How to calculate integral of a function ?

Hello Friends, I am new for matlab, I want to calculate a integral but I don't know, how should I do it exactly. My matlab code is here:

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clear all;
format long;
T = 0.6;
m = 3.00;
kmin = 1.0;
kmax = 10.0;
fun = @(k) k.^2/exp(sqrt(k.^2 + m.^2)/T) + 1;
q = int (fun,kmin,kmax);

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When I execute the program I got error message:

*??? Undefined function or
method 'int' for input
arguments of type
'function_handle'.

Error in ==> nudenNccbar at 14
q = int (fun,kmin,kmax);*_ *

Please help me to short out the problem. Thank you.

Answer 1

[Michael Haderlein]

The function is quad, quadl, or quadgk:

fun = @(k) k.^2./exp(sqrt(k.^2 + m.^2)/T) + 1;
quad(fun,kmin,kmax)
ans = 9.0267
quadl(fun,kmin,kmax)
ans = 9.0268
quadgk(fun,kmin,kmax)
ans = 9.0268

Please note that a "." was missing in your equation (before the "/").

[Captain Singh]

Thank you Michael.

Answer 2

[Christopher Berry]

The function name that you are looking for is integral not int. Changing this should get your code working. You can see the documentation for usage or examples here:

http://www.mathworks.com/help/matlab/ref/integral.html

[Captain Singh]

Firstly I had used "integral" but it didn't work. The error message was the same as above.