search for: sdepower

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2012 Feb 01
1
Simulation confidence interval
...ode snippet from a power simulation program that I'm using: ? estbeta<-fixef(fitmodel) ?sdebeta<-sqrt(diag(vcov(fitmodel))) ? for(l in 1:betasize) ? {? ?? cibeta<-estbeta[l]-sgnbeta[l]*z1score*sdebeta[l] ??? if(beta[l]*cibeta>0)????????????? powaprox[[l]]<-powaprox[[l]]+1 ????? sdepower[l,iter]<-as.numeric(sdebeta[l]) ? } ? Estbeta recovers the fixed effects from a model fitted using lmer. Beta is defined elsewhere and is a user specified input that relates the?data generated in the simulation to an oucome.? So, it seems pretty clear that the third line from the bottom is a c...