| UtilLesionDistrVector {RJafroc} | R Documentation |
Get the lesion distribution vector of a dataset
Description
The lesion distribution vector for a dataset.
Usage
UtilLesionDistrVector(dataset)
Arguments
dataset |
A dataset object. |
Details
Two characteristics of an FROC dataset, apart from ratings,
affect the FOM: the distribution of lesions per case and the distribution
of lesion weights. This function addresses the distribution of lesions per
case. The distribution of weights is addressed in UtilLesionWeightsMatrix.
lesDistr is a 1D-array containing the fraction of unique
values of lesions per diseased case in the dataset. For ROC or LROC data
this vector is c(1), since all diseased cases contain one lesion.
For FROC data the length of the vector equals the maximum number of lesions
per diseased case. The first entry is the fraction of dis. cases containing
one lesion, the second entry is the fraction of dis. cases containing two lesions, etc.
See PlotRsmOperatingCharacteristics for a function that depends on
lesDistr.
Value
lesDistr The 1D lesion distribution array.
Examples
UtilLesionDistrVector (dataset01) # FROC dataset ## [1] 0.93258427 0.06741573
UtilLesionDistrVector (dataset02) # ROC dataset ## 1