MATLAB - int

Documentation

---

Symbolic Integration

~Example:

syms x
expr = -2*x/(1+x^2)^2;
 
% Find the indefinite integral of the univariate expression.
 
F = int(expr)
>> F = 
	1/(x^2 + 1)
 

% Find the finite integral of the univariate expression.
 
syms x
expr = x*log(1+x);
F = int(expr,[0 1])
 
>> F = 
	1/4

syms x
f = cos(x)/sqrt(1 + x^2);
Fint = int(f,x,[0 10])

Fvpa = vpa(Fint)
>> Fvpa = 
	0.37570628299079723478493405557162

---

To approximate integrals directly, use vpaintegral instead of vpa. The vpaintegral function is faster and provides control over integration tolerances.

Fvpaint = vpaintegral(f,x,[0 10])
>> Fvpaint =
	0.375706