Description
peaks returns the Cartesian coordinates of peaks function (without drawing it). The returned coordinates can be then plotted using surf.
If n is a scalar, then coordinates are computed over a n x n grid. If n is a vector, then the coordinates are computed over a grid defined by n values (used for X-axis and Y-axis).
When called with two input arguments, peaks computed coordinates over a grid defined by x values (for X-axis) and by y values (for Y-axis).
When called with only one output argument, peaks returns only z-coordinates.
The peaks function is defined as
