How do i resolve this error
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Error using .*
Matrix dimensions must agree.
Error in phdegmninvert (line 97)
up=-(fftbou.*(exp((z0*100000)*(frequencytotal.*(1/100000)))));
回答（2 个）
Max Heimann
2022-1-17
编辑：Max Heimann
2022-1-17
Try turning the multiplication in the middle into an elementwise multiplication aswell.
Also, the last multiplication probably shouldnt be elementwise since you are multiplying with a scalar value
up=-(fftbou.*(exp((z0*100000) .* (frequencytotal*(1/100000)))));
If that does not work, we would need more information about the dimensions of the multiplied elements.
You can resolve this error by making sure the dimensions agree.
If you think this answer is unhelpful; it is. If you want a more helpful answer you will have to provide more details.
An element-wise multiplication will work if isequal(size(A),size(B)). If non-matching dimensions are of length 1 and you are using R2016b or later, implicit expansion will cause expansion into an array:
A=rand(1,3);
B=rand(4,1);
size(A.*B)
3 个评论
Olufemi Ologun
2022-1-17
Olufemi Ologun
2022-1-17
Rik
2022-1-17
Is that the size, or the content? If it is the latter there should be no issue (except maybe what Max already wrote about the * instead of .*). If the former, how do you expect Matlab to multiply them? What should be the result of this?
[1 2;3 4].*[1 2 3;4 5 6;7 8 9]
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