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sindri_baldur

Rating
1543.60 (10,175th) 		Reputation
8,049 (19,576th)
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Title Δ
Accessing column name within the SD construct -1.67
Find last date of previous week using data.table in R +1.21
Insert and populate two columns based on column wise conditions +0.10
How to index a data.table with different types of key 0.00
How to solve a problem with vectorisation in R? +0.53
On a column in a data.table, record "by = ..."-stratified... 0.00
Calculate row sums conditional on column with 1 and 0's in a da... +0.43
How to convert String of array to Integer array -0.87
Change column with different formats into dates -0.21
Wide to long data transformation multiple columns -1.45
How to create pattern table in R 0.00
How to replace NA values sbased on a known value at a specific year? -0.72
Unnest or unchop dataframe containing lists of different lengths -1.61
Adding and repeating a list in a Data Frame for each ID in R -0.14
R/data.table: optimize "recursive" groupby +0.50
Renaming Variables Dynamically -2.12
Combing data frame rows in R based on common values -1.34
data.table efficient recycling +1.48
Sum a row of specific columns, then find ratio of row, column entry... -0.64
R: Add column to dataframe based on partial matching characters +2.22
Count occurences of lists efficiently +0.17
split character columns and get names of field in string +2.24
What's the easiest way for the multiple if-else conditions? +0.51
data.table assign new columns based on variable 0.00
How to move a column down one without deleting a row in R +0.34
For each word in a string, check if it is part of another string of... 0.00
Collapse a dataframe, creating new columns with name being the uniq... +0.51
Assign value to variables in a loop with some conditions in R 0.00
R - find the most/least occuring value and ratio for columns in a d... +1.11
Casting the row maxima from long to wide +0.86
Wrangle data in R -0.11
Merge two large data.tables based on column name of one table and c... +1.68
Check which rows in a data.table are identical +0.51
list of vectors in R - extract an element of the vectors +1.18
Normalize a vector by extending/compressing it to a given length -0.13
How to convert month date (mm.yy) in R to month date (mon yyyy) -0.72
Convert JSON array of arrays to data.frame 0.00
Showing rows of zeros when using .N -1.28
selecting data from a R data table from a set of variables occurrin... -0.18
Change the format of your data 0.00
Could I subset a data.table by row using logical subsetting and key... +2.04
Paste named vector R 0.00
multiply columns with similar names -1.32
Remove specific rows according a text in R -0.81
Separate a shopping list into multiple columns -1.84
Separate a shopping list into multiple columns -0.73
Get index of data.table column that matches a value +0.42
How to filter my data.table by condition and by group? 0.00
Subtract rows with numeric values and ignore NAs -0.01
Replacing NA's with values from another row, conditional on a s... +2.44