import numpy as np
import holoviews as hv
hv.extension('matplotlib')

xs = np.linspace(0, np.pi*4, 40)
hv.Area((xs, np.sin(xs)))

X  = np.linspace(0,3,200)
Y = X**2 + 3
Y2 = np.exp(X) + 2
Y3 = np.cos(X)
hv.Area((X, Y, Y2), vdims=['y', 'y2']) * hv.Area((X, Y, Y3), vdims=['y', 'y3'])

values = np.random.rand(5, 20)
percentages = (values/values.sum(axis=0)).T*100

overlay = hv.Overlay([hv.Area(percentages[:, i], vdims=[hv.Dimension('value', unit='%')]) for i in range(5)])
overlay + hv.Area.stack(overlay)