When I run this code
import pandas as pd import numpy as np def add_prop(group): births = group.births.astype(float) group['prop'] = births/births.sum() return group pieces =  columns = ['name', 'sex', 'births'] for year in range(1880, 2012): path = 'yob%d.txt' % year frame = pd.read_csv(path, names = columns) frame['year'] = year pieces.append(frame) names = pd.concat(pieces, ignore_index = True) total_births = names.pivot_table('births', rows = 'year', cols = 'sex', aggfunc = sum) total_births.plot(title = 'Total Births by sex and year')
I get no plot. This is from Wes McKinney's book on using Python for data analysis. Can anyone point me in the right direction?
import matplotlib.pyplot as plt
at the top, and
at the end.
In the IPython notebook you could also use
%matplotlib inline at the top of the notebook to automatically display the created plots in the output cells.