gnuplot-py-users Mailing List for Gnuplot.py

Kelvin Chu wrote:
> I use gnuplot-py very often because it is better suited to most of my
> tasks than other python plotting routines.  That much said, I am getting
> warnings 
> 
> Warning: 'with' will become a reserved keyword in Python 2.6
> 
> I have 3 questions.
> 
> 1.  Is there any way to turn off these warnings?
> 2.  Should I be using a different way of setting linetypes, etc. for
> plotting?
> 
> d = Gnuplot.Data(x,y,with='lines lt 4')
> 
> 3.  Is Gnuplot.py going to replace the 'with' keyword?

I just committed a change to Gnuplot.py in r299 of trunk which allows
client code to name the option "with_" (note trailing underscore) to
avoid warnings and errors with newer versions of Python.  I also changed
the Gnuplot.py code itself so that it does not use "with" as an identifier.

However, for backwards compatibility (and through the magic of Python
varargs processing), Gnuplot.py still accepts "with" as an alternative
spelling of this option.  Thus this change should not break old clients.

Regarding your questions:

1. This change should get rid of the warnings, assuming you change your
code accordingly.

2. Rename 'with' -> 'with_'

3. Done.

Michael

Hi there;

I use gnuplot-py very often because it is better suited to most of my  
tasks than other python plotting routines.  That much said, I am  
getting warnings

Warning: 'with' will become a reserved keyword in Python 2.6

I have 3 questions.

1.  Is there any way to turn off these warnings?
2.  Should I be using a different way of setting linetypes, etc. for  
plotting?

	d = Gnuplot.Data(x,y,with='lines lt 4')

3.  Is Gnuplot.py going to replace the 'with' keyword?

Thanks very much.

-k


--
Department of Physics, Cook Building, University of Vermont
82 University Place, Burlington VT 05405-0125
http://www.uvm.edu/~kchu/; (802) 656-0064; Fax: (802) 656-0817

V.Shenoy wrote:
> I am pretty new to Gnuplot and I have installed Gnuplot.py recently. I
> am getting the following bug when i run the test.py...
>  
>   File "test.py", line 284, in ?
>     main()
>   File "test.py", line 64, in main
>     g.plot(Gnuplot.Func('sin(x)'))
>   File "C:\Python22\Gnuplot\_Gnuplot.py", line 274, in plot
>     self.refresh()
>   File "C:\Python22\Gnuplot\_Gnuplot.py", line 215, in refresh
>     self(self.plotcmd + ' ' + string.join(plotcmds, ', '))
>   File "C:\Python22\Gnuplot\_Gnuplot.py", line 199, in __call__
>     self.gnuplot(s)
>   File "C:\Python22\Gnuplot\gp_win32.py", line 125, in __call__
>     self.write(s + '\n')
> IOError: [Errno 22] Invalid argument
>  
> Kindly help...

This usually means that pgnuplot.exe is either not installed or not in
your PATH.

Michael

Hello,

I am pretty new to Gnuplot and I have installed Gnuplot.py recently. I =
am getting the following bug when i run the test.py...

  File "test.py", line 284, in ?
    main()
  File "test.py", line 64, in main
    g.plot(Gnuplot.Func('sin(x)'))
  File "C:\Python22\Gnuplot\_Gnuplot.py", line 274, in plot
    self.refresh()
  File "C:\Python22\Gnuplot\_Gnuplot.py", line 215, in refresh
    self(self.plotcmd + ' ' + string.join(plotcmds, ', '))
  File "C:\Python22\Gnuplot\_Gnuplot.py", line 199, in __call__
    self.gnuplot(s)
  File "C:\Python22\Gnuplot\gp_win32.py", line 125, in __call__
    self.write(s + '\n')
IOError: [Errno 22] Invalid argument

Kindly help...

Thanks in advance

Best regards
Vikram
------------------------------------------
PhD Student
Wolfson School of Mechanical and Manufacturing Engg.
Loughborough University,
Leics,
LE11 3TU
Tel: +44 1509 22 7534
Email: V.S...@lb...
Web : =
http://www.lboro.ac.uk/departments/mm/research/mechanics-adv-materials/in=
dex.html

I've been using gnuplot-py to plot 2D and 3D wireframes for a
while.  Now I need to make my programs a little more
interactive: the user needs to be able to select lines and
points by clicking on them with a mouse.  I have found examples
of how to do this in Python:

http://www.physik.tu-dresden.de/~baecker/python/GnuplotBiDir.py

However, that Gnuplot class doesn't have many of the features
of gnuplot-py.  I'm thinking it would be easier to add
mouse-click handling to gnuplot-py than it would be to change
my programs to use the above class for the plotting.

Has anybody else worked on supporting mouse interaction using
gnuplot-py?

-- 
Grant Edwards
gr...@vi...

I am trying to figure out how to plot 3D data.  I began with the script "
demo.py" that comes with the gnuplot-py distribution.  I am only changing
what function is plotted but I get the error copied at the end of this
email.  I am using just a minimal script (also copied below).  The formula
for m which is commented out does not work, but the current formula for m
does work.  Can someone help me understand what the problem is?

Thanks,

Jeremy



import scipy
import Gnuplot

def main():
    x = scipy.arange(35)/2.0
    y = scipy.arange(30)/10.0-1.5
    xdat = x[:,None]
    ydat = y[None,:]
    m = (scipy.sin(xdat) + 0.1*xdat) - ydat**2
#   m = scipy.sin(scipy.sqrt(xdat**2+ydat**2))/scipy.sqrt(xdat**2+ydat**2)
    print "len(x): %s" %len(x)
    print "len(y): %s" %len(y)
    print "len(m): %s" %len(m)
    dat = Gnuplot.GridData(m,x,y, binary=0)

    Chart = Gnuplot.Gnuplot(debug=1)
    Chart('set pm3d')
    Chart('set parametric')
    Chart('set data style lines')
    Chart('set hidden')
    Chart('set contour base')
    Chart.splot(dat)


main()


python learnGnuplot.py
len(x): 35
len(y): 30
len(m): 35
gnuplot> set terminal aqua
gnuplot> set parametric
gnuplot> set data style lines
gnuplot> splot "/tmp/tmpf2ZHuU.gnuplot/fifo" notitle

gnuplot> splot "/tmp/tmpf2ZHuU.gnuplot/fifo" notitle
               ^
         line 0: 2 columns only possible with explicit pm3d style (line 16)

Exception in thread FIFO Writer for /tmp/tmpf2ZHuU.gnuplot/fifo:
Traceback (most recent call last):
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/threading.py",
line 460, in __bootstrap
    self.run()
  File
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/Gnuplot/PlotItems.py",
line 448, in run
    f.write(self.content)
IOError: [Errno 32] Broken pipe