Please help me convert them into a function of theta

Error using ^ (line 51)

Incorrect dimensions for raising a matrix to a power.

Check that the matrix is square and the power is a

scalar. To perform elementwise matrix powers, use '.^'.

I got this when I try to use the equation

Please help me convert them into a function of theta that i can plot as a (theta,x) to test from degree 0 to 360(0 to 2pi).

[KSSV]

The error is clear....if you have a matrix, A if you want to find the power each element of A, use element by element power

A2 = A.^2

You attach the code, you tried..so you can get help.

[carson yeoh]

abc = (r*(wab^2)*(L^2-r^2).*sin(theta))./((L*L-r*r.*sin(theta).*sin(theta))^(3/2));

Answer 1

[Bjorn Gustavsson]

When you get such an error, your first action would be to look at the sizes of the variables you use:

whos r wab L r theta

Next you'll have think about whether you want matrix-power or elementwise power (same with products - matrix-product or element-wise product). From your equation it seems as if you want elementwise operations, but we cannot know this with absolute certainty. In that case you'll have to modify your expression to something like this:

abc = (r.*(wab.^2)*(L.^2-r.^2).*sin(theta))./((L.*L-r.*r.*sin(theta).*sin(theta)).^(3/2));

HTH