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

Re: [Gnuplot-py-users] Gnuplot or gnuplot?

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

Well, it took a lot of digging to figure this one out. I won't bore you with
the details; the bottom line is that the gnuplot.py directory was misnamed.

On Windows 2000 it was

C:\Python25\Lib\site-packages\gnuplot

instead of 

C:\Python25\Lib\site-packages\Gnuplot

    jab--who has a MUCH cleaner workstation now

John Bollinger, CFA, CMT
www.BollingerBands.com

If you advance far enough, you arrive at the beginning.


      ____________________________________________________________________________________
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Re: [Gnuplot-py-users] Gnuplot or gnuplot?

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

BBands wrote:
> I am running the SVN version of Gnuplot.py, Python 2.5.2 and gnuplot 4.1.
> 
> import Gnuplot fails
> 
> import gnuplot succeeds
> 
> Since test.py and demo.py emply the Gnuplot syntax this seems a bit odd.
> 
> I must be missing something, but I am not sure what.

Yes, the Python module is called "Gnuplot", not "gnuplot".

My guess is that either you have some other unrelated gnuplot module
installed, or you are on an OS with a case-insensitive filesystem and
somehow the main directory got installed with a lowercase letter instead
of uppercase.

Michael

[Gnuplot-py-users] Gnuplot or gnuplot?

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

I am running the SVN version of Gnuplot.py, Python 2.5.2 and gnuplot 4.1.

import Gnuplot fails

import gnuplot succeeds

Since test.py and demo.py emply the Gnuplot syntax this seems a bit odd.

I must be missing something, but I am not sure what.

     jab 






John Bollinger, CFA, CMT
www.BollingerBands.com

If you advance far enough, you arrive at the beginning.


      ____________________________________________________________________________________
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Re: [Gnuplot-py-users] gnuplot with python2.5 and windows

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

Mark Alford wrote:
> On Mon, 28 Apr 2008, John K. Parejko wrote:
>> The version of Gnuplot.py in SVN replaces Numeric with numpy.  It hasn't been 
>> turned into a release yet, but if you can download the latest subversion 
>> trunk (there should be information on how to do this from the sourceforge 
>> page), it should work just fine with numpy.
> 
> What is stopping us from turning the SVN version in to a release?
> I tested it on Fedora and it works fine.
> Is there anything else that I and others can do to expedite the process?

All that is missing is a volunteer who will follow through.

If you want to be that person, let me know what your sourceforge
username is and I'll give you the necessary permissions.  There's even a
document RELEASES.txt telling roughly what I had to do to make the last
release.

Michael

Re: [Gnuplot-py-users] gnuplot with python2.5 and windows

[Mark A. <al...@wu...>]

On Mon, 28 Apr 2008, John K. Parejko wrote:
> The version of Gnuplot.py in SVN replaces Numeric with numpy.  It hasn't been 
> turned into a release yet, but if you can download the latest subversion 
> trunk (there should be information on how to do this from the sourceforge 
> page), it should work just fine with numpy.

What is stopping us from turning the SVN version in to a release?
I tested it on Fedora and it works fine.
Is there anything else that I and others can do to expedite the process?

Re: [Gnuplot-py-users] Newbie question

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

2008/4/29 Johan Ekh <ekh...@gm...>:

> Thanks Benny,
> I think I may have an old version of Gnuplot.py. When I use "with_" I get
> an error and when I use "with"
> I still get the same behavior as before.
>
> How do I download and install the most recent version?


obtain the version in svn, then run :
python setup.py  install

>
>
> /Johan
>
> 2008/4/29 Benny Malengier <ben...@gm...>:
>
> Please, have a look in test.py file in subversion.
> >
> > To plot this do:
> >
> > import Gnuplot
> > >
> > > x = linspace(0.0, 1.8, 18)
> > > y = 3 - 2*x + 2*sin(4*x)
> > > points2 = transpose(array([x,y]))
> >
> > --> no, not needed !
> >
> > >
> > >
> > > g = Gnuplot.Gnuplot(persist=1)
> > > d = Gnuplot.Data(points2, with='linespoints', title='points2')
> >
> > --> no, do:
> >  d = Gnuplot.Data(x, y, with_='linespoints', title='points2')
> >
> > Benny
> >
> >
>

Re: [Gnuplot-py-users] Newbie question

[Johan E. <ekh...@gm...>]

Thanks Benny,
I think I may have an old version of Gnuplot.py. When I use "with_" I get an
error and when I use "with"
I still get the same behavior as before.

