Hi,
I'm trying to make my first matplotlib-plot from a datafile. The
datafile is tab-separated and looks like this:
# x-axis y-axis
0 1
1 2
2 3
3 4
4 5
5 6
So my ploting-script is:
#!/usr/bin/env python
from pylab import *
import numpy as np
inputfile = '/home/manu/matplotlib-examples/simple_plot.py'
x,y = np.loadtxt(inputfile, dtype='float', comments='#',
delimiter="\t", converters=None, skiprows=0, usecols=(0,1),
unpack=True)
plot(x, y, linewidth=1.0)
xlabel('time (s)')
ylabel('voltage (mV)')
title('About as simple as it gets, folks')
grid(True)
show()
It worked fine for me once, but as I tried to start the script again I
get an IndexError:
Traceback (most recent call last):
File "./simple_plot.py", line 7, in <module>
x,y = np.loadtxt(inputfile, dtype='float', comments='#',
delimiter="\t", converters=None, skiprows=0, usecols=(0,1),
unpack=True)
File "/usr/lib/python2.6/dist-packages/numpy/lib/io.py", line 486, in loadtxt
vals = [vals[i] for i in usecols]
IndexError: list index out of range
Seems to me that usecols has "to much input" (don't know how to call
it), but why did it work before?
Manuel
------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
trial. Simplify your report design, integration and deployment - and focus on
what you do best, core application coding. Discover what's new with
Crystal Reports now. http://p.sf.net/sfu/bobj-july
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
