Re: [Matplotlib-users] color xy plot

[John H. <jd...@gm...>]

On Fri, Jun 20, 2008 at 6:14 PM, sordnay <so...@gm...> wrote:
>
> Hi all,
> I'm trying to plot in 2D, 3 variables from time series, instead of volume I
> want color for the third variable.
> I have partial success with a scatter plot, but I'm unable to manage the
> colorbar so it represents z values,
> I needed to sort the variables and it's getting a bit ugly, so I though I
> might be missing some other function ?
> this is what I used:
>            pylab.figure()
>            x=self.stData.[items[0]]
>            y=self.stData.[items[1]]
>            z=self.stData.[items[2]]
>            points=zip(x,y)
>            points3=sorted(zip(z,points))
>            for i,p in enumerate(points3):
>                z[i]=p[0]
>                x[i]=p[1][0]
>                y[i]=p[1][1]
>            #colors=pylab.linspace(z.min(),z.max(),len(z)) did not work
>            colors=pylab.linspace(0,1,len(z))
>            pylab.scatter(x,y,c=colors,faceted=False)

Just pass c=z to scatter if z are the values you want to colormap.

JDH