How to calculate integral of a function ?
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Captain Singh
il 5 Ago 2014
Commentato: Captain Singh
il 6 Ago 2014
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.
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Risposta accettata
Michael Haderlein
il 6 Ago 2014
Modificato: Michael Haderlein
il 6 Ago 2014
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 "/").
Più risposte (1)
Christopher Berry
il 5 Ago 2014
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:
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