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recode_data_main <-
function (data, dimens, alpha) {
recoded_data <- array (0, c(dim(data)[1], dim(data)[2]))
for (j in 1:(dim(data)[2]-1)) {
v <- as.factor(data[,j])
if (length(levels(v)) > dimens[j]) {
stop(paste("The dimens vector does not agree with the data. For example, dimens[",j,"] must be increased to at least ", length(levels(v)), ".", sep = ""))
}
recoded_data[,j] <- as.double(v) - 1
}
v <- as.factor(data[,dim(data)[2]])
if (length(levels(v)) != 2)
stop ("Response must be binary")
recoded_data[,dim(data)[2]] <- as.double(v) - 1
recoded_data <- as.data.frame(recoded_data)
colnames(recoded_data) <- colnames(data)
recoded_dimens <- dimens
response <- recoded_data[,dim(data)[2]]
for (i in 1:(dim(data)[2]-1)) {
if (dimens[i] == 3) {
candidates <- array (0, c(dim(data)[1],4))
candidates[,1] <- data[,i]
candidates[,2] <- ifelse (recoded_data[,i] == 0, 0, 1)
candidates[,3] <- ifelse (recoded_data[,i] == 1, 0, 1)
candidates[,4] <- ifelse (recoded_data[,i] == 2, 0, 1)
temp <- optimal_coding (as.data.frame(cbind(candidates, response)), dimens = c(3,2,2,2,2), alpha = alpha)
recoded_data[,i] <- temp[[1]]
recoded_dimens[i] <- temp[[2]]
}
}
return(list(recoded_data = recoded_data, recoded_dimens = recoded_dimens))
}
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