[SciPy-user] Plotting an array
John Hunter
jdhunter at ace.bsd.uchicago.edu
Tue Oct 10 12:59:29 CDT 2006
>>>>> "John" == John Hunter <jdhunter at ace.bsd.uchicago.edu> writes:
>>>>> "Andrew" == Andrew B Young <andrew.young at sri.com> writes:
Andrew> Gael, The following little program-- -- test.py
Andrew> ---------------------- | from scipy import arange, sin,
Andrew> pi, interpolate | from pylab import plot, show, savefig |
Andrew> t = arange(0, 2.0, 0.1) | plot(t) | savefig('test.png')
Andrew> Produces the plot at http://polar.sri.com/~ayoung/test.png
Andrew> Why does the plot "turn on" at one? If I, plot( [ 0. ,
Andrew> 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1. , 1.1,
Andrew> 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9] ) I get what I
Andrew> would expect: http://polar.sri.com/~ayoung/test2.png
John> This looks odd; one possibility is that you are mixing your
John> numerix packages. Check you matplotlib rc setting. If you
Yep, that's it. I can reproduce it with an old Numeric and a newish
numpy/scipy. The combination of versions below exposes the problem if
your rc setting is Numeric. Either of the suggested changes I made in
my last post will fix your problem.
In [5]: import numpy; numpy.__version__ Out[5]: '0.9.6.2138'
In [6]: import scipy; scipy.__version__
Out[6]: '0.4.7.1617'
In [7]: import Numeric; Numeric.__version__
Out[7]: '23.1'
JDH
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