Most examples work across multiple plotting backends, this example is also available for:
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import numpy as np
import holoviews as hv
hv.extension('bokeh')
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n = 20
coords = np.linspace(-1.5, 1.5, n)
X,Y = np.meshgrid(coords, coords);
Qx = np.cos(Y) - np.cos(X)
Qz = np.sin(Y) + np.sin(X)
Z = np.sqrt(X**2 + Y**2)
qmesh = hv.QuadMesh((Qx, Qz, Z))
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qmesh