akrun questions

akrun answers

• Fill in Blank Fields With a Value From Same Key Index
• data.table mapping based on another data.table [duplicate]
• How to create a custom filter function in R
• Merging a sum by reference with data.table
• dplyr mutate on column subset (one function on all these columns combined)
• Regex pattern questions in r
• group_by and pmap a piecewise operation on each row per group (ifelse vs case_when)
• How can I use the seq function on two columns in a dataframe?
• Match data.table/data.frame with matrix that partially matches
• extend data with data.table