using a matrix in a calculation

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joseph
joseph 2023-5-1
评论： Akira Agata 2023-5-1
i am trying to compute the equation:
vr = (v0*r)/(sqrt(r^2+(w*l-1/(w*c))^2));
where everything in the equation is a scalar and w is a matrix. However when I run this code I get an error that states:
Error using /
Matrix dimensions must agree.
I dont understand how the dimensions wouldn't agree in this situation.

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回答（2 个）

Akira Agata
Akira Agata 2023-5-1
To do an element-wise calculation of an equation to a matrix, you should add dot (.) just before operator, like:
vr = (v0*r)./(sqrt(r^2+(w*l-1./(w*c))^2));
  2 个评论
joseph
joseph 2023-5-1
This worked, thank you so much
Akira Agata
Akira Agata 2023-5-1
Let me correct one typo:
vr = (v0*r)./(sqrt(r^2+(w*l-1./(w*c)).^2)); % need dot (.) before ^ operator, too

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Matt J
Matt J 2023-5-1
Use element-wise operators .*, ./, and .^

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