search for: rapton

Displaying 2 results from an estimated 2 matches for "rapton".

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2009 Sep 04
3
Using anova(f1, f2) to compare lmer models yields seemingly erroneous Chisq = 0, p = 1
Hello, I am using R to analyze a large multilevel data set, using lmer() to model my data, and using anova() to compare the fit of various models. When I run two models, the output of each model is generated correctly as far as I can tell (e.g. summary(f1) and summary(f2) for the multilevel model output look perfectly reasonable), and in this case (see below) predictor.1 explains vastly more
2009 May 12
1
Using loops to run functions over a list of variables
Hello, I have a data set with many variables, and often I want to run a given function, like summary() or cor() or lmer() etc. on many combinations of one or more than one of these variables. For every combination of variables I want to analyze I have been writing out the code by hand, but given that I want to run many different functions over dozens and dozens of variables combinations it is