data-manipulation

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How to obtain the unique record of a cross joined table based on the dates of two different columns?
user_147397610
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pandas-groupby ranking data-manipulation sorting python
R: Grouping the Index's of Rows
user_132038410
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32
dplyr data-manipulation r
Replace duplicates with NA after the maximum in a series has been reached
user_13080310
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4
56
data-manipulation dataframe r
R: replacing <NA> within factor variables as 0
user_132038410
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297
missing-data na data-manipulation r
How can we check if any 2 intervals of a unique ID overlaps?
user_60425760
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9
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154
tidyr dplyr data-manipulation r performance
Perform MAD calculation on two different columns of a dataframe in R
user_163363280
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2
1
59
data-manipulation r
How to manipulate large arrays R
user_130386630
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2
2
218
rbind data-manipulation r
Calculating mean of means by groups with conditions in R
user_131428310
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4
3
126
data-manipulation grouping dataframe r
R Warning: "data length is not a sub-multiple or multiple of the number of rows"
user_132038410
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2
0
1546
plyr data-manipulation dataframe r list
Subsetting multiple rows from same column based on condition in additional column in data.table
user_48480290
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2
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104
data.table data-manipulation filtering r
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