DfExtractCorCbmDataset: Extract two arms of a pairing from an MRMC ROC dataset

In RJafroc: Artificial Intelligence Systems and Observer Performance

Extract two arms of a pairing from an MRMC ROC dataset

Description

Extract a paired dataset from a larger dataset. The pairing could be two readers in the same treatment, or different readers in different treatments, or the same reader in different treatments. If necessary The data is binned to 5 bins in each condition.

Usage

DfExtractCorCbmDataset(dataset, trts = 1, rdrs = 1)

Arguments

dataset	The original dataset from which the pairing is to be extracted
trts	A vector, maximum length 2, contains the indices of the treatment or treatments to be extracted
rdrs	A vector, maximum length 2, contains the indices of the reader or readers to be extracted

Details

The desired pairing is contained in the vectors trts and rdrs. If either has length one, the other must have length two and the pairing is implicit. If both are length two, then the pairing is that implied by the first treatement and the second reader, which is one arm, and the other arm is that implied by the second treatment paired with the first reader. Using this method any allowed pairing can be extracted and analyzed by FitCorCbm. The utility of this software is in designing a ratings simulator that is statistically matched to a real dataset.

Value

A new dataset in which the number of treatments is one and the number of readers is two

Examples

## Extract the paired data corresponding to the second and third readers in the first treatment
## from the included ROC dataset
dataset11_23 <- DfExtractCorCbmDataset(dataset05, trts = 1, rdrs = c(2,3))

## Extract the paired data corresponding to the third reader in the first and second treatments
dataset12_33 <- DfExtractCorCbmDataset(dataset05, trts = c(1,2), rdrs = 3)

## Extract the data corresponding to the first reader in the first
## treatment paired with the data
## from the third reader in the second treatment
## (the bin indices are at different positions in the two arrays)
dataset12_13 <- DfExtractCorCbmDataset(dataset05,
trts = c(1,2), rdrs = c(1,3))

RJafroc documentation built on Nov. 10, 2022, 5:45 p.m.