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Hi all, In short: I'm running ddply on an admittedly (somehow) large data.frame (not that large). It runs fine until it finishes and gets to the "collating" part where all subsets of my data.frame have been summarized and they are being reassembled into the final summary data.frame (sorry, don't know the correct plyr te...

...tor1', length(vector1)).......)) boxplot(dat ~ ind, data = comb) But how do I do this i a loop? I know the vector names (according to the filenames in the working directory), but I do not how to access them in my R code after having assigned the names. I guess the "lapply" or "dply" from the plyr library can do this, but I seem not to be able to do it. Is there a way to do this? gma [[alternative HTML version deleted]]

...ation in general) on the plyr mailing list. Sign up at http://groups.google.com/group/manipulatr. Version 1.5 ------------------------------------------------------------------------------ NEW FEATURES * new `strip_splits` function removes splitting variables from the data frames returned by `ddply`. * `rename` moved in from reshape, and rewritten. * new `match_df` function makes it easy to subset a data frame to only contain values matching another data frame. Inspired by http://stackoverflow.com/questions/4693849. BUG FIXES * `**ply` now works when passed a list of functions * `*dp...

...ation in general) on the plyr mailing list. Sign up at http://groups.google.com/group/manipulatr. Version 1.5 ------------------------------------------------------------------------------ NEW FEATURES * new `strip_splits` function removes splitting variables from the data frames returned by `ddply`. * `rename` moved in from reshape, and rewritten. * new `match_df` function makes it easy to subset a data frame to only contain values matching another data frame. Inspired by http://stackoverflow.com/questions/4693849. BUG FIXES * `**ply` now works when passed a list of functions * `*dp...

...ons * built-in error recovery * the choice of passing chunks as rows or as variables plyr functions are named according to the type of object they input (first letter) and output (second letter): * llply = from a list to a list * alply = from an array (or vector, or matrix) to a list * ldply = from a list to a data.frame * d_ply = from a data.frame, ignore output * and so on for llply, laply, ldply, l_ply, alply, aaply, adply, a_ply, dlply, daply, dply, d_ply plyr also provides: * m*ply which works in a similar way to mapply * r*ply which works in a similar way to replicate...

...ing a 20 page introductory guide, http://had.co.nz/plyr/plyr-intro.pdf. You can ask questions about plyr (and data-manipulation in general) on the plyr mailing list. Sign up at http://groups.google.com/group/manipulatr plyr 1.1 (2010-07-19) --------------------------------------------------- * *dply deals more gracefully with the case when all results are NULL (fixes #10) * *aply correctly orders output regardless of dimension names (fixes #11) * join gains type = "full" which preserves all x and y rows -- Assistant Professor / Dobelman Family Junior Chair Department of Statistic...

...ons * built-in error recovery * the choice of passing chunks as rows or as variables plyr functions are named according to the type of object they input (first letter) and output (second letter): * llply = from a list to a list * alply = from an array (or vector, or matrix) to a list * ldply = from a list to a data.frame * d_ply = from a data.frame, ignore output * and so on for llply, laply, ldply, l_ply, alply, aaply, adply, a_ply, dlply, daply, dply, d_ply plyr also provides: * m*ply which works in a similar way to mapply * r*ply which works in a similar way to replicate...

...ing a 20 page introductory guide, http://had.co.nz/plyr/plyr-intro.pdf. You can ask questions about plyr (and data-manipulation in general) on the plyr mailing list. Sign up at http://groups.google.com/group/manipulatr plyr 1.1 (2010-07-19) --------------------------------------------------- * *dply deals more gracefully with the case when all results are NULL (fixes #10) * *aply correctly orders output regardless of dimension names (fixes #11) * join gains type = "full" which preserves all x and y rows -- Assistant Professor / Dobelman Family Junior Chair Department of Statistic...

Hi All. I often find myself in this situation: . Based on some vector (or list) of values, I need to calculate a few new values for each of them, where some of the new values are numbers, but some are more of descriptive nature (so: character strings) . So I use e.g. sapply, passing a custom function that returns a list with all the calculated values . The result of