Error function ERF

1.erf Error function introduction
erf It's the error function , It is the integral of Gaussian probability density function .

nature ：

2.erf Error function in matlab To realize
erf Function in matlab It can be directly used as a built-in function .erf(0) Equivalent to the following formula ：

syms s f
f=exp(-s^2);
err=double(2/sqrt(pi)*int(f,0,0))

3.erf Error function in python To realize
grammar ：math.erf(var)
Use ：

import math

var = 0
print(math.erf(var))