quad with parameter

Question

Matus 2012-3-18

Edit Delete quad with parameter Matus asked less than a minute ago

Hi, i try to solve integral with quad and i want to use a parameter. when i put into matlab this code:

quad('cos(t.*314).^2',0,1)

n=2; %parameter

quad('cos(t.*314).^n',0,1,[],[],n)

the solution is not equal. Can you help me please. Thank you.

Answer 1

Walter Roberson 2012-3-18

You cannot pass in parameters the way you are attempting to in the second form. You need to use an anonymous function.

n = 2;
quad(@(t) cos(t*pi).^n, 0, 1)

Please review the quad documentation and notice that there is no possible parameter after "trace", and read the part about Parameterizing Functions.

Matus 2012-3-18

Thank you Walter.