MATH 6627 2011-12 Practicum in Statistical Consulting/R: Questions and Answers

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  • Q: When I want to do linear model analysis, I know two build-in functions in R can help me finish the analysis. One is lsfit(), the other is lm(). Both of them can give me the Estimate, the Std.err, the p-value and so on. But, I don't know the difference between these two functions.

Usman's Questions

Q1: What R functions are available for diagnostics when using lme() and random effects? 
Q2: What R functions are available to calculate/plot leverage and cook's distance for mixed effects models estimated with lme()
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