plot window does not open

Community matplotlib-users
1

Hello,
   I am running Python 2.5.2 on Fedora Core 7. recently removed
previous versions of Scipy and Numpy (installed previously using YUM),
and compiled and installed their latest versions using the source
code. i also installed MatPlotLib from source. their versions are
given below:

Python 2.5.2
Numpy 1.1.0
Scipy 0.6.0
MatPlotLib 0.98.3
WxPython

   I try simple plot commands as the ones below. however, no plot
window appears anywhere. i think i am doing something really silly
here, like not linking to backend (see the error message below). i
have looked at matplotlibrc file in my home area
~/matplotlib/.matplotlibrc

   plz suggest some remedy.

   thanks,
        ashish

--------------------------------------- code
import matplotlib.pyplot as plt
plt.plot([1,2,3])
plt.ylabel('some numbers')
plt.show()

···

-------------------------------------------

------------------------------------------- response in Python

Python 2.5 (r25:51908, Nov 6 2007, 16:54:01)
[GCC 4.1.2 20070925 (Red Hat 4.1.2-27)] on linux2
Type "help", "copyright", "credits" or "license" for more information.

import matplotlib.pyplot as plt
plt.plot([1,2,3])

[<matplotlib.lines.Line2D object at 0xa7ff2cc>]

plt.ylabel('some numbers')

<matplotlib.text.Text object at 0xa7d21ec>

plt.show()

-------------------------------------------

--
-----------------------------------------------------------------------------
Dr. Ashish Asgekar
Physics Group,
BITS Pilani-Goa Campus,
Zuarinagar, Goa.
India 403 726

Ph: +91-832-2580 410
     : +91-832-2557 024
Fx: +91-832--255 7033

www.bits-goa.ac.in/Departments/Physics/Faculty.htm
-----------------------------------------------------------------------------

2

I didn't see any error messages in your mail...

You can determine the backend you're set to by doing:

>>> import matplotlib
>>> matplotlib.get_backend()
'GTKAgg'

If it's 'PDF', 'Ps', 'SVG', 'Agg', or 'Cairo', it's a non-gui backend, and therefore no gui window will be displayed.

This is usually set by the "backend" parameter in ~/.matplotlib/matplotlibrc.

Often the default backend is set to Agg if no GUI frameworks were found at compile time. Given the recent version of matplotlib you're running, I assume you built from source? You may need to install a gui framework (from Fedora's yum repos should be recent enough) and rebuild matplotlib.

Mike

Ashish Asgekar wrote:

···

Hello,
   I am running Python 2.5.2 on Fedora Core 7. recently removed
previous versions of Scipy and Numpy (installed previously using YUM),
and compiled and installed their latest versions using the source
code. i also installed MatPlotLib from source. their versions are
given below:

Python 2.5.2
Numpy 1.1.0
Scipy 0.6.0
MatPlotLib 0.98.3
WxPython

   I try simple plot commands as the ones below. however, no plot
window appears anywhere. i think i am doing something really silly
here, like not linking to backend (see the error message below). i
have looked at matplotlibrc file in my home area
~/matplotlib/.matplotlibrc

   plz suggest some remedy.

   thanks,
        ashish

--------------------------------------- code
import matplotlib.pyplot as plt
plt.plot([1,2,3])
plt.ylabel('some numbers')
plt.show()
-------------------------------------------

------------------------------------------- response in Python

Python 2.5 (r25:51908, Nov 6 2007, 16:54:01)
[GCC 4.1.2 20070925 (Red Hat 4.1.2-27)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
  

import matplotlib.pyplot as plt
plt.plot([1,2,3])
        

[<matplotlib.lines.Line2D object at 0xa7ff2cc>]
  

plt.ylabel('some numbers')
        

<matplotlib.text.Text object at 0xa7d21ec>
  

plt.show()
        

-------------------------------------------

--
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA