It does, and you are exactly right, letting the legend "grow" downward while
holding the value of the lower left corner doesn't make sense.. I tried
calculating an offset, but the patch is a much nicer fix!
On Thu, Feb 26, 2009 at 9:27 PM, Jae-Joon Lee <lee.j.joon@...> wrote:
> On Thu, Feb 26, 2009 at 4:51 AM, Søren Nielsen
> <soren.skou.nielsen@...> wrote:
> > I've tried placing a legend using the loc = (x,y) .. and the legend is
> > where I want it. the problem is, when I add new lines to the plot.. the
> > legend grows, but upwards.. so the lower left point of the legend box is
> > constant.. but that's not the logical way for a legend box to grow..
> > shouldn't it grow downwards, just like when I use the standard loc = 1
> > (upper right position) .
> Well, technically, legend never grows. Whenever you call legend(), a
> new legend instance is created and the old one is just destroyed.
> Anyhow, as far as I can tell, the (x,y) coordinates given to the *loc*
> parameter has been the coordinate of the lower left corner of the
> legend (but I don't think this is clearly specified in the
> documentation). Therefore, I don't think it is a good idea to make the
> legend grow(?) downward while you're supplying a fixed coordinate of
> the lower left corner. This is hardly possible and it seems to make
> little sense to me.
> Anyhow, I just submitted a patch to the svn that add an optional
> *bbox_to_anchor* argument for the legend class. This lets you specify
> the bbox that the legend will be anchored (the default is the bbox of
> the parent).
> For example,
> legend(loc="upper left", bbox_to_anchor=[0.0, 0.5])
> will create an legend with its upper left corner at (0.0, 0.5), and it
> will grow downward. Note that when len(bbox_to_anchor)==2, a bbox with
> zero width and zero height is created.
> I hope this suits your need.
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