I have a 3D data in which the x and y are piece-wise constant and z is constant in the interval of x and y. I would like to plot them with Matlab contourf function. The problem is that for an interval x,y the value z is interpolated. For example for x between x1 and x2 and y between y1 and y2, the value of z is k. Currently contourf in Matlab plots the interpolation of z around the region of x1,x2 and y1,y2. How can I keep the values of z is set constant in region between x1 and x2 and y1 and y2?
Thank you in advance.