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Rating Stats for

Jaap

Rating
1662.99 (393rd)

Reputation
58,717 (1,592nd)

Page: 1 2 3 4 5 ... 23

Title	Δ
How to add expand a data table based on table information	+0.29
NA to dates with data.table	+0.30
Calculating conditional cumulative time	-1.04
Homogenize use of single and double digit numbers in string	+0.97
How to use a named variable within a function	-0.36
data.table replicate rows after join?	0.00
Convert columns to sub-field by grouping	+1.25
How to generate a lag variable (endogenous lag) that captures previ...	+1.30
How to replace multiple values at once	+0.88
Count number of unique values before a certain pattern?	+0.88
Reshaping a data.frame with tidyr	0.00
Create an Index of Cumulative Returns from Monthly Stock Returns	0.00
Replace Values with NA by same position in another df	+1.09
How to efficiently count unique (numeric) column vectors of a data....	+0.73
How to dcast a dataframe	0.00
Aggregate a table by applying a function of multiple columns	0.00
Split date into several chunks ending by YYYY-12-31	+1.05
Ifelse statement with multiple conditions using dplyr::mutate/mutat...	0.00
Using gsub to seperate 1 and 11 from Q1 and Q1Q1 to Q1 and Q2	-0.72
Finding phrases without exact match using %in%	+0.28
strsplit by dot and underscore and paste data into two columns	-0.57
Subset a special case in R	0.00
Reading .tsv files from different folders into R environment and ad...	0.00
Filter rows based on two criteria	-0.62
ggplot2 pie chart, numbers don't appear	0.00
Find all the zeroes over a diagonal of a data frame	+1.12
Calculate cumsum from the end towards the beginning	0.00
Update columns by joining more than one columns	+0.99
Using indexing to subset rows in a data.table	+1.12
Shift in datatable evaluation	0.00
Expand data frame with intervening observations	-1.31
Check condition and return name of column for which the condition i...	+0.16
Incremental sequences with interruptions	+0.85
Join 2 dataframes together if two columns match	+1.31
Sort data in a data frame according to the numbers in a factor	+0.86
sprintf(): number of decimal places as an argument	-1.84
How to append 2 data sets one below the other having slightly diffe...	0.00
Update rows depending on the value in following rows in multiple co...	+1.28
Read a text file with readr where a quote ends rows	+0.29
How to merge multiple data tables with specific conditionals on NA&...	0.00
Conditional fill value in Dataframe	-0.19
Number of minutes until a bike is taken/placed in a public station	0.00
List files based on files name	0.00
R for loop very slow due to repetitively filtering large dataframe	0.00
Match vectors in sequence	-1.59
Adjust vector subset values according to certain rules	0.00
Calculate product of frequencies in each column	+1.04
Filter a data frame according to minimum and maximum values	-1.98
Filter dataframe using a second dataframe value by value	+0.95
How to delete rows in one table, based on the values of another table	0.00