplot from Program Files to just C:\ - thinking that the space could be
> an issue.
> I tried running other programs such as demo.py.
>
> After several such trials, now I am not able to see any messages on the
> command window because DOS window just disappears and I see a blue screen
> asking me to cntrl-alt-del or to reboot.
>
> I further debugged and saw that ' temp' data files e.g., in the demo.py were
> being written to temp files. It is only when it comes to plotting that the
> computer hangs.
>
> I then tried this: I changed the name of the Gnuplot (i.e., Gnuplot app 4.4)
> directory to 'guplot' but without making changes to the PATH, and then I ran
> the demo program - my thought was that it should not be able to find the
> Gnuplot application and would give me some error messages rather than
> computer hanging.
>
> But unfortunately, the computer still hangs for test.py. It runs all the way
> till
>
>   print '############### test Func ###################################'
>         wait('Plot a gnuplot-generated function')
>
> and then goes bust. Although the command window diappears in a flash I can
> make out the long comment line stated above. Again none of the command or
> plot windows pertaining to Gnuplot open up. The entire screen just blinks
> and then becomes dead.
>
>
> Another fact I would like to mention is that I tried all the above on Win XP
> at my work, under similar file configuration and I get no issues at all.
>
> I guess this is how far I have been able to proceed.
>
> Any help would be appreciated despite that fact that I will be strongly
> discouraged from using WinME (I will eventually transition to Linux) but it
> will take some time. I just feel that this is a solvable problem and may not
> be a Win ME issue (hope!!).
>
> Rajan
>
>
>
>
> ------------------------------------------------------------------------------
> Download Intel&#174; Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
> _______________________________________________
> Gnuplot-py-users mailing list
> Gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-py-users
>
>

[Gnuplot-py-users] Weird Window crashes when using Gnuplot via Python

[Rajan G. <rjn...@gm...>]

Hi,
I have gnuplot-py-1.8 (is residing in site-packages dir of Python)
Python 2.5 (residing in C)
Gnuplot v4.4 (residing in C:\Program Files and also a different named copy
in C:\).

O.S: Win ME (I only hope this does not discourage you from reading further)

I have been able to run python codes with numpy without much issue but never
tried plotting using Gnuplot. I would use Excel to plot the data files until
I decided Gnuplot was the way to go.

The binary setup installation ran well for all. I think all the paths are
defined - because I am able to give a command "python" from any directory
and I get to the python shell immediately.

Also typing "wgnuplot" or "pgnuplot" from any directory I am able to open
the Gnuplot terminal and plot functions such as sinx/x etc.

However, when I go to Python25\Lib\site-packages\Gnuplot and run 'python
test.py' from command window or run test.py from IDLE, the computer
immediately crashes and I have to reboot.

Earlier, I would get it to work till

print (
        'This program exercises many of the features of Gnuplot.py.  The\n'
        'commands that are actually sent to gnuplot are printed for your\n'
        'enjoyment.'
        )

    wait('Popping up a blank gnuplot window on your screen.')
    g = Gnuplot.Gnuplot(debug=1)
    g.clear()

    # Make two temporary files:
    if hasattr(tempfile, 'mkstemp'):
        (fd, filename1,) = tempfile.mkstemp(text=1)
        f = os.fdopen(fd, 'w')
        (fd, filename2,) = tempfile.mkstemp(text=1)
    else:
        filename1 = tempfile.mktemp()
        f = open(filename1, 'w')
        filename2 = tempfile.mktemp()
    try:
        for x in numpy.arange(100.)/5. - 10.:
            f.write('%s %s %s\n' % (x, math.cos(x), math.sin(x)))
        f.close()

        print '############### test Func
###################################'
        wait('Plot a gnuplot-generated function')

And then the screen would freeze and I had to reboot.

However, I never get the plot window and the Gnuplot terminal to open up.
The reason I say the above commands worked is because I can see the printout
in my DOS command window. I can also see the tmp files in the TEMP
directory.


I tried playing around mainly changing the paths or changing the directory
of Gnuplot from Program Files to just C:\ - thinking that the space could be
an issue.
I tried running other programs such as demo.py.

