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20 TechQA 2015-06-05T08:41:42.137000How to select specific elements and find their index in a data.frame?
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merge or mutate a summary (dplyr)
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Asked by user3310782
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Refer particular value in `dplyr::mutate()`
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Best practice to get a dropped column in dplyr tbl_df
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Asked by Dieter Menne
use column-name range in data.table like in dplyrs select
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Asked by grrgrrbla
dplyr rename_ produces an error when renaming columns with spaces
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Asked by daj