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Rating Stats for

David Arenburg

Rating
1732.38 (66th) 		Reputation
80,581 (1,024th)
Page: 1 ... 9 10 11 12 13 ... 33
Title Δ
Convert continuous dataframe into binary dataframe in R +0.24
Fast way to replace all blanks with NA in R data.table +0.65
R: Insert vector into every other character of string 0.00
R data.table with variable number of columns +1.12
add number to strings in data frame 0.00
treat integers as key values rather than row indexes in `data.table... +1.04
Subsetting DataFrame in R by duplicate values for Year by lowest va... -2.30
R: calculate the quotient of 2 columns by ID +0.24
Using Tidyr/Dplyr to summarise counts of groups of strings +1.27
Identifying strings based on where substrings appear in the string +1.14
R - how to identify consecutive rows satisfying a condition in a da... +0.25
Converting particular values to NA in a dataframe in R +0.26
R - identify consecutive sequences +1.04
Apply grepl across columns by saving columns in lists? -0.17
How to match multiple corresponding values between columns in R -0.03
Create new variable in R data frame by conditional lookup 0.00
R select data that occurs before a certain date +0.25
Count occurence across multiple columns using R & dplyr 0.00
Create sequence based on grouping variable in R +0.91
Efficient replacement for for-loop when splitting strings in R +0.63
Assign unique ID based on instances of a pattern 0.00
Create new column in data frame using a for loop to calculate value... +0.23
Using data.table with replacement functions in r +0.60
r - insert row for missing monthly data and interpolate +1.12
Vlookup-match like function in R +0.80
R: apply simple function to specific columns by grouped variable 0.00
Function to change the levels of a factor variable in R -1.09
Calculate the advancement day by day of a variable's value +0.56
How to join/ merge two tables using character values? +0.55
How to search for rows with same column value and insert row if it... 0.00
How can I sort a vector based on the indices contained in a differe... +1.20
Get the (t-1) data within groups 0.00
R: Aggregating between dates without for loop +0.10
how to show an event happened between two dates in R -0.04
How to efficiently aggregate multiple data.table columns by groups,... +0.98
Remove duplicated words from data frame +0.25
Unpacking and merging lists in a column in data.frame +0.97
Inner Join with conditions in R -0.24
In R: Replacing value of a data frame column by the value of anothe... +0.27
Remove row-specific items from list -0.09
Selecting columns names in data frame not found in character string... 0.00
checking whether at least one value in a dataframe row is bigger th... +0.75
How to matching missing IDs? +0.98
Convert dataframe columns to named number vector 0.00
Identify and annotate group wise minimum values using data.table in R +1.58
Computing mahalanobis distance by group using data.table 0.00
Join two data tables to override values by date range +1.38
R - Find rows based on group factors -0.94
How to join tables and generate sums of columns? 0.00
Reshape a data frame from long to wide +0.25