After several such trials, now I am not able to see any messages on the
command window because DOS window just disappears and I see a blue screen
asking me to cntrl-alt-del or to reboot.

I further debugged and saw that ' temp' data files e.g., in the demo.py were
being written to temp files. It is only when it comes to plotting that the
computer hangs.

I then tried this: I changed the name of the Gnuplot (i.e., Gnuplot app 4.4)
directory to 'guplot' but without making changes to the PATH, and then I ran
the demo program - my thought was that it should not be able to find the
Gnuplot application and would give me some error messages rather than
computer hanging.

But unfortunately, the computer still hangs for test.py. It runs all the way
till

  print '############### test Func ###################################'
        wait('Plot a gnuplot-generated function')

and then goes bust. Although the command window diappears in a flash I can
make out the long comment line stated above. Again none of the command or
plot windows pertaining to Gnuplot open up. The entire screen just blinks
and then becomes dead.


Another fact I would like to mention is that I tried all the above on Win XP
at my work, under similar file configuration and I get no issues at all.

I guess this is how far I have been able to proceed.

Any help would be appreciated despite that fact that I will be strongly
discouraged from using WinME (I will eventually transition to Linux) but it
will take some time. I just feel that this is a solvable problem and may not
be a Win ME issue (hope!!).

Rajan

Re: [Gnuplot-py-users] gnuplot and windows

[Paweł S. <paw...@gm...>]

In what path you have a Gnuplot installed. I have that error when in
Gnuplot path i have a " " (space)
in my example :
"c:/Program Files/Gnuplot/bin/wgnuplot.exe".
Then I copy Gnuplot dir to c:/ and change a path in gp_win32.py and
that solve my problem.

Pleas answer did this help you too ???


Paweł Siergiejuk

2010/3/3 alain dimier <ala...@gm...>:
> Hi
>
> I try to run Gnuplot in Python under windows with IDLE or through a command
> line. I'm running Python version. 2.6.4.
>
>
> import Gnuplot, Gnuplot.funcutils
> from numpy import *
> g = Gnuplot.Gnuplot(debug=1)
> gnuplot> set terminal windows
> g.title('A simple example')
>
>
> Traceback (most recent call last):
>   File "<pyshell#4>", line 1, in <module>
>     g.title('A simple example')
>   File "C:\Python26\lib\site-packages\Gnuplot\_Gnuplot.py", line 473, in
> title
>     self.set_label('title', s, offset=offset, font=font)
>   File "C:\Python26\lib\site-packages\Gnuplot\_Gnuplot.py", line 410, in
> set_label
>     self(string.join(cmd))
>   File "C:\Python26\lib\site-packages\Gnuplot\_Gnuplot.py", line 210, in
> __call__
>     self.gnuplot(s)
>   File "C:\Python26\lib\site-packages\Gnuplot\gp_win32.py", line 130, in
> __call__
>     self.write(s + '\n')
> IOError: [Errno 22] Invalid argument
>
> Can you give me some advice about the way to solve that problem?
> Best Regards
>
>
> --
> Alain Dimier
>
> (33) 4 26 64 86 91
>
> ------------------------------------------------------------------------------
> Download Intel&#174; Parallel Studio Eval
> Try the new software tools for yourself. Speed compiling, find bugs
> proactively, and fine-tune applications for parallel performance.
> See why Intel Parallel Studio got high marks during beta.
> http://p.sf.net/sfu/intel-sw-dev
> _______________________________________________
> Gnuplot-py-users mailing list
> Gnu...@li...
> https://lists.sourceforge.net/lists/listinfo/gnuplot-py-users
>
>

[Gnuplot-py-users] gnuplot and windows

[alain d. <ala...@gm...>]

Hi

I try to run Gnuplot in Python under windows with IDLE or through a command
line. I'm running Python version. 2.6.4.


import Gnuplot, Gnuplot.funcutils
from numpy import *
g = Gnuplot.Gnuplot(debug=1)
gnuplot> set terminal windows
g.title('A simple example')


