Manuals/calci/ERF

ERF(ll,ul)

• $ll$ is the lower limit and $ul$ is the upper limit.

Description

• This function gives the value of the error function .
• Error function is the special function which is encountered in integrating the normal distribution.
• In $ERF(ll,ul),ll$ is the lower limit of the integrating function and $ul$ is the upper limit of the integrating function.
• Also $ul$ is optional. When we are omitting the $ul$ value, then the integral of the error function between 0 and the given $ll$ value is returned otherwise it will consider the given $ll$ and $ul$ values.
• This function is also called Gauss error function.
• $ERF$is defined by:$ERF(z)={\frac {2}{\sqrt {\pi }}}\int \limits _{0}^{z}e^{-t^{2}}dt$

$ERF(a,b)={\frac {2}{\sqrt {\pi }}}\int \limits _{a}^{b}e^{-t^{2}}dt=ERF(b)-ERF(a)$.

• In this case 'a' is the lower limit and 'b' is the upper limit.
• This function will return the result as error when

1. any one of the argument is nonnumeric.
2. ll or ul is negative.

Examples

1. ERF(1,2)=0.15262153
2. ERF(3,2)=-0.004655645
3. ERF(0,1)=0.842700735
4. ERF(5)=1
5. ERF(-3)=NAN

See Also

• ERFC