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##### 15.2.2.8 Surface Properties

`xdata`
`ydata`
`zdata`
  The data determining the surface. The `xdata` and `ydata` elements are vectors and `zdata` must be a matrix.
`keylabel`
  The text of the legend entry corresponding to this surface. Note that this property is not compatible with Matlab and may be removed in a future version of Octave.