R: Many are aunder the curve values

Many (and one) area aunder the curve values {Rfast} | R Documentation

## Many are aunder the curve values

### Description

Many are aunder the curve values.

### Usage

    colaucs(group, preds)
    auc(group, preds)

### Arguments

`group` | A numerical vector with two values, one of which must be strictly 1.
`preds` | A numerical matrix with scores, probabilities or any other measure. In the case of auc this is a vector.

### Details

The AUCs are calculated column-wise or just an AUC if the vector function is used.

### Value

A vector with length equal to the number of columns of the "preds" argument. The AUC vlaues for each column. If the "auc" function is used then a signle number is returned.

### Author(s)

Michail Tsagris

R implementation and documentation: Michail Tsagris <mtsagris@yahoo.gr> and Manos Papadakis <papadakm95@gmail.com>.

### See Also

`ttests, ttest, ftests`

### Examples

    ## 200 variables, hence 200 AUCs will be calculated
    x <- matrix( rnorm(100 * 200), ncol = 200 )
    ina <- rbinom(100, 1, 0.6)
    system.time( colaucs(ina, x) )
    a <- colaucs(ina, x)
    b <- auc(ina, x[, 1])
    x <- NULL

[Package Rfast version 2.0.0 Index]