How do I download and install the most recent version?

/Johan

2008/4/29 Benny Malengier <ben...@gm...>:

> Please, have a look in test.py file in subversion.
>
> To plot this do:
>
> import Gnuplot
> >
> > x = linspace(0.0, 1.8, 18)
> > y = 3 - 2*x + 2*sin(4*x)
> > points2 = transpose(array([x,y]))
>
> --> no, not needed !
>
> >
> >
> > g = Gnuplot.Gnuplot(persist=1)
> > d = Gnuplot.Data(points2, with='linespoints', title='points2')
>
> --> no, do:
>  d = Gnuplot.Data(x, y, with_='linespoints', title='points2')
>
> Benny
>
>

Re: [Gnuplot-py-users] Newbie question

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

Please, have a look in test.py file in subversion.

To plot this do:

import Gnuplot
>
> x = linspace(0.0, 1.8, 18)
> y = 3 - 2*x + 2*sin(4*x)
> points2 = transpose(array([x,y]))

--> no, not needed !

>
>
> g = Gnuplot.Gnuplot(persist=1)
> d = Gnuplot.Data(points2, with='linespoints', title='points2')

--> no, do:
 d = Gnuplot.Data(x, y, with_='linespoints', title='points2')

Benny

[Gnuplot-py-users] Newbie question

[Johan E. <ekh...@gm...>]

Hi all,
I'm trying to make my first plot using Gnuplot.py.
I'm using scipy and numpy and I have issued the following commands in my
script:


import Gnuplot

x = linspace(0.0, 1.8, 18)
y = 3 - 2*x + 2*sin(4*x)
points2 = transpose(array([x,y]))

g = Gnuplot.Gnuplot(persist=1)
d = Gnuplot.Data(points2, with='linespoints', title='points2')
g.plot(d)


However, the plot consists of only one point, even though the vectors x and
y look as I expect.
I also get the following message:

In [3]: Warning: empty x range [0:0], adjusting to [-1:1]
Warning: empty y range [3:3], adjusting to [2.97:3.03]
gnuplot_x11: Some character sets not available


Does anyone know what I'm doing wrong?

Best regards,
Johan

Re: [Gnuplot-py-users] gnuplot with python2.5 and windows

[John K. P. <par...@sp...>]

> So the question is: what should I do?
> gnuplot-py requires Numeric which requires python 2.4
>
> Isn't there a way to make gnuplot-py working with the new "num-py"  
> module and so with python 2.5?


The version of Gnuplot.py in SVN replaces Numeric with numpy.  It  
hasn't been turned into a release yet, but if you can download the  
latest subversion trunk (there should be information on how to do  
this from the sourceforge page), it should work just fine with numpy.

John

[Gnuplot-py-users] gnuplot with python2.5 and windows

[mattia p. <ma...@cs...>]

Hello,

I am a windows user and I need to make 2D-3D graphs.
I used python to manage the data so I thought to integrate python with gnuplot.
Surfing on the internet, I found the popular module gnuplot-py.
To install gnuplot-py, "Numeric" module is required.
But the site I found was about "num-py" an upgrade of Numeric and I installed it.
But gnuplot-py does require "Numeric".
So I tried to download Numeric and install it, but Numeric does not install on Python 2.5  

So the question is: what should I do?
gnuplot-py requires Numeric which requires python 2.4

Isn't there a way to make gnuplot-py working with the new "num-py" module and so with python 2.5?

Thank you.

/MP

Re: [Gnuplot-py-users] Polar plotting?

