| convertDFtoScoreMatrix {iMRMC} | R Documentation | 
Convert an MRMC data frame to a score matrix, dropping readers or cases with no observations
convertDFtoScoreMatrix(dfMRMC, modality = NULL, dropFlag = TRUE)
| 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. | 
A matrix [nCases, nReaders] of the scores each reader reported for each case