data-manipulation

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R way to select unique columns from column name?
user_124169500
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89
data-manipulation r
Remove cases with a specific value in R
user_79892040
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94
data-cleaning data-manipulation r
How to merge rows using start and finish timestamps of a consecutive id count in R, but per-group basis?
user_14328650
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1
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55
data-manipulation r time
How to assign a "reseting" group number by the second grouping variable in R?
user_55885930
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2
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40
data-preprocessing data-manipulation r
Efficient recursive random sampling
user_59645570
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24
9
801
data-manipulation recursion r random performance
R: Extracting Rules from a Decision Tree
user_132038410
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6
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922
prediction decision-tree data-manipulation tree r
How to switch values in two columns based on condition in R?
user_149843650
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4
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90
data-manipulation r
How to a create a new dataframe of consolidated values from multiple columns in R
user_160973580
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2
3
72
data-manipulation r for-loop sum
Fill new column based on conditions defined in a string
user_171241410
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3
3
261
pandas data-manipulation dataframe numpy python
R: Errors in Matrix Multiplication (non-conformable arguments)
user_132038410
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3
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300
matrix-multiplication data-manipulation r matrix function
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