How to calculate integral of a function ?

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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:
_________________________________________________________________________________________________
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);
_________________________________________________________________________________________________
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.

采纳的回答

Michael Haderlein
编辑:Michael Haderlein 2014-8-6
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 "/").

更多回答(1 个)

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:
  1 个评论
Captain Singh
Captain Singh 2014-8-6
Firstly I had used "integral" but it didn't work. The error message was the same as above.

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