Add legends to plot.py

[sagetrac-anakha]

Add support for placing legends on plots using the matplotlib facility for doing so.

CC: @kcrisman @sagetrac-slosoi @novoselt @sagetrac-abergeron @jhpalmieri @sagetrac-mvngu

Component: graphics

Author: Arnaud Bergeron, Karl-Dieter Crisman

Reviewer: Jason Grout, Mike Hansen, Karl-Dieter Crisman

Merged: sage-4.6.alpha3

Issue created by migration from https://trac.sagemath.org/ticket/4342

[sagetrac-anakha]

Attachment: trac_4342.patch.gz

[sagetrac-anakha]

comment:1

Add the option to put legends on plots.

Also fixes three long test markers that where reading #long rather than #long time and two or three minor documentation mistakes elsewhere in the code. These where bundled because they don't warrant a separate ticket for me but are still nice to fix.

[sagetrac-anakha]

comment:2

New patch to pass options around in a better way. Also now use @suboptions marker from #4203 so you need to apply that patch first.

[sagetrac-anakha]

Attachment: trac_4342-2.patch.gz

[sagetrac-mvngu]

comment:3

For the patch trac_4342.patch, here are possible fixes to your documentation:

-denoting a color or an rgb tuple. The string can be a color name
+denoting a color or an RGB tuple. The string can be a color name

-If called with no input return the current legend setting.
+If called with no input, return the current legend setting.

-Sets the legend label font
+Sets the legend label font.

-form is just a floating point rgb tuple with all values ranging
+form is just a floating point RGB tuple with all values ranging

[TimothyClemans]

Attachment: trac_4342-3.patch.gz

mvngu's doc fixes

[TimothyClemans]

comment:4

Replying to @sagetrac-mvngu:

For the patch trac_4342.patch, here are possible fixes to your documentation:

-denoting a color or an rgb tuple. The string can be a color name
+denoting a color or an RGB tuple. The string can be a color name

-If called with no input return the current legend setting.
+If called with no input, return the current legend setting.

-Sets the legend label font
+Sets the legend label font.

-form is just a floating point rgb tuple with all values ranging
+form is just a floating point RGB tuple with all values ranging

I uploaded a patch with these fixes.

Mvngu, in the future please upload patches with your doc fixes. Thanks :)