That's what ``scatter`` is intended for.
Basically, you want something like:
plt.scatter(x, y, c=z, marker='s')
plt.colorbar()
Note that you can also vary the markers by size based on an additional
parameter, as well.
Have a look at this example:
http://matplotlib.org/examples/pylab_examples/scatter_demo.html
Hope that helps,
-Joe
On Fri, Oct 19, 2012 at 2:19 PM, elmar werling <el...@net4werling.de> wrote:
> Hi,
>
> is there a way to adjust the marker color in a xy-plot in relation to
> the value of a third parameter. Something as the following - not working
> - example 1.
>
> Example 2 is working but rather slow for large arrays.
>
> cheers
> Elmar
>
>
>
>
> # example 1
>
> import matplotlib.pyplot as plt
>
> x = [1,2,3,4]
> y = x
> c = ((1.0, 0.0, 0.0), (0.8, 0.1, 0.1), (0.6, 0.2, 0.6), (0.4, 0.3, 0.3))
>
> plt.plot(x,y, color=c, marker='s')
> plt.show()
>
>
> example 2:
>
> import matplotlib.pyplot as plt
>
> x = [1,2,3,4]
> y = x
> c = ((1.0, 0.0, 0.0), (0.8, 0.1, 0.1), (0.6, 0.2, 0.6), (0.4, 0.3, 0.3))
>
> for i in range(len(x)):
> plt.plot(x[i], y[i], color=c[i], marker='s')
>
> plt.show()
>
>
>
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