Traceback (most recent call last):
  File "<pyshell#4>", line 1, in <module>
    g.title('A simple example')
  File "C:\Python26\lib\site-packages\Gnuplot\_Gnuplot.py", line 473, in
title
    self.set_label('title', s, offset=offset, font=font)
  File "C:\Python26\lib\site-packages\Gnuplot\_Gnuplot.py", line 410, in
set_label
    self(string.join(cmd))
  File "C:\Python26\lib\site-packages\Gnuplot\_Gnuplot.py", line 210, in
__call__
    self.gnuplot(s)
  File "C:\Python26\lib\site-packages\Gnuplot\gp_win32.py", line 130, in
__call__
    self.write(s + '\n')
IOError: [Errno 22] Invalid argument

Can you give me some advice about the way to solve that problem?
Best Regards


-- 
Alain Dimier

(33) 4 26 64 86 91

[Gnuplot-py-users] gnuplot.py background color

[<w.n...@o2...>]

This works

g('set terminal png notransparent medium size 800,600 crop x000000')
g('set output "gp-test2.png"')
g.plot(d)

[Gnuplot-py-users] gnuplot.py background color

[<w.n...@o2...>]

How do I change the background color from white (default?) to black?

I've tried many things including a .gnuplot file with no success.
I have been unable to find an example.

Thank you for your help.

Bill Nayland

Re: [Gnuplot-py-users] problem with calling a file.

[Shibnath P. <shi...@gm...>]

Hi,

Thanks to all for reply. I solved that problem.

Now I am facing one new problem. When I am using "set terminal postscript
enhanced  color " to save the graph in .ps for multi plotting (three curves
in one page ) the curves are coming deferent color but the lines are not
solid even I declared that  g('set data style lines').

Thank you
Shibnath

On Wed, Dec 16, 2009 at 10:50 AM, Shibnath Pathak
<shi...@gm...>wrote:

> Hi,
>
> I am new to python and gunplot.py . But I am quite familiar with Gnuplot.
> So in Gnuplot to plot a file I used  " gnuplot> plot "filename" using 1:2
> with lines ". The file is in text form and the data are saving there in two
> column 1st one is x axis and 2nd one is Y axis.
>
> In Gnuplot.py  I try to plot same file like this "
>
> from numpy import *
> import Gnuplot, Gnuplot.funcutils
> g = Gnuplot.Gnuplot(debug=1)
> g.title('A simple example') # (optional)
> f = open('filename', 'r' )
> g.plot(f, using = (1,2), with_='lines')
> raw_input('Please press return to continue...\n')
>
>
> But I didn't get any plot.
> So please help me.
>
> Thank you in advance.
>
> --
> Shibnath Pathak
>
>


-- 
Shibnath Pathak

Re: [Gnuplot-py-users] problem with calling a file.

[Michael H. <mh...@al...>]

Shibnath Pathak wrote:
> I am new to python and gunplot.py. [...]

I suggest you start by running the demo:

    python demo.py

and looking at the heavily documented source code of demo.py to learn
the basics.  After that you can read the documentation strings in the
other Gnuplot.py modules, especially _Gnuplot.py and PlotItems.py.

Michael

Re: [Gnuplot-py-users] problem with calling a file.

[Andrzej N. <no...@gm...>]

Hi,

It looks like you are passing Python file handle to g.plot().

If you are trying to plot data in a file, I think it expects
Gnuplot.File object. I don't know if it will handle a string of
filename automatically, since a string could be an equation as well.

Look at help(g.plot) and help(Gnuplot.File) for more information.

Regards,

Andrzej


> From: Shibnath Pathak <shi...@gm...>
> To: gnu...@li...
> Subject: [Gnuplot-py-users] problem with calling a file.
> Date: Wed, 16 Dec 2009 10:50:25 +0100
>
> Hi,
>
> I am new to python and gunplot.py . But I am quite familiar with Gnuplot. So
> in Gnuplot to plot a file I used  " gnuplot> plot "filename" using 1:2 with
> lines ". The file is in text form and the data are saving there in two
> column 1st one is x axis and 2nd one is Y axis.
>
> In Gnuplot.py  I try to plot same file like this "
>
> from numpy import *
> import Gnuplot, Gnuplot.funcutils
> g = Gnuplot.Gnuplot(debug=1)
> g.title('A simple example') # (optional)
> f = open('filename', 'r' )
> g.plot(f, using = (1,2), with_='lines')
> raw_input('Please press return to continue...\n')
>
>
> But I didn't get any plot.
> So please help me.
>
> Thank you in advance.
>
> --
> Shibnath Pathak

[Gnuplot-py-users] problem with calling a file.

