matplotlib 3.5.1

NotesParametersReturnsBackRef
date2num(d)

Notes

The Gregorian calendar is assumed; this is not universal practice. For details see the module docstring.

Parameters

d : `datetime.datetime` or `numpy.datetime64` or sequences of these

Returns

float or sequence of floats

Number of days since the epoch. See .get_epoch for the epoch, which can be changed by date.epoch or .set_epoch . If the epoch is "1970-01-01T00:00:00" (default) then noon Jan 1 1970 ("1970-01-01T12:00:00") returns 0.5.

Convert datetime objects to Matplotlib dates.

Examples

See :

Back References

The following pages refer to to this document either explicitly or contain code examples using this.

matplotlib.pyplot.plot_date matplotlib.axes._axes.Axes.plot_date matplotlib.dates.AutoDateFormatter.__init__ matplotlib.dates.DateConverter

Local connectivity graph

Hover to see nodes names; edges to Self not shown, Caped at 50 nodes.

Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)

SVG is more flexible but power hungry; and does not scale well to 50 + nodes.

All aboves nodes referred to, (or are referred from) current nodes; Edges from Self to other have been omitted (or all nodes would be connected to the central node "self" which is not useful). Nodes are colored by the library they belong to, and scaled with the number of references pointing them


File: /matplotlib/dates.py#405
type: <class 'function'>
Commit: