Matrix dimensions must agree in a function with the sum

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Yuriy Yerin 2022-1-18

评论： Torsten 2022-1-18

Hello everybody.

Sorry for a stupid question but can't resolve this problem.

How can I avoid the error "Matrix dimensions must agree" without implementation of two loops for two variables?

The code is below.

function z=coeff

n=0:1:100000;

t=linspace(0.5,1.25,100);

G=linspace(0.1,1,100);

[t G] = meshgrid(t,G);

b11= @(t, G) (pi*t.*(sum((((2*n+1).*pi.*t)+G).^4./(((2*n+1).*pi.*t).^3.*(((2*n+1).*pi.*t)+2*G).^4)))+...

pi*t*(sum((((2*n+1).*pi.*t)+G).*G.*(G.^2+3*G.*((2*n+1).*pi.*t)+((2*n+1).*pi.*t).^2)./(((2*n+1).*pi.*t).^3.*(((2*n+1).*pi.*t)+2*G).^4))));

z1=b11(t,G);

contourf(t,G,z1);

colormap jet

colorbar

set(gca,'FontName','Times New Roman','FontSize',34)

end

Many thanks in advance.

Torsten 2022-1-18

Insert the lines

size(t)
size(G)
size(n)

after the call to meshgrid.

These sizes must be equal in order for the function b11 to work. In your case, they are different.

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