Hi all I'm trying to plot the data to see the global minimum point. I'm presented with the equation

C = (1.10471.*((Z).^2)*((X).^2))+(0.0481*(Y*Z)*14*X);

my first issue is that when I try to produce a plot of this I get the error

??? Error using ==> mtimes Inputs must be 2-D, or at least one input must be scalar.

Error in ==> Untitled4 at 5 C = (1.10471.*((Z).^2)*((X).^2))+(0.0481*(Y*Z)*14*X);

My code is x = -10:1:10; y = -10:1:10; z = -10:1:10; [X,Y,Z] = meshgrid(x,y,z); C = (1.10471.*((Z).^2)*((X).^2))+(0.0481*(Y*Z)*14*X); surf(X,Y,Z,C); hold on; axis([-10 10 -10 10 10 10]);

Many thanks

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