convertDFtoDesignMatrix {iMRMC} | R Documentation

## 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

[Package iMRMC version 1.2.0 ]