Given a dataframe containing one or more variables named with a common
prefix, this function creates a stacked dataset with one set of
observed values of the variables (in order of occurence) per line.
Usage
mystack(object, fu.vars, create.idvar = FALSE)
Arguments
object
a dataframe containing one or more variables named with a common
prefix
fu.vars
a list of the unique prefixes
create.idvar
Do you want to add an ID variable with a common
value given to all records resulting from a given input record?
Default is FALSE