Re: [R] removing outliers in non-normal distributions

2011-09-28 Thread Christian Hennig
Dear Ben, not specifically an R-related response, but the best "philosophy" of defining outliers, as far as I'm concerned, you'll find in Davies and Gather, "The identification of multiple outliers", JASA 1993. The idea is that you can only properly define what an outlier is relative to a r

[R] removing outliers in non-normal distributions

2011-09-28 Thread Ben qant
Hello, I'm seeking ideas on how to remove outliers from a non-normal distribution predictor variable. We wish to reset points deemed outliers to a truncated value that is less extreme. (I've seen many posts requesting outlier removal systems. It seems like most of the replies center around "why do