[Matplotlib-users] errorbar with one value + scatter

[Arnold M. <arn...@wu...>]

Dear all,

Praise for this first serious python plotting package!

I have two minor comments:

-> when I try to do an errorbar plot with a scalar, rather than an array 
as the argument (i.e. errorbar(scalar_x, scalar_y, xerr=scalar_xerr)) I 
get the following error message:

"/usr/lib/python2.3/site-packages/matplotlib/axes.py", line 569, in errorbar
     right = x+xerr[1]
IndexError: index out of bounds

This is due to the fact that the length of xerr is tested only to be 1 
or greater than 1 (asymmetric errors). However, the option that I would 
like to plot just one point is not included. So an extra if-clause is 
needed before the present code that checks whether x and xerr are arrays 
or not.

-> I very much like the option for scatter to color the blobs to be 
plotted. However, I have an application where the shape of the blobs is 
immaterial: I would rather have filled circles (or even better: filled 
symbols, be it circles, triangles ...). Anyhow: I would like them to be 
symmetric irrespective of the range of the axes. One option would be to 
allow the s-keyword to be allowed to be negative, where negative means: 
symmetric and the value of the negative number being the size relative 
to some default size.

Thanks and keep up the good work,

Arnold Moene