Displaying 2 results from an estimated 2 matches for "fratio".
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2013 May 16
2
R looping help
...model<-lm(yi~xi)
stands[st]<-Stand[i-1]
intercepts[st]<-model$coefficients[1]
slopes[st]<-model$coefficients[2]
mses[st]<-sum(resid(model)^2)/(length(xi)-2)
ssr<-var(yi)*(length(xi)-1)-sum(resid(model)^2)
rsquares[st]<-ssr/(var(yi)*(length(xi)-1))
fRatio<-ssr/mses[st]
pValues[st]<-1-pf(fRatio,1,length(xi)-2)
#Increment the stand number, zero the within stand collections,
#and start again
st<-st+1
xi<-numeric(0)
yi<-numeric(0)
xi[1]=X[i]
yi[1]=Y[i]
}
}
#Make your data set
standEstimates<-data.frame...
2007 May 23
0
Replicated LR goodness-of-fit tests, heterogeneity G, with loglm?
...(cov)))-1
probp = pchisq(Gp,
dfp, lower.tail=F)
#total G
Gt = sum(G)
dft = sum(dfs)
probt = pchisq(Gt,
dft, lower.tail=F)
#heterogeneity G
Gh = Gt-Gp
dfh = dft - dfp
probh = pchisq(Gh,
dfh, lower.tail=F)
#F ratio
Fratio =
(Gp/dfp)/(Gh/dfh)
probf = pf(Fratio,
dfp, dfh, lower.tail=F)
res = list(TotG=c(Gt, dft, probt), PooledG=c(Gp, dfp,
probp),
HetG=c(Gh, dfh, probh), Fratio=c(Fratio, dfp, dfh, probf))
res
} #end hetg
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