Fitting multiple planes- multiple regression

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Hi, I am trying to write a program to fit few planes to 3D data using multiple linear regression. Each plane would be best-fitted to a set of 3D data-points saved in single 2D array (x,y)=z, where x,y are X,Y coordinates in 2D Coordinate system and z is the height value in space. I would have a few of 2D arrays containing points, therefore few planes would have to be fitted in. The function computing regression would have to accept as input the list of 2D arrays: function [out1, out2, ...] = myfunction_multtiple_planar_fit(Input1_2D_array_1, Input2_2D_array_2, Input3_2D_array_3, ...) and also - Fit a plane to each array - Plot all data points and fitted planes on the same 3D-plot - Return plane equation for each fitted plane - Return centroid of each fitted plane (x,y coordinates and z [height] value)

I would more than grateful for your help!

Best wishes and many thanks, Robert