# Compute AUC

### Description

The function computes AUC.

### Usage

1 |

### Arguments

`x` |
numeric vector. |

`y` |
numeric vector. If missing, |

`group` |
grouping vector or factor. |

`switchAUC` |
logical value. Switch AUC; see Details section. |

### Details

The function computes the area under the receiver operating characteristic curve (AUC under ROC curve).

If `AUC < 0.5`

, a warning is printed and `1-AUC`

is returned. This
behaviour can be suppressed by using `switchAUC = FALSE`

The implementation uses the connection of AUC to the Wilcoxon rank sum test; see Hanley and McNeil (1982).

### Value

AUC value.

### Author(s)

Matthias Kohl Matthias.Kohl@stamats.de

### References

J. A. Hanley and B. J. McNeil (1982). The meaning and use of the area under a receiver
operating characteristic (ROC) curve. *Radiology*, **143**, 29-36.

### Examples

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