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

The plot is a built in function working on the Gnuplot.Data, eg:

data[i] = Gnuplot.Data(self.grid_x,
                            self.sol[i],with_='lines',
                            title='Solution at t=%g' %(time))

where sol is a solution over a grid, then eg to plot a number of profiles:

g.title('Concentration profiles')
g.xlabel('x [1e-6 m]')
g.ylabel('Conc  [mol/mm^3]')
g.plot(data[0])
for val in data[1:]:
    g.replot(val)

So it does not work on polar, to do what you want, keep interacting with
gnuplot commands, so:

g('set terminal x11')
> g('set output')
> g('set polar')
> g('unset border')
> g('unset xtics')
> g('unset ytics')
> g('set size square')
> g('set xrange[-2:2]')
> g('set yrange[-2:2]')


and not:

g.plot(1.7)


instead:

g.('plot(1.7)')

Benny

>
>

[Gnuplot-py-users] Polar plotting?

[Baphijmm <bap...@gm...>]

Hello,

I have just begun to use python at all, much less gnuplot.py; I have to 
say first that so far, this is a great tool and I'm very glad it's out 
there and available.

Now, at the moment I'm having a problem getting the utility to plot a 
polar circle.  Below is the code being used:

g('set terminal x11')
g('set output')
g('set polar')
g('unset border')
g('unset xtics')
g('unset ytics')
g('set size square')
g('set xrange[-2:2]')
g('set yrange[-2:2]')
g.plot(1.7)

It seems perfectly fine until it gets to the actual g.plot() part, where 
it gives me this error:

Traceback (most recent call last):
  File "./pytest", line 83, in <module>
    g.plot(1.7)
  File "/opt/csw/lib/python/site-packages/Gnuplot/_Gnuplot.py", line 
273, in plot
    self._add_to_queue(items)
  File "/opt/csw/lib/python/site-packages/Gnuplot/_Gnuplot.py", line 
243, in _add_to_queue
    self.itemlist.append(PlotItems.Data(item))
  File "/opt/csw/lib/python/site-packages/Gnuplot/PlotItems.py", line 
543, in Data
    utils.write_array(f, set)
  File "/opt/csw/lib/python/site-packages/Gnuplot/utils.py", line 95, in 
write_array
    assert set.shape[0] > 0
IndexError: tuple index out of range

This exact same set of equivalent commands produces a circle of radius 
1.7 in gnuplot.  Am I doing something wrong with the python itself?  The 
documentation is highly sparse, and doesn't mention polar coordinate 
systems at all; as such, I couldn't find the answer there.

Re: [Gnuplot-py-users] Problem in Installation of Gnuplot.py

[<bm...@ca...>]

Quoting diljeet kaur <dil...@ya...>:

>
>
> hi
> im new to gnuplot...so new,that after indeterminant number of 
> attempts to install gnuplot.py., im still trying to do same
>
> i have downloaded gnuplot-py-1.7.tar & untarred it

no, you should check out the svn version with the svn command, then 
install from
the dir you checked the repository out. 1.7 is too old.

> even gave  python setup.py install in directory created by untarring

ok
> It seemingly installs gnuplot correctly

it seems so

> but i cannot use it from a python ide
> it gives following traceback

in the dir you have a test.py program, try that by runniing:

python test.py

also errors?

>
>  import Gnuplot,Gnuplot.funcutils
> File "/usr/local/lib/python2.5/site-packages/Gnuplot/--init--.py" , 
> line 165 , in <module>
>   from gp import Gnuplot0pts , GnuplotProcess, test_persist
> File "/usr/local/lib/python2.5/site-packages/Gnuplot/gp.py", line 41, 
> in <module>
>    from gp_unix import Gnuplot0pts , GnuplotProcess, test_persist
> File "/usr/local/lib/python2.5/site-packages/Gnuplot/gp_unix.py", 
> line 116, in <module>
>    from os import popen
> File "/usr/local/lib/python2.5/site-packages/Gnuplot/os..py", line 
> 134, in <module>
>    from os.path import 
> (curdir,pardir,sep,pathsep,defpath,extsep,altsep.devnull)
> ImportError:No module named path