[Shibnath P. <shi...@gm...>]

Hi,

I am new to python and gunplot.py . But I am quite familiar with Gnuplot. So
in Gnuplot to plot a file I used  " gnuplot> plot "filename" using 1:2 with
lines ". The file is in text form and the data are saving there in two
column 1st one is x axis and 2nd one is Y axis.

In Gnuplot.py  I try to plot same file like this "

from numpy import *
import Gnuplot, Gnuplot.funcutils
g = Gnuplot.Gnuplot(debug=1)
g.title('A simple example') # (optional)
f = open('filename', 'r' )
g.plot(f, using = (1,2), with_='lines')
raw_input('Please press return to continue...\n')


But I didn't get any plot.
So please help me.

Thank you in advance.

-- 
Shibnath Pathak

[Gnuplot-py-users] can't set date format, is that a bug?

[zhangwei02 <zha...@ba...>]

Hi
I use gnuplot-py ,load a file to draw a graph:

Code:
import Gnuplot, Gnuplot.funcutils

g = Gnuplot.Gnuplot(debug=1)
g.title('a example') # (optional)
g('set timefmt "%Y%m%d"')
g('set xlabel "Date"')
g('set format x "%Y%m%d"') #---------------- bug?
g('set ylabel "JobNum"')
g('set xtics rotate')
g('set terminal png font "fonts/msyh.ttf" 12') # add !
g('set output \'graph_1.png\'') # add!
filename='hadoop.data'
thefile1 = Gnuplot.File(filename, using = (1,2), with_='lines')
g.plot(thefile1)

the data file's 1st column is date string.
It execute as this:
gnuplot> set terminal x11
gnuplot> set title "a example"
gnuplot> set timefmt "%Y%m%d"
gnuplot> set xlabel "Date"
gnuplot> set format x "%Y%m%d"
gnuplot> set ylabel "JobNum"
gnuplot> set xtics rotate
gnuplot> set terminal png font "fonts/msyh.ttf" 12
gnuplot> set output 'graph_1.png'
gnuplot> plot "hadoop.data" using 1:2 with lines

gnuplot: unable to open display ''
gnuplot: X11 aborted.
         line 0: Bad format character


the graph output is empty, but I execute it ok in gnuplot.
And  when I comment the line above, the picture output is ok,but the x items are not date string, so it must be something wrong on the line

Is that a bug? Or how to set the output's format.


Thanks!

[Gnuplot-py-users] can't set date format, is that a bug?

[zhangwei02 <zha...@ba...>]

Hi
I use gnuplot-py ,load a file to draw a graph:

Code:
import Gnuplot, Gnuplot.funcutils

g = Gnuplot.Gnuplot(debug=1)
g.title('a example') # (optional)
g('set timefmt "%Y%m%d"')
g('set xlabel "Date"')
g('set format x "%Y%m%d"') #---------------- bug?
g('set ylabel "JobNum"')
g('set xtics rotate')
g('set terminal png font "fonts/msyh.ttf" 12') # add !
g('set output \'graph_1.png\'') # add!
filename='hadoop.data'
thefile1 = Gnuplot.File(filename, using = (1,2), with_='lines')
g.plot(thefile1)

the data file's 1st column is date string.
It execute as this:
gnuplot> set terminal x11
gnuplot> set title "a example"
gnuplot> set timefmt "%Y%m%d"
gnuplot> set xlabel "Date"
gnuplot> set format x "%Y%m%d"
gnuplot> set ylabel "JobNum"
gnuplot> set xtics rotate
gnuplot> set terminal png font "fonts/msyh.ttf" 12
gnuplot> set output 'graph_1.png'
gnuplot> plot "hadoop.data" using 1:2 with lines

gnuplot: unable to open display ''
gnuplot: X11 aborted.
         line 0: Bad format character


the graph output is empty, but I execute it ok in gnuplot.

