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matplotlib.pyplot.stackplot

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

Draw a stacked area plot.

Parameters:

Parameters:	`x : 1d array of dimension N` `y : 2d array (dimension MxN), or sequence of 1d arrays (each dimension 1xN)` The data is assumed to be unstacked. Each of the following calls is legal: stackplot(x, y) # where y is MxN stackplot(x, y1, y2, y3, y4) # where y1, y2, y3, y4, are all 1xNm `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 for size of each layer. It is also called 'Streamgraph'-layout. More details can be found at http://leebyron.com/streamgraph/. `labels : Length N sequence of strings` Labels to assign to each data series. `colors : Length N sequence of colors` A list or tuple of colors. These will be cycled through and used to colour the stacked areas. **kwargs All other keyword arguments are passed to `Axes.fill_between()`.
Returns:	`list : list of PolyCollection` A list of `PolyCollection` instances, one for each element in the stacked area plot.

x : 1d array of dimension N

y : 2d array (dimension MxN), or sequence of 1d arrays (each dimension 1xN)

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

stackplot(x, y)               # where y is MxN
stackplot(x, y1, y2, y3, y4)  # where y1, y2, y3, y4, are all 1xNm

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 for size of each layer. It is also called 'Streamgraph'-layout. More details can be found at http://leebyron.com/streamgraph/.

labels : Length N sequence of strings

Labels to assign to each data series.

colors : Length N sequence of colors

A list or tuple of colors. These will be cycled through and used to colour the stacked areas.

**kwargs

All other keyword arguments are passed to Axes.fill_between().

Returns:

list : list of PolyCollection: A list of PolyCollection instances, one for each element in the stacked area plot.

Notes

Note

In addition to the above described arguments, this function can take a data keyword argument. If such a data argument is given, the following arguments are replaced by data[<arg>]:

All positional and all keyword arguments.

Objects passed as data must support item access (data[<arg>]) and membership test (<arg> in data).