?? I would supposse the os.path module can be imported on your setup. Trhy it.
On my box:
python
Python 2.5.1 (r251:54863, Mar  7 2008, 03:19:34)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from os.path import 
>>> (curdir,pardir,sep,pathsep,defpath,extsep,altsep,devnull)
>>>

so that statement works just fine here.
>
> Note:(I have manually copied this traceback ,so,pls ignore trivial errors)
>
> Also i don't get wgnuplot.exe in tar

you wouldn't in linux no, that is a windows executable.

> Also,where should Numeric be installed.,,in directory of gnuplot or 
> in of python

I have it in python as a package. Also scipy.

Benny

> Kindly help
>
>
>      Unlimited freedom, unlimited storage. Get it now, on 
> http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/



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[Gnuplot-py-users] Problem in Installation of Gnuplot.py

[diljeet k. <dil...@ya...>]

hi
im new to gnuplot...so new,that after indeterminant number of attempts to install gnuplot.py., im still trying to do same
 
i have downloaded gnuplot-py-1.7.tar & untarred it
even gave  python setup.py install in directory created by untarring
It seemingly installs gnuplot correctly
but i cannot use it from a python ide
it gives following traceback
 
  import Gnuplot,Gnuplot.funcutils
File "/usr/local/lib/python2.5/site-packages/Gnuplot/--init--.py" , line 165 , in <module>
   from gp import Gnuplot0pts , GnuplotProcess, test_persist
File "/usr/local/lib/python2.5/site-packages/Gnuplot/gp.py", line 41, in <module>
    from gp_unix import Gnuplot0pts , GnuplotProcess, test_persist
File "/usr/local/lib/python2.5/site-packages/Gnuplot/gp_unix.py", line 116, in <module>
    from os import popen
File "/usr/local/lib/python2.5/site-packages/Gnuplot/os..py", line 134, in <module>
    from os.path import (curdir,pardir,sep,pathsep,defpath,extsep,altsep.devnull)
ImportError:No module named path
 
Note:(I have manually copied this traceback ,so,pls ignore trivial errors)
 
Also i don't get wgnuplot.exe in tar
Also,where should Numeric be installed.,,in directory of gnuplot or in of python
 
Kindly help


      Unlimited freedom, unlimited storage. Get it now, on http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/

Re: [Gnuplot-py-users] how to draw a 3D graphic?

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

2008/4/13, zhang chi <zha...@gm...>:
>
> hi
>    I have a 10X10 matrix in python, I want to draw a 3d graphic for this
> matrix by using gnuplot.py.


Zhang, gnuplot contains a test program with examples. Locate the gnuplot
data, and open the test.py file. There you will find code to test the
GridData way of using gnuplot. You find examples of what you want to do. For
your reference, a copy here of that test:

        # set up x and y values at which the function will be tabulated:
        x = numpy.arange(35)/2.0
        y = numpy.arange(30)/10.0 - 1.5
        # Make a 2-d array containing a function of x and y.  First create
        # xm and ym which contain the x and y values in a matrix form that
        # can be `broadcast' into a matrix of the appropriate shape:
        xm = x[:,numpy.newaxis]
        ym = y[numpy.newaxis,:]
        m = (numpy.sin(xm) + 0.1*xm) - ym**2
        wait('a function of two variables from a GridData file')
        g('set parametric')
        g('set data style lines')
        g('set hidden')
        g('set contour base')
        g.xlabel('x')
        g.ylabel('y')
        g.splot(Gnuplot.GridData(m,x,y, binary=0, inline=0))



How to do this work? I try the following code ,but it did not work.
>
> #!/usr/bin/env python
>
> import Gnuplot, Gnuplot.funcutils
> from numpy import *
> import time
>
> g = Gnuplot.Gnuplot(debug=1)
>
> g.set(xrange=(0,10))
> g.set(xrange=(0,10))
> g.set(zrange=(0,10))
> z = ones((10,10))
> g.splot('z')
> time.sleep(5)
>
>
>
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[Gnuplot-py-users] how to draw a 3D graphic?

