[Matplotlib-users] How to get the value of a cell in pcolormesh

[GoogleWind <goo...@16...>]

Hi everyone!
It is cool to use the pcolormesh in matplotlib. However, is there a way to
get the i, j indexes of the clicked cell?  I have try event.mouseevent.xdata
and event.mouseevent.x. But they did not return the index I need.

Thanks in advanced for your help.

Dr. Jiacong Huang
Nanjing Institute of Geography & Limnology
Chinese Academy of Sciences
73 East Beijing Road, Nanjing 210008, China
Tel./Fax: +86-25-86882127
Homepage: http://www.escience.cn/people/elake/index.html



---Code to generate pcolormesh-------------------------------
import numpy as np
from matplotlib.pyplot import figure, show
from numpy import ma

n = 12
x = np.linspace(-1.5,1.5,n)
y = np.linspace(-1.5,1.5,n*2)
X,Y = np.meshgrid(x,y);
Qx = np.cos(Y) - np.cos(X)
Qz = np.sin(Y) + np.sin(X)
Qx = (Qx + 1.1)
Z = np.sqrt(X**2 + Y**2)/5;
Z = (Z - Z.min()) / (Z.max() - Z.min())

# The color array can include masked values:
Zm = ma.masked_where(np.fabs(Z) > 100, Z)

fig = figure()
ax = fig.add_subplot(111)
col = ax.pcolormesh(Qx[:5,:4],Qz[:5,:4],Zm[:4,:3])
show()
-------------------------



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