Axes.stackplot(x, *args, data=None, **kwargs)[source]
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(). list : list of PolyCollection A list of PolyCollection instances, one for each element in the stacked area plot.