--- a
+++ b/partyMod/man/Transformations.Rd
@@ -0,0 +1,59 @@
+\name{Transformations}
+\alias{ptrafo}
+\alias{ff_trafo}
+\title{ Function for Data Transformations }
+\description{
+  Transformations of Response or Input Variables
+}
+\usage{
+ptrafo(data, numeric_trafo = id_trafo, factor_trafo = ff_trafo, 
+    ordered_trafo = of_trafo, surv_trafo = logrank_trafo, 
+    var_trafo = NULL)
+ff_trafo(x)
+}
+\arguments{
+  \item{data}{an object of class \code{data.frame}.}
+  \item{numeric_trafo}{a function to by applied to \code{numeric} 
+    elements of \code{data} returning a matrix with \code{nrow(data)}
+    rows and an arbitrary number of columns.}
+  \item{ordered_trafo}{a function to by applied to \code{ordered}
+    elements of \code{data} returning a matrix with \code{nrow(data)}
+    rows and an arbitrary number of columns (usually some scores).}
+  \item{factor_trafo}{a function to by applied to \code{factor}
+    elements of \code{data} returning a matrix with \code{nrow(data)}
+    rows and an arbitrary number of columns (usually a dummy or contrast 
+    matrix).}
+  \item{surv_trafo}{a function to by applied to 
+    elements of class \code{Surv} of \code{data} returning a 
+    matrix with \code{nrow(data)} rows and an arbitrary number of columns.}
+  \item{var_trafo}{an optional named list of functions to be applied to the
+                   corresponding variables in \code{data}.}
+  \item{x}{ a factor}
+}
+\details{
+
+  \code{trafo} applies its arguments to the elements of \code{data}
+  according to the classes of the elements. See \code{\link[coin]{Transformations}}
+  for more documentation and examples.
+
+  In the presence of missing values, one needs to make sure that all
+  user-supplied functions deal with that. 
+
+}
+\value{
+
+  A named matrix with \code{nrow(data)} rows and 
+  arbitrary number of columns.
+
+}
+\examples{
+
+  ### rank a variable
+  ptrafo(data.frame(y = 1:20), 
+         numeric_trafo = function(x) rank(x, na.last = "keep"))
+
+  ### dummy coding of a factor
+  ptrafo(data.frame(y = gl(3, 9)))
+
+}
+\keyword{manip}