Re: [Matplotlib-users] Legend and proxy artists

[Adam M. <ram...@gm...>]

On Fri, Oct 28, 2011 at 00:56, Sterling Smith <sm...@fu...> wrote:

> Here is a working example:
>
> from pylab import figure, arange
> fig = figure(1)
> fig.clear()
> ax = fig.add_subplot(111)
> x = arange(0,1,.25)
> y1 = x
> y2 = x**2
> y3 = x**3
> l1 = ax.plot(x,y1,'bo-')
> l2 = ax.plot(x,y2,'go-')
> l3 = []
> for xi,x1 in enumerate(x):
>  l3.append(ax.plot(x1,y3[xi],'ro-'))
> print l1,l2,l3
> leg = ax.legend((l1[0],l2[0],l3[0][0]),('$x$','$x^2$','$x^3$'),
>  numpoints=1, loc=0, borderpad=1, shadow=True, fancybox=True)

OK, you're example works but trying to modify my code is resulting in
the same errors. But it's late so that's a job for tomorrow...

> Note that when l1 and l2 are printed that they are 1-element lists, and l3 is a list of 1-element lists, all of which are not the type of handles that legend is looking for.  Furthermore, in your code, you are trying to embed these lists in yet another layer of list.

Thanks, this is starting to make sense...

> If  your code worked as it was with previous versions of matplotlib, then maybe someone with more knowledge could explain what changed to not allow your code to work now (it may be related to https://github.com/matplotlib/matplotlib/pull/534).

It worked without issue with matplotlib-1.0.1.

Cheers

Adam