Individually labeled bars for bar graphs

Question

I am trying to create bar graphs of letter frequency in Python. I thought the best way to accomplish this would be matplotlib, but I have been unable to decipher the documentation. Is it possible to label the bars of a matplotlib.pyplot.hist plot with one letter per bar, instead of a numerical axis? I think it must be, but I have not used matplotlib before.

This is the sort of graph I'm after, rendered as text:

|
|    *
|    *  *
| *  *  *
+----------
  A  B  C

Subtropics

Answer 1

Sure is! You just need to reset the tick labels.

EDIT with answer and picture (can be done similarly with hist):

x = scipy.arange(4)
y = scipy.array([4,7,6,5])
f = pylab.figure()
ax = f.add_axes([0.1, 0.1, 0.8, 0.8])
ax.bar(x, y, align='center')
ax.set_xticks(x)
ax.set_xticklabels(['Aye', 'Bee', 'Cee', 'Dee'])
f.show()

_{(source: stevetjoa.com)}

Kissiah

You don't need to use scipy for this by the way, you can replace the first two lines with x = xrange(4) and y = [4,7,6,5]. – Forage

Thank you for align='center', I just spent an hour googling how to do that! – Madi