How can I use loop for summation of cosines?
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Hi: I was trying to take the following sum, y = sum over f's (harmonics) of cos(2*pi*f*t) using this loop: t = -1:.001:1; f = 1:10 for y = sum (cos(2*pi*f*t), f) end plot (t,y) But it's leading to errors! Can anyone please advise? Thanks. Arijit
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Purushottama Rao
on 12 Aug 2015
loop variable for loop is not defined. Futher more in your eqn, f is an array of size 10, and t is an array of size 2001. How do you want to iterate y?
Answers (1)
Walter Roberson
on 12 Aug 2015
sum() of something that is numeric in its first argument must either have no second argument or the second argument must be the dimension number.
symsum() of a symbolic expression expression allows a variable and a range of values
But what you need is bsxfun() to calculate the table of values and then to sum() along the appropriate dimension
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