btrf | R Documentation |
maps real line onto open interval (xl, xu) using the transform y = (exp(xt) * xu + xl)/(1.+exp(xt)) where xt is a numeric vector with -Inf < xt < Inf
btrf(xt, xl, xu)
xt |
a numeric vector |
xl |
a numeric vector of same length as x |
xu |
a numeric vector of same length as x, and xu > xl |
returns the inverse-logit transform (numeric) of xt
E. Georg Luebeck (FHCRC)
ftrf
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