[zhang c. <zha...@gm...>]

hi
   I have a 10X10 matrix in python, I want to draw a 3d graphic for this
matrix by using gnuplot.py.

How to do this work? I try the following code ,but it did not work.

#!/usr/bin/env python

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

g = Gnuplot.Gnuplot(debug=1)

g.set(xrange=(0,10))
g.set(xrange=(0,10))
g.set(zrange=(0,10))
z = ones((10,10))
g.splot('z')
time.sleep(5)

Re: [Gnuplot-py-users] How to use py-gnuplot?

[novakyu <no...@gm...>]

On Fri, Apr 11, 2008 at 6:21 PM, zhang chi <zha...@gm...> wrote:
>  g = Gnuplot.Gnuplot(debug=1)
> g('set key left box')
>  g('set samples 50')
> g.plot([[-10:10]],sin(x),atan(x),cos(atan(x)))
>  time.sleep(5)

According to Gnuplot documentation (try "help(Gnuplot.Gnuplot.plot)"),
the arguments to the plot() has to be either a PlotItem object or a
string (or something that can be convertible to those).

Changing the g.plot command to

g.plot('sin(x)', 'atan(x)', 'cos(atan(x))')

seems to work, and it seems rather silly to specify [-10:10], given
that that's the default range, but if you need to, you can probably do
it by issuing a command to set xrange to what you want.

Regards,

Andrzej

P.S. I think py-gnuplot has many of the common functions and methods
built-in---what you have here as raw gnuplot command probably can be
written in terms of methods provided by py-gnuplot, although the end
result is more or less the same.

[Gnuplot-py-users] How to use py-gnuplot?

[zhang c. <zha...@gm...>]

hi
I am a beginner to use py-gnuplot, here are gnupot commands, and I want to
realize them in py-gnuplot, but my program can't run.

gnuplot:

set key left box
set samples 50
plot [-10:10] sin(x),atan(x),cos(atan(x))



my program:
#!/usr/bin/env python
import Gnuplot, Gnuplot.funcutils
from numpy import *
import time

g = Gnuplot.Gnuplot(debug=1)
g('set key left box')
g('set samples 50')
g.plot([[-10:10]],sin(x),atan(x),cos(atan(x)))
time.sleep(5)

Re: [Gnuplot-py-users] help test 1.8

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

Mark Alford wrote:
> I have been using gnuplot-py-1.7 for many years.
> I would like to help testing/development of gnuplot-py-1.8 under Fedora 
> Core Linux. But I don't know how to get the latest version. I have never 
> used subversion.
> 
> Could someone tell me a simple series of steps for downloading
> the latest version of the code?

Your help is much appreciated.  It's been a long time since Gnuplot.py
has had any serious maintenance.

To check out the current trunk version, type:

svn co https://gnuplot-py.svn.sourceforge.net/svnroot/gnuplot-py/trunk
gnuplot-py

This will create a subdirectory called "gnuplot-py" under your current
directory containing the current cvs2svn source code.

Once you have made some changes, you can create a patch by typing "svn
diff" in the gnuplot-py directory.  Please test any changes against the
test suite to make sure you haven't broken anything.

Michael

[Gnuplot-py-users] help test 1.8

[Mark A. <al...@wu...>]

I have been using gnuplot-py-1.7 for many years.
I would like to help testing/development of gnuplot-py-1.8 under Fedora 
Core Linux. But I don't know how to get the latest version. I have never 
used subversion.

Could someone tell me a simple series of steps for downloading
the latest version of the code?

Thank you

Mark

[Gnuplot-py-users] bug in write_array for 2d case ?

