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why i'm getting this error?

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ocsse
ocsse 2018-3-25
编辑： ocsse 2018-3-25
why i'm getting this error: Error using * Inner matrix dimensions must agree.
thanks
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David Fletcher
David Fletcher 2018-3-25
编辑：David Fletcher 2018-3-25
Sounds like you're trying to do inner matrix multiplication rather than element by element multiplication
possibly here: (a line number where the error occurred might be handy)
*an*cos*(2*pi*f0*n.'*t) + *bn*sin*(2*pi*f0*n.'*t
instead of
an.*cos(2*pi*f0*n.'*t) + bn.*sin(2*pi*f0*n.'*t
ocsse
ocsse 2018-3-25
still getting an error

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Star Strider
Star Strider 2018-3-25
Your ‘an’ and ‘bn’ are (1x4) vectors, and ‘t’ is (1x500).
One way to avoid it is to transpose ‘an’ and ‘bn’ to column vectors:
s = s + a0 + an'*cos(2*pi*f0*n.'*t) + bn'*sin(2*pi*f0*n.'*t);
I do not know what you want for a final result. If you want a single row vector for each ‘n’, sum them:
s = s + a0 + sum(an'*cos(2*pi*f0*n.'*t) + bn'*sin(2*pi*f0*n.'*t));

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