search for: xlevles

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2011 Oct 20
1
effect function in the effects package
...ck. see the codes below: ############################################################################## myologit <- polr(factor(warm) ~ yr89 + male + white + age + ed + prst, + data=ordwarm2, method=c("logistic")) require(effects) plot(effect("age", myologit, xlevles=list(age=seq(20, 80, 5), given.values(male=1, yr89=1)))) ############################################################################## I got the following error message: Warning message: package 'effects' was built under R version 2.13.2 Error in plot(effect("age", myologit, x...