I have some question on the legend.

the first is perhaps a bug:

I was trying something like:


I can't obtain a legend, instead I have an error
message. So perhaps I didn't understand at all the
message I obtain with: help(legend) (it's possible
with my poor english :slight_smile: ) or there are a problem.

second things:
I would like to have the box create by the legend
commande behind my plot and not above because it hide
some of the point. Perhaps another solution is to put
the box bacground in "alpha mode" but I don't know how
to do this.

I will appreciate a lot your help, thanks.


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