Matplotlib: deleting an existing data series

Date:2006-11-09 (last modified), 2006-11-09 (created)

Each axes instance contains a lines attribute, which is a list of the data series in the plot, added in chronological order. To delete a particular data series, one must simply delete the appropriate element of the lines list and redraw if necessary.

The is illustrated in the following example from an interactive session:

In [ ]:
>>> x = N.arange(10)

>>> fig = P.figure()
>>> ax = fig.add_subplot(111)
>>> ax.plot(x)
[<matplotlib.lines.Line2D instance at 0x427ce7ec>]

>>> ax.plot(x+10)
[<matplotlib.lines.Line2D instance at 0x427ce88c>]

>>> ax.plot(x+20)
[<matplotlib.lines.Line2D instance at 0x427ce9ac>]

>>> ax.lines
[<matplotlib.lines.Line2D instance at 0x427ce7ec>,
 <matplotlib.lines.Line2D instance at 0x427ce88c>,
 <matplotlib.lines.Line2D instance at 0x427ce9ac>]

>>> del ax.lines[1]

which will plot three lines, and then delete the second.

Section author: AngusMcMorland