av_matrix {mixl}

Extract the availabilites matrix from the dataset, using column indicies

Description

Extract the availabilites matrix from the dataset, using column indicies

Usage

av_matrix(data, av_cols)

Arguments

data

The dataset used in the model

av_cols

A vector of the the column indicies of the availabilities for each alternative

Value

Matrix of availabilities for alternatives and the number of choice observations

Examples

data("Train", package="mlogit")
Train$ID <- Train$id
Train$CHOICE <- as.numeric(Train$choice)
Train$avail_A <- sample(2, replace=TRUE, size=nrow(Train))-1
Train$avail_B <- sample(2, replace=TRUE, size=nrow(Train))-1
av_matrix(Train, c('avail_A', 'avail_B'))