4.19 asin - Inverse Sine

Format: asin( $num$ )

Compute arcsine (inverse sine). The function evaluates the principal value ranges from $-1.0\sim 1.0$ , and returns values within the parameter of $-\pi /2\sim \pi /2$ .

Example

Example 1: Basic Example

$ more dat1.csv
id,val
1,-1.0
2,0
3,1.0
4,
5,2
$ mcal c='asin(${val})' a=rsl i=dat1.csv o=rsl1.csv
#END# kgcal a=rsl c=asin(${val}) i=dat1.csv o=rsl1.csv
$ more rsl1.csv
id,val,rsl
1,-1.0,-1.570796327
2,0,0
3,1.0,1.570796327
4,,
5,2,