SsFrocSampleSize | R Documentation |
RSM fitted model for FROC sample size
SsFrocSampleSize(dataset, effectSizeROC, JPivot, KPivot, lesDistr)
dataset |
The pilot dataset. |
effectSizeROC |
The effect size in ROC-AUC units |
JPivot |
The number of readers in the pivotal study |
KPivot |
The number of cases in the pivotal study |
lesDistr |
A 1D array containing the probability mass function of number of lesions per diseased case in the pivotal FROC study. |
See https://dpc10ster.github.io/RJafrocQuickStart/froc-sample-size.html for explanation of the FROC sample size estimation procedure.
A list containing:
effectSizeROC
, the specified ROC effect size.
scaleFactor
, the factor by which the ROC effect size
must by multiplied to get the wAFROC effect size.
powerRoc
, the ROC power.
powerFroc
, the wAFROC power.
## Examples with CPU or elapsed time > 5s
## user system elapsed
## SsFrocSampleSize 8.102 0.023 8.135
## SsFrocSampleSize(DfExtractDataset(dataset04, trts = c(1,2)),
## effectSizeROC = 0.03, JPivot = 5, KPivot = 100, lesDistr = c(0.69, 0.2, 0.11))
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