solveIsotone: Solve for best single-direction (non-decreasing or non-increasing) fit.
Description
Return a vector of length y that is a function of x
(differs at must where x differs) obeying the either the same
order contraints or the opposite order
constraints as x. This vector is picked as close to
y (by square-distance) as possible.
Usage
solveIsotone(varName, x, y, w = NULL)
Arguments
varName
character, name of variable
x
numeric, factor, or character input (not empty, no NAs).
y
numeric (same length as x no NAs), output to match
w
numeric positive, same length as x (weights, can be NULL)