Re: [Matplotlib-users] plot color as a function of values?

[Xavier G. <xav...@gm...>]

ax.plot(t[s>=0],s[s>=0],"g")
ax.plot(t[s<0],s[s<0],"r")


Whaou! That's what I call a nice pythonic syntax.

XAvier

> Maybe a little shorter is the where() keyword, and even that can be omitted:
>
> ax.plot(t[where(s>=0)],s[where(s>=0)],"g")
> ax.plot(t[where(s<0)],s[where(s<0)],"r")
>
> or, shorter:
>
> ax.plot(t[s>=0],s[s>=0],"g")
> ax.plot(t[s<0],s[s<0],"r")
>
> cheers
>
> Thomas
>
>
>
> Xavier Gnata-2 wrote:
>   
>> Hi,
>>
>> Imagine you have something like:
>>
>> from pylab import *
>> t = arange(0.0, 2.0, 0.01)
>> s = sin(2*pi*t)
>> ax = subplot(111)
>> ax.plot(t, s)
>>
>> That's fine but now I would like to plot the negative parts of the curve 
>> in red and the positive one in green.
>> Is there a nice pylab oriented way to do that? Some kind of "conditional 
>> formating"?
>>
>> Xavier
>>
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>
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