So is that a bug? Or how to set the output's format as date.


Thanks!

[Gnuplot-py-users] Gnuplot Book: Finally (finally!) in print!

[Philipp K. J. <ja...@ma...>]

After what at times seemed like an interminable
delay, the Gnuplot book is finally available in 
printed form!

This means that anybody who pre-ordered the 
book should by now already have their copy or
receive it within the next few days.

I wanted to thank all of you who contributed 
questions and comments, or pointed out errors in 
the draft version of the manuscript. It really made 
a difference!

More details are available on the publisher's site:
        www.manning.com/janert

and the book is available from any bookseller,
including Amazon:
        http://www.amazon.com/gp/product/1933988398

I wanted to thank everyone for their patience and
also wanted to apologize again for the delay. I hope 
you will find that it was worth it.

Best,

                Ph.

Re: [Gnuplot-py-users] Running Gnuplot.py in IDLE

[Michael H. <mh...@al...>]

Samuel H. Dupree, Jr. wrote:
> I'm attempting to run Gnuplot in Python under IDLE. I'm running Python
> version. 2.5 on a Power Mac G4 under Mac OS X, version 10.4.11. I've
> installed Gnuplot-py version 1.8 and I have Gnuplot version 4.2.
> 
> [...]
> However, when I attempt to run this program under IDLE, I get no plot
> whatsoever and IDLE produces the following report:
> 
> Python 2.5 (r25:51918, Sep 19 2006, 08:49:13)
> [GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
> Type "copyright", "credits" or "license()" for more information.
> 
>     ****************************************************************
>     Personal firewall software may warn about the connection IDLE
>     makes to its subprocess using this computer's internal loopback
>     interface.  This connection is not visible on any external
>     interface and no data is sent to or received from the Internet.
>     ****************************************************************
>    
> IDLE 1.2     
>>>> ================================ RESTART
> ================================
>>>>
> gnuplot> set terminal aqua
> 
> Traceback (most recent call last):
>   File "/Users/samueldupree/python programs/example_gnuplot.py", line
> 16, in <module>
>     g.plot(t, y)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/Gnuplot/_Gnuplot.py",
> line 285, in plot
>     self.refresh()
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/Gnuplot/_Gnuplot.py",
> line 226, in refresh
>     self(self.plotcmd + ' ' + string.join(plotcmds, ', '))
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/Gnuplot/_Gnuplot.py",
> line 210, in __call__
>     self.gnuplot(s)
>   File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/Gnuplot/gp_macosx.py",
> line 144, in __call__
>     self.flush()
> IOError: [Errno 32] Broken pipe
>>>>
> 
> My questions for the list are:
> 
>    1. What am I doing wrong?
>    2. What path variables of parameters do I need to set?
>    3. Why does my program work when running in a terminal window as
>       opposed to running under IDLE?

It could be that your PATH is not set correctly when running under idle,
and so Gnuplot.py cannot find the gnuplot executable.

Michael

[Gnuplot-py-users] Running Gnuplot.py in IDLE

[Samuel H. D. Jr. <sd...@sp...>]

Greetings,

I'm attempting to run Gnuplot in Python under IDLE. I'm running Python 
version. 2.5 on a Power Mac G4 under Mac OS X, version 10.4.11. I've 
installed Gnuplot-py version 1.8 and I have Gnuplot version 4.2.

I have Gnuplot defaulted to display plots using AquaTerm.app version 
1.0.1. This has been working fine. When I run the following Python code 
in a terminal window

