Hello! I have encountered a really weird problem. Maybe you've encountered it before? I have a large data frame "importances". It has one factor ($A) with 3 levels: 3, 9, and 15. $B is a regular numeric variable. Below I am picking a really small sub-frame (just 3 rows) based on "indices". "indices" were chosen so that all 3 levels of A are present:
indices=c(14329,14209,14353) test=data.frame(yy=importances[["B']][indices],xx=importances[["A"]][indices]) Here is what the new data frame "test" looks like: yy xx 1 -0.009984006 9 2 -2.339904131 3 3 -0.008427385 15 Here is the structure of "test": >str(test) 'data.frame': 3 obs. of 2 variables: $ yy: num -0.00998 -2.3399 -0.00843 $ xx: Factor w/ 3 levels "3","9","15": 2 1 3 Notice - the order of factor levels for xx is not 1 2 3 as it should be but 2 1 3. How come? Or also look at this: >test$xx [1] 9 3 15 Levels: 3 9 15 Same thing. Do you know what might be the reason? Thank you very much! -- Dimitri Liakhovitski MarketTools, Inc. dimitri.liakhovit...@markettools.com ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.