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#' Internal: Function to transform multinomial predictions
#'
#' This function exists solely to transform predictions of the multinomial dist.
#' Transforms odds into probabilities to get into each class.
#' @keywords internal
mult_trans <- function(predictions, model) {
levels <- levels(model$model.frame[, 1])
psums <- rowSums(predictions) + 1
p0 <- 1 / psums
trans_preds <- cbind(p0, matrix(apply(predictions, 2, FUN = function(x)
return(x * p0)), ncol = length(levels) - 1)) # matrix because else it will not work with just one row
trans_preds <- as.data.frame(trans_preds)
colnames(trans_preds) <- levels
return(trans_preds)
}
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