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Make examples that load msft.csv robust against locale changes. #13061

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16 changes: 9 additions & 7 deletions examples/misc/load_converter.py
Original file line number Diff line number Diff line change
Expand Up @@ -4,19 +4,21 @@
==============

"""
import numpy as np

import dateutil.parser
from matplotlib import cbook, dates
import matplotlib.pyplot as plt
import matplotlib.cbook as cbook
from matplotlib.dates import bytespdate2num
import numpy as np


datafile = cbook.get_sample_data('msft.csv', asfileobj=False)
print('loading', datafile)

dates, closes = np.loadtxt(datafile, delimiter=',',
converters={0: bytespdate2num('%d-%b-%y')},
skiprows=1, usecols=(0, 2), unpack=True)
data = np.genfromtxt(
datafile, delimiter=',', names=True,
converters={0: lambda s: dates.date2num(dateutil.parser.parse(s))})

fig, ax = plt.subplots()
ax.plot_date(dates, closes, '-')
ax.plot_date(data['Date'], data['High'], '-')
fig.autofmt_xdate()
plt.show()
1 change: 1 addition & 0 deletions examples/misc/plotfile_demo.py
Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@

Example use of ``plotfile`` to plot data directly from a file.
"""

import matplotlib.pyplot as plt
import matplotlib.cbook as cbook

Expand Down
21 changes: 9 additions & 12 deletions examples/ticks_and_spines/date_index_formatter2.py
Original file line number Diff line number Diff line change
Expand Up @@ -11,19 +11,18 @@
Formatter to get the appropriate date string for a given index.
"""


import numpy as np

import dateutil.parser
from matplotlib import cbook, dates
import matplotlib.pyplot as plt
import matplotlib.cbook as cbook
from matplotlib.dates import bytespdate2num, num2date
from matplotlib.ticker import Formatter
import numpy as np


datafile = cbook.get_sample_data('msft.csv', asfileobj=False)
print('loading %s' % datafile)
msft_data = np.genfromtxt(datafile, delimiter=',', names=True,
converters={0: bytespdate2num('%d-%b-%y')})[-40:]
msft_data = np.genfromtxt(
datafile, delimiter=',', names=True,
converters={0: lambda s: dates.date2num(dateutil.parser.parse(s))})


class MyFormatter(Formatter):
Expand All @@ -36,13 +35,11 @@ def __call__(self, x, pos=0):
ind = int(np.round(x))
if ind >= len(self.dates) or ind < 0:
return ''
return dates.num2date(self.dates[ind]).strftime(self.fmt)

return num2date(self.dates[ind]).strftime(self.fmt)

formatter = MyFormatter(msft_data['Date'])

fig, ax = plt.subplots()
ax.xaxis.set_major_formatter(formatter)
ax.plot(np.arange(len(msft_data)), msft_data['Close'], 'o-')
ax.xaxis.set_major_formatter(MyFormatter(msft_data['Date']))
ax.plot(msft_data['Close'], 'o-')
fig.autofmt_xdate()
plt.show()