                #example_gnuplot.py

                from numpy import *
                import Gnuplot, Gnuplot.funcutils

                def f(t):
                    return t**2*exp(-t**2)

                g = Gnuplot.Gnuplot(debug=1)

                t = linspace(0, 3, 51)    # 51 points between 0 and 3
                y = zeros(len(t))         # allocate y with float elements
                for i in xrange(len(t)):
                    y[i] = f(t[i])

                g.plot(t, y)*

                *

produces the desired plot with the following listing:

            dsl092-239-159:~/python programs samueldupree$ python
            example_gnuplot.py
            gnuplot> set terminal aqua
            gnuplot> plot "/tmp/tmpytUeOa.gnuplot/fifo" notitle,
            "/tmp/tmp-7QSsP.gnuplot/fifo" notitle
            2009-08-08 05:07:28.182 gnuplot[1510]
            libaquaterm::Warning: Logging at level 4
            2009-08-08 05:07:28.184 gnuplot[1510]
            libaquaterm::Launching server...
            2009-08-08 05:07:28.564 gnuplot[1510]
            libaquaterm::LSOpenCFURLRef = 0
            2009-08-08 05:07:28.573 gnuplot[1510]
            libaquaterm::Waiting... 9
            2009-08-08 05:07:29.585 gnuplot[1510]
            libaquaterm::Server version 1.0.1
            2009-08-08 05:07:29.586 gnuplot[1510]
            libaquaterm::Connected!
            2009-08-08 05:07:29.755 gnuplot[1510]
            libaquaterm::Active plot: 0
            dsl092-239-159:~/python programs samueldupree$

However, when I attempt to run this program under IDLE, I get no plot 
whatsoever and IDLE produces the following report:

Python 2.5 (r25:51918, Sep 19 2006, 08:49:13)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "copyright", "credits" or "license()" for more information.

    ****************************************************************
    Personal firewall software may warn about the connection IDLE
    makes to its subprocess using this computer's internal loopback
    interface.  This connection is not visible on any external
    interface and no data is sent to or received from the Internet.
    ****************************************************************
   
IDLE 1.2     
 >>> ================================ RESTART 
================================
 >>>
gnuplot> set terminal aqua

Traceback (most recent call last):
  File "/Users/samueldupree/python programs/example_gnuplot.py", line 
16, in <module>
    g.plot(t, y)
  File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/Gnuplot/_Gnuplot.py", 
line 285, in plot
    self.refresh()
  File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/Gnuplot/_Gnuplot.py", 
line 226, in refresh
    self(self.plotcmd + ' ' + string.join(plotcmds, ', '))
  File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/Gnuplot/_Gnuplot.py", 
line 210, in __call__
    self.gnuplot(s)
  File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/Gnuplot/gp_macosx.py", 
line 144, in __call__
    self.flush()
IOError: [Errno 32] Broken pipe
 >>>

My questions for the list are:

   1. What am I doing wrong?
   2. What path variables of parameters do I need to set?
   3. Why does my program work when running in a terminal window as
      opposed to running under IDLE?


Sam Dupree.

[Gnuplot-py-users] Plotting data by date: Illegal day of month

[Gregory P. <gp...@gm...>]

I am trying to plot data with a date on the x-axis. I am using

self.gnuplot = Gnuplot.Gnuplot(debug=1)
self.gnuplot('set xdata time')
self.gnuplot('set timefmt "%Y%m%d"') # format of the actual data
self.gnuplot('set format x "%y-%m-%d"') # for the xtics
self.gnuplot.plot(Gnuplot.Data(data,using='1:2'),Gnuplot.Func('%.2f' %
average, title='Average = %.2f' % average))

where data is, for example, something like this:

[[20090622, -113.91], [20090623, -110.59], [20090624, -124.11],
[20090625, -161.97], [20090626, -156.63], [20090627, -181.51],
[20090628, -211.62], [20090629, -211.62], [20090630, -215.41],
[20090631, -164.89], [20090702, -121.84], [20090703, -122.18],
[20090704, -108.14], [20090705, -97.77], [20090706, -120.37],
[20090707, -110.40], [20090708, -147.95], [20090709, -138.48]]

I'm passing the date as an integer in the format %Y%m%d since I wasn't
able to convince Gnuplot to accept a string. My problem is that I get
this error:

/tmp/tmpU2rqK2.gnuplot/fifo:1:         line 0: illegal day of month

when the dates span two different months. In this case, it is the date
20090701 that causes the error. However, if I add 1 to all dates, this
error is avoided, since that gets rid of July 1st. It doesn't seem to
mind if there's a June 31st, or even a June 32nd if I add two.

