Error using symengine. Dimensions do not match.

Question

Juliana Vélez Mesa 2020-12-14

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/693800-error-using-symengine-dimensions-do-not-match

回答： Raunak Gupta 2020-12-18

Good afternoon. I'm trying to run this code, but I get this error: Error using symengine. Dimensions do not match. If anyone could help me to solve it I would be so glad.

x=0:1/p:L;

y=0:1/m:L1;

function fn(atr,~)

for i=1:length(y)

M(1,1+(i-1)*length(x):i*length(x))=x;

M(2,1+(i-1)*length(x):i*length(x))=y(i)*ones(1,length(x));

end

for n=1:50

u1=str2sym(get(atr,'string'))

inte=u1*sin(n*pi*x/L)

q = int(inte,0,L)

Dn= 2*q/(L*sinh(n*pi*L1/L))

s=Dn*sinh(n*pi*y/L)*sin(n*pi*x/L)

end

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Answer 1

Raunak Gupta 2020-12-18

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Hi,

Since there are lot of variables which are not initialized, I am assuming length of vector x and y are different. From the error message I can understand that code works fine till the last line, where

s=Dn*sinh(n*pi*y/L)*sin(n*pi*x/L);

throughs the error because of different size of sinh(n*pi*y/L) and sin(n*pi*x/L). You can make both x and y of same length, this will clear out the error.