matplotlib Code

"""
You can precisely layout text in data or axes (0,1) coordinates.  This
example shows you some of the alignment and rotation specifications to
layout text
"""

from matplotlib.matlab import *
from matplotlib.lines import Line2D
from matplotlib.patches import Rectangle
from matplotlib.transforms import Transform

# build a rectangle in axes coords
left, width = .25, .5
bottom, height = .25, .5
right = left + width
top = bottom + height
ax = gca()
p = Rectangle(ax.dpi, ax.bbox,
              (left, bottom), width, height,
              fill=False,
              transx=ax.xaxis.transAxis,
              transy=ax.yaxis.transAxis)
p.set_clip_on(False)
ax.add_patch(p)


ax.text(left, bottom, 'left top',
        horizontalalignment='left',
        verticalalignment='top',
        transx=ax.xaxis.transAxis,
        transy=ax.yaxis.transAxis)

ax.text(left, bottom, 'left bottom',
        horizontalalignment='left',
        verticalalignment='bottom',
        transx=ax.xaxis.transAxis,
        transy=ax.yaxis.transAxis)

ax.text(right, top, 'right bottom',
        horizontalalignment='right',
        verticalalignment='bottom',
        transx=ax.xaxis.transAxis,
        transy=ax.yaxis.transAxis)

ax.text(right, top, 'right top',
        horizontalalignment='right',
        verticalalignment='top',
        transx=ax.xaxis.transAxis,
        transy=ax.yaxis.transAxis)

ax.text(right, bottom, 'center top',
        horizontalalignment='center',
        verticalalignment='top',
        transx=ax.xaxis.transAxis,
        transy=ax.yaxis.transAxis)

ax.text(left, 0.5*(bottom+top), 'right center',
        horizontalalignment='right',
        verticalalignment='center',
        rotation='vertical',
        transx=ax.xaxis.transAxis,
        transy=ax.yaxis.transAxis)

ax.text(left, 0.5*(bottom+top), 'leftcenter',
        horizontalalignment='left',
        verticalalignment='center',
        rotation='vertical',
        transx=ax.xaxis.transAxis,
        transy=ax.yaxis.transAxis)

ax.text(0.5*(left+right), 0.5*(bottom+top), 'middle',
        horizontalalignment='center',
        verticalalignment='center',
        transx=ax.xaxis.transAxis,
        transy=ax.yaxis.transAxis)

ax.text(right, 0.5*(bottom+top), 'centered',
        horizontalalignment='center',
        verticalalignment='center',
        rotation='vertical',
        transx=ax.xaxis.transAxis,
        transy=ax.yaxis.transAxis)

axis('off')
#savefig('alignment_test', dpi=300)
show()