zero_plus: Make all values strictly higher than zero
Description
This is an auxiliary function that makes all values in numeric vector x strictly
positive by replacing all values equal to or lower than zero with
the values in small.pos. small_pos stands for 'small positive constant'.
Usage
zero_plus(x, small_pos = 1e-05)
Value
A copy of x in which all values equal to or lower than zero are
replaced by small_pos.
Arguments
x
A numeric vector.
small_pos
A (small) positive number to replace negative values and 0s.