I wonder if the data is getting mangled somewhere between my plot
command and what gnuplot tries to plot. I notice, for example, when
plotting this data:

[[20090720, -21.5], [20090721, -18.87], [20090722, -41.43], [20090723,
0.0], [20090724, -58.06], [20090725, 0.0], [20090726, -13.4]]

what I get on screen is actually

[[20090720,-18.87], [20090722,-41.43], [20090724, 0.0],
[20090724,-58.06], [20090724,0.0], [20090726,-13.4]]

Some y values are moved to the wrong day, some days are dropped
completely, and others are repeated with different values. The order
of the values, at least, is correct, although the first one was
dropped. Any ideas what could be going on?

I am using version 1.8 of Gnuplot.py and 2.6.2 of python.

Re: [Gnuplot-py-users] save plot into stream, possible?

[Alan G I. <ai...@am...>]

Juana Arco wrote:
> I'm trying to save a plot into a stream and call it from a webpage, I 
> cannot find a way to do it.


This does not seem like a Gnuplot.py question.
Try comp.lang.python
(and take a look at http://www.daniweb.com/code/snippet337.html)

Alan Isaac

[Gnuplot-py-users] save plot into stream, possible?

[Juana A. <lua...@ho...>]

Hi,

I'm trying to save a plot into a stream and call it from a webpage, I cannot find a way to do it.

Thanks,

Lua



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[Gnuplot-py-users] Dual y axis using gnuplot.py?

[William W. <Wil...@sa...>]

Hi,
 
How do I generate dual y-axis plot using gnuplot.py?  I tried the ususal
way 
 
g.plot(Gnuplot.data(list, axis='x1y2')) and it complains.

Thanks,
 
William Wu
408-801-2743
 

Re: [Gnuplot-py-users] Assigning variables

[Jan B. <Jan...@ph...>]

Instead of writing
g('now =', now) 
you should pass a formatted string to gnuplot like
g( ('now = %s' % str(now) ) )

Or simply avoid the comma, "+" is a better choice ;-)
g( 'now =' + str(now) )

I am doing something quite similar with
function_string = "A*exp(-B*x)"
g( 'fit ' + function_string + ' \"filename\" u 1:2 via A,B' )

Jan

Am Freitag, 10. Juli 2009 18:19 schrieb Olan Byrne:
>  Hello all,
>
> Just a quick question on something I seem to be stuck with. With gnuplot.py
> I want to be able to subtract the current timestamp from column 1. The most
> straight-forward way seems to be to set an interim value 'now' and then
> pass this into the plot statement. However I cannot figure out how to get
> the timestamp variable 'now' from python assigned in gnuplot. A segment of
> what I'm trying to do is below:
>
> py:
>         from time import time
>         now = time()
>         print now
>         g('now =', now)  ## problem line. g() can't take the extra now
> input g.plot("'test.txt' using ($1-now):2")
>
> text.txt:
>
> 1247220778.304284    10
> 1247220778.406589    12
> 1247220778.509067    10
> 1247220778.713930    8
> 1247220778.816432    11
> 1247220778.918740    10
> 1247220779.021023    10
>
>
> Apologies if this is a simple question [which is seems like it is], but
> after spending ages googling I still can't find the solution! Thanks for
> any help..
>
> Olan

[Gnuplot-py-users] Assigning variables

[Olan B. <ol...@gm...>]

 Hello all,

Just a quick question on something I seem to be stuck with. With gnuplot.py
I want to be able to subtract the current timestamp from column 1. The most
straight-forward way seems to be to set an interim value 'now' and then pass
this into the plot statement. However I cannot figure out how to get the
timestamp variable 'now' from python assigned in gnuplot. A segment of what
I'm trying to do is below:

py:
        from time import time
        now = time()
        print now
        g('now =', now)  ## problem line. g() can't take the extra now input
        g.plot("'test.txt' using ($1-now):2")

text.txt:

1247220778.304284    10
1247220778.406589    12
1247220778.509067    10
1247220778.713930    8
1247220778.816432    11
1247220778.918740    10
1247220779.021023    10


Apologies if this is a simple question [which is seems like it is], but
after spending ages googling I still can't find the solution! Thanks for any
help..

Olan