File: load_converter.py

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from matplotlib.dates import strpdate2num
#from matplotlib.mlab import load
import numpy as np
from pylab import figure, show

dates, closes = np.loadtxt(
    '../data/msft.csv', delimiter=',',
    converters={0:strpdate2num('%d-%b-%y')},
    skiprows=1, usecols=(0,2), unpack=True)

fig = figure()
ax = fig.add_subplot(111)
ax.plot_date(dates, closes, '-')
fig.autofmt_xdate()
show()