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Jaap

Rating
1662.99 (393rd) 		Reputation
58,717 (1,592nd)
Page: 1 ... 9 10 11 12 13 ... 23
Title Δ
Counting duplicates in R -0.64
Find consecutive values in dataframe +1.47
manipulating two data frames based on string with different lengths -0.14
Finding the index based on two data frames of strings 0.00
Counting specify value across columns in r -0.76
r - Replace values in columns +0.19
using R data.table to look up cumulative stock return values over a... +0.33
Replace specific values based on another dataframe in R +0.35
R conditional filter +0.28
Sequential Group By in R using data.table 0.00
Reshaping a data frame by reverse melt +0.34
How to reshape tabular data to one row per group +0.30
R How to create several variables containing substring characters -1.06
Grouping time and counting instances by 12 hour bins in R +1.26
How do I calculate aggregates on a dataset which needs grouping? 0.00
Repeating row values for 3-digit character sequence - tidy data +1.63
Subsetting groups with three observations on different days in R +0.53
R: Seperating a column in a csv file based on a Time Variable -0.11
Find sum of previous n rows in dataframe 0.00
Convert hour to date-time +0.36
Making a character string with column names with zero values +0.24
How to convert a date to YYYYDDD? +1.22
extract data between a pattern from a text file in R +0.79
Unique rows in data.frame +1.50
R change $xxx.xx to xxx.xx for both positive and negative numbers b... +1.39
wide format with dcast data.table +1.64
adding column to data table using rollmeanr 0.00
create data frame with multiple columns that are all rolling averag... 0.00
how to lapply to one column in a list of data tables +0.36
Sort data frame that has multiple date columns in R 0.00
Subset matrix based on cell values and drop rows/columns which don&... -0.96
Add column detailing which year data is from (In R) +0.36
Clip/ Limit Geom_Line plotting 0.00
dplyr: how to use mutate function to make a key combining a prefix... +1.34
OR function for character values in R +0.39
r- r2dtable contingency tables are too concentrated 0.00
Divide one column of data frame by condition from another column +1.61
How to find columns that fit an specific range (per individual) and... +2.62
R cleaning csv file +0.38
R: Bar plot without grouping variable +2.42
Creating a list of data frames (or some other structure) from a mes... -0.01
R: Filter/subset dataframe to threshold of change 0.00
ggplot: Avoiding adding up factor variable in x-axis 0.00
R:Creating a panel data frame based on two other dataframes +0.16
R: customized index column +0.70
Count rows before event - data.table +0.28
How to delete duplicated numeric vector elements based on name attr... 0.00
Selecting rows with partial match/mismatch in 2 columns +0.34
Counting unique days in R with overlap and gaps in date ranges -0.53
sorting based on all columns element and select with a threshold +0.39