How do i resolve this error

Error using .*

Matrix dimensions must agree.

Error in phdegmninvert (line 97)

up=-(fftbou.*(exp((z0*100000)*(frequencytotal.*(1/100000)))));

Answer 1

[Max Heimann]

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.

[Olufemi Ologun]

Thank you for the response.

I tried it but still given same error

Answer 2

[Rik]

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)

ans = 1×2

4 3

[Olufemi Ologun]

Thank yuo.

i am using

A= 945, 945

B= 1890, 1890

and R2015

[Olufemi Ologun]

still need advice.

thank you

[Rik]

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]