[matplotlib]: write dates on x axis

Question

Here an example code in which I would like to draw the entire date on the x axis

import datetime
import matplotlib.pyplot as plt
import random
import numpy as np
from matplotlib.dates import DateFormatter

years = np.arange( 2005, 2016, 1)
years[1] = 2005
years[2] = 2005
months = [ 3, 2, 1, 5, 7, 12, 2, 3, 5, 2, 6]
dates = []
for Y in years:
    dates = dates + [ datetime.datetime(Y, 6 , 4) ]


y = np.random.randn(len(dates))

fig, ax = plt.subplots()

ax.plot_date(dates, y, 'r+', ms = 2, mew = 12)

ax.fmt_xdata = DateFormatter('%y-%m-%d')
fig.autofmt_xdate()

plt.show()

Unfortunately the result is this

And what I need is to write all the date on the x axis like in this picture

What you suggest me to change on my code?

ImportanceOfBeingErnest · Accepted Answer · 2017-04-15 12:13:27Z

1

ax.fmt_xdata is the formatter for the dates usually only used for the hover functionality in interactive plots.

What you want here is to set the major formatter of the xaxis to a DateFormatter:

ax.xaxis.set_major_formatter(DateFormatter('%b-%d-%Y'))

answered Apr 15, 2017 at 12:13

ImportanceOfBeingErnest

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