Here is the example that I believe that does what you want.
The way it does is very similar to how legend object is created.
Unfortunately, the offsetbox module, which enables this example, is
not well documented. I hope the example is explanatory enough.
IHTH,
-JJ
import matplotlib.pyplot as plt
from matplotlib.offsetbox import TextArea, DrawingArea, HPacker, AnnotationBbox
import matplotlib.lines as mlines
ax = plt.subplot(111)
fontsize=15
box1 = TextArea("This is the square marker :", textprops=dict(color="k",
size=fontsize))
# create a drwaing area for a marker
# It will have width*height = fontsize*0.8fontsize
# and xdescent, ydescent = 0*0.2fontsize
box2 = DrawingArea(fontsize, 0.8*fontsize,
0, 0.2*fontsize)
# maker
l1 = mlines.Line2D([0.5*fontsize], [0.25*fontsize], marker="s",
markersize=(0.5*fontsize))
# add the marker to the drawing area
box2.add_artist(l1)
# now combine the textarea and the drawing area (marker)
box = HPacker(children=[box1, box2],
align="baseline",
pad=0, sep=fontsize*0.2)
# Use AnnotationBbox object using *box*. Note that the AnnotationBbox
is very similar to annotate. It uses offsetbox object instead of the
text object
a_box = AnnotationBbox(box, xy=(0., 1.),
xycoords='data',
xybox=(fontsize, -fontsize),
boxcoords="offset points",
box_alignment=(0., 1),
frameon=True,
)
ax.add_artist(a_box)
plt.show()
On Wed, Nov 24, 2010 at 1:22 AM, Alejandro Weinstein
<alejandro.weinst...@gmail.com> wrote:
> Hi:
>
> I want to use the symbol corresponding to a marker in a text
> annotation. Something like
>
> textstr = 'This is the square marker: ?'
> ax.text(0.05, 0.95, textstr)
>
> Is there something I can place where the question mark is above to get
> the actual square (or any other of the symbols you can use as a
> marker)?
>
> This is similar to what the legend command does, but I need more flexibility.
>
> Alejandro.
>
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