Integration a multivariable function wrt to just 1

Hi guys,

I'm trying to integrate a function that consists of 3 variables, i,j, and y, wrt to y.

This is what I have came up with. It doesn't work in the sense that after the integration, if I try to input values for i and j, there is an error.

fun_wing = @(y,i,j) rho.*A.*((((y./l).^(i+1)).*(2+i-i.*(y./l)))./(i.*(i+1).*(i+2))).*((((y./l).^(j+1)).*(2+j-j.*(y./l)))./(j.*(j+1).*(j+2)));

M_wing = @(i,j) integral(@(y) fun_wing(y,i,j),0,1);

rho is a value that I have defined, and A is a function in terms of y, as follows.

A = @(y) 0.05.*(4-2.*y./l+((y.*y)./(l.*l)));

Please advice!

Thanks in advance.

Cheers, Jason

Answer 1

[Walter Roberson]

You define A as an anonymous function, but in fun_wing you attempt to multiply the handle of the function by something. You need to invoke the function, A(y) instead of just the name A

[Jason Ong]

Thank you so much! I'm still new at this guess that's why I got the fundamentals wrong. You're the man!