Locator and tcks question

Dear all,

I have the following data:
X = [0.0, 1.0, 3.0, 6.0, 10.0, 15.0]
Y = [0.0, 1.0, 2.0, 3.0, 4.0, 5.0]

I can plot the X-Y curve without problem.

But is there a way for me to make the xticks spaced
evenly? That is, the distance between 0.0 and 1.0, 1.0
and 3.0, 3.0 and 6.0, ... along the x-axis are the
same.

I tried LinearLocator, IndexLocator, but did not work.

Please help! Thanks!
Cheng-Kong

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Cheng-Kong Wu wrote:

Dear all,

I have the following data:
X = [0.0, 1.0, 3.0, 6.0, 10.0, 15.0]
Y = [0.0, 1.0, 2.0, 3.0, 4.0, 5.0]

I can plot the X-Y curve without problem.

But is there a way for me to make the xticks spaced
evenly? That is, the distance between 0.0 and 1.0, 1.0
and 3.0, 3.0 and 6.0, ... along the x-axis are the
same.

What you are really doing, then, is plotting Y not against X but against an index, like this:

from pylab import *
X = [0.0, 1.0, 3.0, 6.0, 10.0, 15.0]
Y = [0.0, 1.0, 2.0, 3.0, 4.0, 5.0]
xi = arange(len(X))
xtlabel = ['%.1d'%x for x in X] # or [str(x) for x in X]
plot(xi, Y)
ax = gca()
ax.set_xticks(xi)
ax.set_xticklabels(xtlabel)
show()

Is this what you want?

Eric