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Questions tagged plyr

9 questions

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12
votes
4
answers

R Dynamically build "list" in data.table (or ddply)

r data.table plyr aggregation
asked 2013-02-06T04:29:53.850
8
votes
2
answers

What is the ggplot2/plyr way to calculate statistical tests between two subgroups?

r ggplot2 plyr
asked 2012-09-26T14:27:57.790
8
votes
2
answers

Finding the column number and value the of second highest value in a row

r dataframe plyr
asked 2012-04-24T11:21:03.680
25
votes
7
answers

Group by multiple columns and sum other multiple columns

r grouping aggregate plyr data.table
asked 2011-11-21T13:38:06.307
9
votes
3
answers

Multiple density graphs different groups (based on factor level) using plyr

r loops graphics plyr
asked 2011-11-13T16:04:27.657
15
votes
1
answers

Can `ddply` (or similar) do a sliding window?

r plyr
asked 2011-08-29T04:14:16.257
14
votes
1
answers

Is there an implementation of Hadley's ddply for python?

python r plyr
asked 2011-06-22T01:50:03.303
18
votes
3
answers

zipping lists in R

r plyr lapply
asked 2011-05-26T22:18:37.180
9
votes
2
answers

How do I sub sample data by group using ddply?

r plyr
asked 2010-05-27T16:49:03.300