Dot indexing is not supported for variables of this type.

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Tosin
Tosin 2023-5-11
回答： Image Analyst 2023-5-11
Dot indexing is not supported for variables of this type.
Error in final (line 20)
O=fft2(o,N256,N256); PHI_o=O. conj(O);

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回答（2 个）

Chunru
Chunru 2023-5-11
% avoid use variable such as o and O
x = rand(256, 236);
y = fft2(x,256,256);
% assume that you are computing the power
p = y.* conj(y);
% alternatively
% p = abs(y).^2;
Image Analyst
Image Analyst 2023-5-11
You have
PHI_o=O. conj(O);
So, because there is a dot after O you're telling MATLAB that the (poorly named) "O" is a structure or class. It may be -- we have no idea because you didn't tell us how you instantiated O. But you can't have a space after the dot, and that is what you have so it threw the error. Perhaps you meant to have no space
PHI_o = O.conj(O);

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