convertDFtoScoreMatrix | 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
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