convertDFtoDesignMatrix: Convert an MRMC data frame to a design matrix

In iMRMC: Multi-Reader, Multi-Case Analysis Methods (ROC, Agreement, and Other Metrics)

Convert an MRMC data frame to a design matrix

Description

Convert an MRMC data frame to a design matrix, dropping readers or cases with no observations

Usage

convertDFtoDesignMatrix(dfMRMC, modality = NULL, dropFlag = TRUE)

Arguments

dfMRMC	An MRMC data frame
modality	The score matrix depends on the modality. If more than one modality exists in the data frame, you must specify which modality to subset.
dropFlag	[logical] The default setting (TRUE) removes readers and cases that have no observations. Dropping them by default will speed up analyses. Leaving the levels (dropFlag = FALSE) is useful if you need the entire score or design matrix when comparing or doing analyses with two modalities.

Value

A matrix [nCases, nReaders] indicating which scores were reported for each reader and case

iMRMC documentation built on May 31, 2023, 8:36 p.m.