Defining coordinates and points in a 3D plot

How do I define the length of x (0 to 1m) and y (0 to .5m) with a grid of 101 by 51 points? This is a 3D plot

[Walter Roberson]

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Answer 1

[Walter Roberson]

xv = linspace(0, 1, 101);
yv = linspace(0, 0.5, 51);
[X, Y] = ndgrid(xv, yv);

Z = sqrt(sin(X)) .* cos(Y-X).^2;
surf(X, Y, Z, 'edgecolor', 'none');