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Faster ways to calculate frequencies and cast from long to wide
r
aggregate
reshape2
plyr
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Reshape three column data frame to matrix ("long" to "wide" format)
r
reshape
dataframe
matrix
plyr
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Why does summarize or mutate not work with group_by when I load `plyr` after `dplyr`?
r
r-faq
plyr
dplyr
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