multiplication between vectors

Question

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Hi everybody,

I have a problem with my program in matlab. I get an error about a multipication between vectors. I print the size of each vetor:

===========S(1:win_size, i)========= 256 1

==========x(offset(i):offset(i)+win_size-1)======== 1 256

========window======== 256

========x(offset(i):offset(i)+win_size-1) .* window====== ??? Error using ==> times Matrix dimensions must agree.

Error in ==> myspecgram at 107 S(1:win_size, i) = x(offset(i):offset(i)+win_size-1) .* window;

How can I fix this error?

Thanks, Ashraf

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per isakson 2012-6-10

Please markup!

Answer 1

per isakson 2012-6-10

0 个投票

".* " is element wise multiplication. Is that what you want? If so the vectors must have identical sizes or one must be a scalar.

Answer 2

Walter Roberson 2012-6-11

0 个投票

If x is a row vector and window is a column vector then you cannot use .* to multiply the two together.

Consider making x a column vector to be the same as your other variables.