CODEWITHSUNDEEP
pythonmatplotlib
Zargaf
Zargaf

Reputation: 124

how to change plotting time series axes to show time instead of date

I have the script below, I m trying to change my plot to show hours instead of month and year on the bottom.

import datetime
import matplotlib.pyplot as plt

x = [datetime.datetime.now() + datetime.timedelta(hours=i) for i in range(10)]
y = ['54.2', '54.8', '54.2', '54.8', '55.3', '55.3', '55.3', '55.3', '54.8', '54.8']
# plot
plt.plot(x,y)
# beautify the x-labels
plt.gcf().autofmt_xdate()

print(x)
print(y)
plt.show()

Upvotes: 1

Views: 1033

Answers (1)

Narendra Prasath
Narendra Prasath

Reputation: 1531

You can try setting set_major_formatter format:

Approach 1

By changing x axis format directly. But, matplotlib will show only time in hh:00:00 format by default.

import datetime
import matplotlib.pyplot as plt
from matplotlib import dates

x = [datetime.datetime.now() + datetime.timedelta(hours=i) for i in range(10)]

fig, ax = plt.subplots()
y = ['54.2', '54.8', '54.2', '54.8', '55.3', '55.3', '55.3', '55.3', '54.8', '54.8']
# plot
plt.plot(x,y)
# beautify the x-labels
plt.gcf().autofmt_xdate()
## create x-axis hour format
ax.xaxis.set_major_formatter(dates.DateFormatter("%H:%M"))

plt.show()

Approach 2

You can change x axis label value directly using set_xticklabels method. Just add the below code

plt.plot(x,y)
# beautify the x-labels
plt.gcf().autofmt_xdate()
## create x-axis hour format
ax.xaxis.set_major_formatter(dates.DateFormatter("%H:%M"))
x_hours = [date_str.strftime("%H:%M:%S") for date_str in x]
ax.set_xticklabels(x_hours)
plt.show

Upvotes: 1

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