Kindly help me integrate this function.

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I am trying to integrate the following expression using 'quad' fuction but MATLAB is giving errors, kindly help me with the code. Code starts below:
f= @(x) ((sin(x))^2)/(((sin(x))^2)+(7));
% a, the lower limit
a= 0 ;
% b, the upper limit
b= pi/2 ;
answer=quad(f,a,b);
%%% Code ends
MATLAB gives following error:
??? Error using ==> mpower Inputs must be a scalar and a square matrix.
Error in ==> @(theta)((sin(theta))^2)/(((sin(theta))^2)+(7))
Error in ==> quad at 77 y = f(x, varargin{:});
Kindly help.

Accepted Answer

Star Strider
Star Strider on 11 May 2014
You need to vectorize your code.
This works:
f= @(x) ((sin(x)).^2)./(((sin(x)).^2)+(7));
a= 0 ;
b= pi/2 ;
answer=quad(f,a,b);
produces:
answer =
101.4509e-003
  4 Comments
Furqan Haider
Furqan Haider on 11 May 2014
Thank u again, I got what was required.
Best regards.

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