Hello,
I am trying to construct a contour plot where the contours are
separated by a constant amount but I would like a color bar (or
something) to show what the values of the different levels are. I will
have too many contours for clabels to be effective.
When I use colorbar with unequally spaced contours and use
cspacing=‘linear’ the ticks are spaced nicely but the colors are not.
The following code exemplifies the problem:
*#!/usr/bin/python*
from pylab import *
*#Compute Data*
delta = 0.025
x = arange(-3.0, 3.0, delta)
y = arange(-2.0, 2.0, delta)
X, Y = meshgrid(x, y)
Z1 = bivariate_normal(X, Y, 1.0, 1.0, 0.0, 0.0)
Z2 = bivariate_normal(X, Y, 1.5, 0.5, 1, 1)
*# difference of Gaussians*
Z = 100.0 * (Z2 - Z1)
*#Draw figure*
figure()
levels=[-9,-7.5,-5,-2.5,-0.5,0.5,2.5,5,7.5,9]
CS = contour( Z, levels,
origin='lower' ,
linewidths=2 ,
extent=(-3,3,-2,2))
clabel( CS,
inline=1 ,
fmt='%1.1f' ,
fontsize=14)
colorbar(CS,cspacing='linear') *# make a colorbar for the contour lines*
title("ColorBar lines don't match ticks")
savefig('BadColorBar')
show()
I have attached the file ‘BadColorBar.png’
Any help would be appreciated,
Karl Edler