matplotlib.pyplot.stackplot#

matplotlib.pyplot.stackplot(x,*args,labels=(),colors=None,baseline='zero',data=None,**kwargs)[source]#

Draw a stacked area plot.

Parameters:

x(N,) array-like

y(M, N) array-like

The data is assumed to be unstacked. Each of the followingcalls is legal:

stackplot(x,y)# where y has shape (M, N)stackplot(x,y1,y2,y3)# where y1, y2, y3, y4 have length N

baseline{'zero', 'sym', 'wiggle', 'weighted_wiggle'}

Method used to calculate the baseline:

• 'zero': Constant zero baseline, i.e. a simple stacked plot.

• 'sym': Symmetric around zero and is sometimes called'ThemeRiver'.

• 'wiggle': Minimizes the sum of the squared slopes.

• 'weighted_wiggle': Does the same but weights to account forsize of each layer. It is also called 'Streamgraph'-layout. Moredetails can be found athttp://leebyron.com/streamgraph/.

labelslist of str, optional

A sequence of labels to assign to each data series. If unspecified,then no labels will be applied to artists.

colorslist of color, optional

A sequence of colors to be cycled through and used to color the stackedareas. The sequence need not be exactly the same length as the numberof providedy, in which case the colors will repeat from thebeginning.

If not specified, the colors from the Axes property cycle will be used.

dataindexable object, optional

If given, all parameters also accept a strings, which isinterpreted asdata[s] (unless this raises an exception).

**kwargs

All other keyword arguments are passed toAxes.fill_between.

Returns:

list ofPolyCollection

A list ofPolyCollection instances, one for each element in thestacked area plot.