R/Cllr.R

In davidavdav/ROC: Compute structures to compute ROC and DET plots and metrics for 2-class classifiers.

`Cllr` <-
function(x, opt=F) {
  if (opt) {                            # do we want optimum?
    if (is.null(x$opt.llr)) x <- opt.llr(x, F) # did we have optimum?
    x$score <- x$opt.llr
  }
  if (is.null(x$weight)) x$weight <- 1  # did we have weights?
  c.miss <- 1/log(2) * mean(log(1+exp(-x$score[x$target]))*x$weight[x$target])
  c.fa <- 1/log(2) * mean(log(1+exp(x$score[!x$target]))*x$weight[!x$target])
  (c.miss+c.fa)/2
}