Inner matrix dimensions problem

Hi, I'm trying to execute the following code:

%------------ % Define mesh grid

[x, t] = meshgrid([0:.5:10],[1:.5:10]);

% n is the number of iterations of a Fourier sum

n = 100;

i = 1;

% q is the total of all the summed z's

q = 0;

while i < (n+1)

z = ((2*pi)/(3*i^3))*(1-cos(i*pi))*sin(i.*x)*(exp(-3*(i^2).*t) + 2*cosh(2*(i^2).*t));

q = z + q;

i = i + 1;

end

% plot of q v.s. x and t% surf(x,t,q) mesh(x,t,q) contour(x,t,q)

And I keep getting the error ???=====> mtimes which I'm told is because matrix dimensions don't agree. Can't see where else I need to put '.'. Could anybody help?

Thanks

Answer 1

[Matt Fig]

You were close, only missing one dot.

z = ((2*pi)./(3*i^3))*(1-cos(i*pi))*sin(i.*x).*(exp(-3*(i^2).*t) + 2*cosh(2*(i^2).*t));

Answer 2

[Sean de Wolski]

vectorize('z = ((2*pi)/(3*i^3))*(1-cos(i*pi))*sin(i.*x)*(exp(-3*(i^2).*t) + 2*cosh(2*(i^2).*t));')

ans =

z = ((2.*pi)./(3.*i.^3)).*(1-cos(i.*pi)).*sin(i.*x).*(exp(-3.*(i.^2).*t) + 2.*cosh(2.*(i.^2).*t));

[Matt Fig]

+1 Now that's an easy way to avoid this type of problem!