Inner matrix dimensions problem
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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
采纳的回答
Matt Fig
2011-3-25
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));
更多回答（1 个）
Sean de Wolski
2011-3-25
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));
1 个评论
Matt Fig
2011-3-25
+1 Now that's an easy way to avoid this type of problem!
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2011-3-25
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