Error using + Matrix dimensions must agree

RGB=real(DFT)+WMI;

[Mostfa Abd El-Aziz]

Error using +

Matrix dimensions must agree.

RGB=real(DFT)+WMI;

[Chunru]

What are the sizes of DFT and WMI? Show the result of running "whos" in matlab.

[Steven Lord]

What do the following commands show immediately before you execute that line of code?

size(DFT)
size(real(DFT))
size(WMI)

[Voss]

My guess would be that the dimensions of matrices DFT and WMI do not agree.

[Steven Lord]

Yes, I agree that likely the dimensions don't agree. Seeing the size of each array may give us some insight into what the cause of that discrepancy may be and suggest a solution. For instance, if both are vectors but one is one element shorter I'd ask if they called diff to create the shorter vector. If one is a vector and the other has the same number of elements but is a different shape, calling reshape may be what the poster wants.

[Mostfa Abd El-Aziz]

how to call reshape?

Answer 1

[yanqi liu]

RGB=real(DFT)+imresize(WMI,[size(DFT,1) size(DFT,2)], 'bilinear');

[Mostfa Abd El-Aziz]

Error using + Matrix dimensions must agree.

The same error still founded

[yanqi liu]

RGB=real(DFT(:,:,1))+imresize(WMI(:,:,1),[size(real(DFT(:,:,1)),1) size(real(DFT(:,:,1)),2)], 'bilinear');

[Mostfa Abd El-Aziz]

It is run good for this code line

but the next code line :

DFT_W=complex(RGB,imag(DFT));

display also an error which : "Error using complex Input arrays must have the same size.""

[yanqi liu]

yes, sir, may be upload mat file to analysis