Computes the logit transformation logit \(=\log [p/(1-p)]\)
for the proportion \(p\).
If \(p=0\) or \(1\), then the logit
is undefined. logit
can remap the proportions to the interval
(adjust, 1 - adjust)
prior to the transformation. If it adjusts the data
automatically, logit
will print a warning message.