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 1.2.5 Index]