simMRMC {iMRMC}R Documentation

Simulate an MRMC data set ####

Description

This program simulates observations from one set of readers scoring one set of cases. It produces one modality and one truth state of ROC data following Roe1997_Acad-Radiol_v4p298 and Roe1997_Acad-Radiol_v4p587. In order to produce an entire ROC data set, please use sim.gRoeMetz.

Usage

simMRMC(simMRMC.config)

Arguments

simMRMC.config

[list] of simulation parameters:

  • modalityID [chr] label modalityID

  • readerIDs [factor] the ID of each reader

  • caseIDs [factor] the ID of each case

  • mu [num] mean

  • var_r [num] variance of random reader effect

  • var_c [num] variance of random case effect

  • var_rc [num] variance of random reader by case effect

Details

The simulation is a linear model with one fixed effect and three normally distributed independent random effects corresponding to readers, cases, and an interaction between the two.

L.rc = mu + readerEffect.r + caseEffect.c + readerXcaseEffect.rc

Value

L [data.frame] with nC*nR rows of 4 variables


[Package iMRMC version 1.2.0 ]