I have written a small application using PyQt4 and matplotlib.  Currently, 
I use the axes.add_line(Line2D Instance) to interact with the plot 
canvas.  I am interested in allowing the user to add or remove error bars 
to the plot, but am unable to find a command to do so (e.g. set_yerr(self, 
numpy_array)).  I am partial to the add_line() command as it allows me to 
create a Line2D instance with all of the relevant features (such as color, 
markersize etc.) and would like to avoid the pylab.errorbar() command.  
Does anyone have a solution to make error bars through matplotlib API?  

Cheers,

Brian






      
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