[SciPy-user] re: gplt fails

camartin at snet.net camartin at snet.net
Tue Dec 2 16:55:44 CST 2003

"Hetal Patel" <hetal75 at hotmail.com> wrote:

Whenever I try to plot complex data using either plt or gplt from any pyhton 
shell(Python,PythonWin,IDLE,PyCrust). windows reports that pythonw has 

I know that it's a bit unfair to ask the plot routines to plot complex data 
but I would expect an error, not python to crash.

I'm running the latest SciPy release on Windows XP.

Example code below crashes.

You probably want to plot the modulus of the complex number.  It's interesting that if you use plt.plot(b) it gives you an error message that the array is complex then plots the modulus of b for you!  Nice error trapping. gplt failes as you say.


>>>>>from scipy import *
>>>>>>a = arange(1,10,0.2)
>>>>>>b = a + 2.j
array([ 1. +2.j, 1.2+2.j, 1.4+2.j, 1.6+2.j, 1.8+2.j, 2. +2.j, 2.2+2.j, 
2.4+2.j, 2.6+2.j, 2.8+2.j, 3. +2.j, 3.2+2.j, 3.4+2.j, 3.6+2.j, 3.8+2.j, 
4. +2.j, 4.2+2.j, 4.4+2.j, 4.6+2.j, 4.8+2.j, 5. +2.j, 5.2+2.j, 5.4+2.j, 
5.6+2.j, 5.8+2.j, 6. +2.j, 6.2+2.j, 6.4+2.j, 6.6+2.j, 6.8+2.j, 7. +2.j, 
7.2+2.j, 7.4+2.j, 7.6+2.j, 7.8+2.j, 8. +2.j, 8.2+2.j, 8.4+2.j, 8.6+2.j, 
8.8+2.j, 9. +2.j, 9.2+2.j, 9.4+2.j, 9.6+2.j, 9.8+2.j])

At this point python\pythonw crashes with the following error 
"python.exe has encountered a problem and needs to close. We are sorry 
for the inconvenience." If anyone can help me resolve this then I would 
greatly appreciate it.

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