melt_check: Check that input variables to melt are appropriate.
Description
If id.vars or measure.vars are missing, melt_check
will do its
best to impute them. If you only supply one of id.vars and measure.vars,
melt will assume the remainder of the variables in the data set belong to
the other. If you supply neither, melt will assume discrete variables are
id variables and all other are measured.
Usage
melt_check(data, id.vars, measure.vars, variable.name, value.name)
Arguments
id.vars
vector of identifying variable names or indexes
measure.vars
vector of Measured variable names or indexes
variable.name
name of variable used to store measured variable names
value.name
name of variable used to store values
Value
a list giving id and measure variables names.