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1575.13 (3,482nd) 		Reputation
32,295 (3,688th)
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Title Δ
Dynamic sum based on a condition -0.48
How to combine two vectors into pairs with separator +1.02
Regex: matching multiple patterns and getting middle of string +0.68
Find lag between non-consecutive observations -1.48
Filtering list of dataframes based on the number of observations in... -1.73
How to use cumsum-Lapply when i+1 column is needed? +2.05
Retain time series data with duration of one second in R programming +1.86
Combine matrices of different length and keep column names +1.76
Add extra rows in a data frame according to a list +1.74
revalue data with multiple conditions in r -2.48
Replace the values of a dataframe with for loop +0.34
Split a data.frame, sort and subset from a list of data.frames +1.84
Giving index numbers to time +2.10
Calculating sequences based on summary counts +0.48
How to add a suffix to multiples variables without considering NA? +0.74
find equal rows between data frames, including NA as a value -2.29
Converting data.frame to high-dimensional matrix +2.13
How to use group_by and summarise over several subsets from same da... 0.00
Sort dataframe on date and variable +0.12
Extract text and put into table -2.65
How to split a dataframe column by the first instance of a characte... +0.15
contingency table from a dataframe, keeping first column as a refer... +1.39
Replace repeating values with 0 -0.36
How to conditionally replace values with NA across multiple columns +1.67
Grouping by character matching & string length 0.00
Create a tibble row-wise using purrr +0.99
Census, households made up of couples (with or without children) bo... +2.22
Subset one column from data frame keeping the subset as a data frame -1.62
Extract range of numbers in a list +0.19
How to generate a sequence with a recurring motif that is intersper... +0.35
Group-by, aggregate to create a new column based on conditions -0.44
Recoding time series data to create time 0 for each individual -1.76
Find a groupwise maximum and print the relevant row in R +1.22
removing element from multiple data frames which are in a list +1.70
How to disambiguate repeated strings by appending varying length st... +2.02
Add flags to columns according to a condition +0.18
How to partition data, then remove groups if there are duplicates? -1.05
Add rows for skipped stages in a process -0.46
Convert column to rownames in a dataframe without prepending X +1.41
Merging datasets of which only some columns match +0.29
How to keep the values (dropping NAs) by groups? -1.31
Counting frequency +2.25
Rank groups within a grouped sequence of TRUE/FALSE and NA -1.24
How to remove empty tibbles from a list of tibbles returned by get_... -0.17
Return column heading as a value based on conditions -0.81
How to replace a specific character string with a number? -0.93
Looking up names in a data.frame with partial matching, need them s... 0.00
How to handle Date in format Like "Wednesday-September 7-2011&... -0.14
how can I harmonized columns in a data frame with string and number... 0.00
How to reshape a dataframe into percentage of categorical data +1.79