CODEWITHSUNDEEP
pythondatematplotlib
zzzbbx
zzzbbx

Reputation: 10131

matplotlib with dates

I'm trying to plot values as a function of the date (only hh:mm:ss, without dd/mm/yy). The code looks like this 

dates = matplotlib.dates.date2num(x_values)
plt.plot_date(dates, y_values)

but I get the following error

'numpy.string_' object has no attribute 'toordinal'.

Upvotes: 6

Views: 9424

Answers (3)

Storm
Storm

Reputation: 373

from matplotlib import pyplot as plt <br>
pay_date=['2016-04-30', '2016-06-28', '2016-11-29'] 
due_date=['2016-05-02', '2016-07-31', '2016-10-29'] 
plt.plot_date(pay_date,due_date,xdate=True,ydate=True)

Just add the parameters xdate=True and ydate=True and it will automatically plot the dates

and finally write the following code, to print the lines

plt.plot(pay_date,due_date)

Upvotes: 0

Mark
Mark

Reputation: 108512

According to the docs:

matplotlib.dates.date2num(d): d is either a datetime instance or a sequence of datetimes.

Looks like you are giving in a string.

Upvotes: 2

Joe Kington
Joe Kington

Reputation: 284552

date2num expects datetime objects. If you have strings, use matplotlib.dates.datestr2num.

Upvotes: 16

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