period_arcTrig.Rdget arc-trigonometric values in periods
period_arcTrig( x, y = NULL, arc.fun = c("acos", "asin", "atan", "atan2"), return.range = NULL )
| x | trigonometric values |
|---|---|
| y | used for atan2 function. see |
| arc.fun | arc-trigonometric function |
| return.range | set NULL for a range of 0 to 2*pi. |
angles in radian