eha (version 1.0)

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)

Arguments

dat

A data frame

response

The column(s) where the response resides.

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.

Details

The rows in the data frame are converted to text strings with paste and compared with match.

See Also

match, paste

Examples

dat <- data.frame(y = c(1.1, 2.3, 0.7), x1 = c(1, 0, 1), x2 = c(0, 1, 0))
cro(dat)