# Integration of a function

4 次查看（过去 30 天）
Owen McKim2021-12-4

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

### 回答（4 个）

KSSV 2021-12-4
syms x
f = 3*x-x^2 ;
iwant = int(f,x)
iwant = Chunru 2021-12-4
##### 0 个评论显示隐藏 -1更早的评论

John D'Errico 2021-12-4
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 = ##### 0 个评论显示隐藏 -1更早的评论

VBBV 2021-12-4
syms x
f = 3*x-x^2 ;
F = int(f,x);
expand(F)
ans = R2021b

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