Can someone explain what's wrong with my formula?
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Commented: Kevin on 30 Sep 2021
omega = 2:2:6
I = 10
C = 0.05
V = (-I./omega.*C)*cos(omega.*t)
What is wrong with it? I get an error when I try to run it.
Matt J on 30 Sep 2021
Edited: Matt J on 30 Sep 2021
Be careful of missing dots...
V = (-I./omega.*C).*cos(omega.*t)
More Answers (1)
Walter Roberson on 30 Sep 2021
omega is a vector, so (-I./omega.*C) is a vector and cos(omega.*t) is a vector the same size.
So you have 1 x 3 row vector * 1 x 3 row vector. But the * operator is algebraic matrix multiplication, "inner product". In the expresson A*B then size(A,2) must equal size(B,1) -- the "inner" dimensions must match. The first 1 x 3 vector operand for the * operation has 3 columns. The second 1 x 3 vector operand for the * operation has 1 row. But 1 is not equal to 3, so the * operation fails.
The element-by-element multiplication operator is .* instead of *
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