Integration of a function

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Owen McKim
Owen McKim 2021-12-4
回答： VBBV 2021-12-4
Using the MATLAB intergral function you can integrate a function between a min and max value. integral(fun,min,max)
But I was wondering how you can show the intergated equation in MATLAB?
For example, If i intergrate I would get . How can a display that in MATLAB.
Thanks

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回答（4 个）

KSSV
KSSV 2021-12-4
Ran in:
syms x
f = 3*x-x^2 ;
iwant = int(f,x)
iwant = 
Chunru
Chunru 2021-12-4
John D'Errico
John D'Errico 2021-12-4
Ran in:
Integral is a NUMERICAL tool for integration, uing adaptive numerical methods. It will return a NUMERICAL result, and only applies to definite integrals. Nothing more.
You need to use symbolic tools to perform an integration. That means you need to use syms.
syms x % creates x as a symbolic variable
int(x^2 + 2) % use int, NOT integral
ans = 
VBBV
VBBV 2021-12-4
Ran in:
syms x
f = 3*x-x^2 ;
F = int(f,x);
expand(F)
ans = 

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