[Andriy G. <av...@ic...>]

It seems that there is a bug in Gnuplot/utils.py write_array for the
case of 2 dimensional array.
I use gnuplot.py 1.7 with python 2.5 on FreeBSD.

        for point in set[1:]:
            f.write(nest_sep + nest_prefix)
            f.write(fmt % tuple(point.tolist()))

I think that write_array is called with array as a parameter, not a
regular list and it seems that slice syntax is not exactly applicable to
arrays in the same way as it is for lists.
It seems that no iterations actually happened and only data for set[0]
was written to a file.

I had to change the quoted code to the following:
        for point in set.tolist()[1:]:
            f.write(nest_sep + nest_prefix)
            f.write(fmt % tuple(point))


The problem was doing stuff like the following:
x = Numeric.arange(10) / 10.
y = Numeric.sin(x)
g = Gnuplot.Gnuplot()
g.plot(Gnuplot.Data(x,y))

Only one point was plotted.

P.S. I think that this link pretty well describes things for python 2.5
and Numeric (array):
http://projects.scipy.org/pipermail/numpy-discussion/2006-November/024428.html

-- 
Andriy Gapon

Re: [Gnuplot-py-users] 2nd Histogram on top of the first one

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

Mustafa Burak Boz wrote:
> I want to plot a second histogram on the top the first one. Is there a
> way to do that with gnuplot.py ?

Sorry, I don't think gnuplot even supported histograms when Gnuplot.py
was written, and right now nobody is actively maintaining Gnuplot.py.
(Volunteers always welcome!)

Michael

[Gnuplot-py-users] 2nd Histogram on top of the first one

[Mustafa B. B. <mbu...@gm...>]

Hi there,
I want to plot a second histogram on the top the first one. Is there a  
way to do that with gnuplot.py ?

here is the script that I use to generate the first histogram:

     g=Gnuplot.Gnuplot(persist=1)

     max_x=find_max_x(x_y)
     max_y=find_max_y(x_y)

     g("set style data histograms ")
     g("set style fill solid 1.0 border -1")

     g("set xrange [0:"+str(max_x)+"]")
     g("set yrange [0:"+str(max_y+10)+"]")

     graph=Gnuplot.Data(x_y,with="boxes 3")
     g.plot(graph)
     g.hardcopy(of1+".ps",enhanced=1,color=1)

In the Gnuplot manual, it is described like this:

	newhistogram  { "title" } { <linestyle> }. For example
	set style histogram cluster
	plot newhistogram "Set A", ’a’ using 1, ’’ using 2, ’’ using 3, \
	newhistogram "Set B", ’b’ using 1, ’’ using 2, ’’ using 3

How can I do this in gnuplot.py and does g.hardcopy method give me the  
graph of 2 hostograms ?

Thank in advance...
mbb

Re: [Gnuplot-py-users] Unexpected problem when a many gnuplot windowsare open simultaneously

[Chip W. <cw...@ly...>]

I ran into a similar issue about a year ago using gnuplot.py on
cygwin/windows (with a Intel Core Duo).  I remember solving it in a similar
manner with the delay and then using something slightly different like
waiting for the call to return before moving on.  

-chip


-- On Thursday, January 31, 2008 3:43 PM 
-- kk...@ma... wrote:
> When I try to open more than 6 gnuplot windows at the same time I get
> following issues: 
> - new windows aren't opened
> - gnuplot 'save' doesn't work
> 
> I suppose that problem is in gnuplot perfomance. I mean that gnuplot
> get new request before old request is not yet proccessed. Or maybe it
> is SMP issue cause I have Intel Core Duo. Anyway, I've found some
> workaround: I've modified __call__ method with short delay. I know
> it's ugly but it works   
> 
>     def __call__(self, s):
>         """Send a command string to gnuplot.
> 
>         Send the string s as a command to gnuplot, followed by a
>         newline.  All communication with the gnuplot process (except
>         for inline data) is through this method.
> 
>         """
> 
>         self.gnuplot(s)
>         if self.debug:
>             # also echo to stderr for user to see:
>             sys.stderr.write('gnuplot> %s\n' % (s,))
>             time.sleep(0.1);
> 
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