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+\name{mkin_wide_to_long}
+\alias{mkin_wide_to_long}
+\title{
+  Convert a dataframe with observations over time into long format.
+}
+\usage{
+mkin_wide_to_long(wide_data, time = "t")
+}
+\description{
+  This function simply takes a dataframe with one independent variable and several 
+  dependent variable and converts it into the long form as required by \code{\link{modCost}}.
+}
+\arguments{
+  \item{wide_data}{
+  The dataframe must contain one variable with the time values specified by the 
+  \code{time} argument and usually more than one column of observed values.
+}
+  \item{time}{
+  The name of the time variable.
+}
+}
+\value{
+  Dataframe in long format as needed for \code{\link{modCost}}.
+}
+\author{
+  Johannes Ranke
+}
+\examples{
+wide <- data.frame(t = c(1,2,3), x = c(1,4,7), y = c(3,4,5))
+mkin_wide_to_long(wide)
+}
+\keyword{ manip }