Grid plot

Plots the gridded data as a surface.

The gridplot function displays a regularly gridded data as a patch surface. The input grid data is a m-by-3 matrix as (x, y, z) triplets. The z value is assigned as a color value to the corresponding patch. A random value is assigned to z when the grid data is a m-by-2 matrix.
Using this function, there is no need to interpolate the gridded data, that might be already the result of an interpolation method. While other methods make gridline-registered grids that can be plotted using e.g. Mtlab surf function, this function makes a pixel registered grid and uses the Matlab patch function to display the grid.