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SIMR : an R package for power analysis of generalized linear mixed models by simulation

2015; Wiley; Volume: 7; Issue: 4 Linguagem: Inglês

10.1111/2041-210x.12504

2041-210X

Peter Green, Catriona J. MacLeod,

Economic and Environmental Valuation

Summary The r package simr allows users to calculate power for generalized linear mixed models from the lme 4 package. The power calculations are based on Monte Carlo simulations. It includes tools for (i) running a power analysis for a given model and design; and (ii) calculating power curves to assess trade‐offs between power and sample size. This paper presents a tutorial using a simple example of count data with mixed effects (with structure representative of environmental monitoring data) to guide the user along a gentle learning curve, adding only a few commands or options at a time.