cro: Creates a minimal representation of a data frame.
Description
Given a data frame with a defined response variable, this function creates a
unique representation of the covariates in the data frame, vector (matrix)
of responses, and a pointer vector, connecting the responses with the
corresponding covariates.
Usage
cro(dat, response = 1)
Value
A list with components
y
The response.
covar
A data
frame with unique rows of covariates.
keys
Pointers from y to
covar, connecting each response with its covariate vector.
Arguments
dat
A data frame
response
The column(s) where the response resides.
Author
Göran Broström
Details
The rows in the data frame are converted to text strings with paste
and compared with match.