using a matrix in a calculation

Question

0 个投票

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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显示 -2更早的评论隐藏 -2更早的评论

Answer 1

Akira Agata 2023-5-1

1 个投票

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));

joseph 2023-5-1

This worked, thank you so much

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

Answer 2

Matt J 2023-5-1

0 个投票

Use element-wise operators .*, ./, and .^