Basics of MATLAB and Beyond

x =-1 0 1-1 0 1-1 0 1y =1 1 12 2 23 3 3This set of points defines a rectangular domain because the rows of xare identical and the columns of y are identical. We can make a plot ofthe points (as we did on page 25):clfplot(x,y,’.’)Now let us change the y matrix a bit:>> y = [[1; 2; 3] [1; 1.5; 2] [0; .2; .4]]y =1.0000 1.0000 02.0000 1.5000 0.20003.0000 2.0000 0.4000The plot of this data looks like a bent triangle:plot(x,y,’.’)To define a surface over this domain we simply have to supply the zvalues. We can start by simply defining a constant z:c○ 2000 by CRC Press LLC