akrun questions

akrun answers

• 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
• Using vectors inside dataframe columns in R
• R- New column based on present values from other columns
• Remove characters after dash in a mixed string in R
• Modify multiple columns of dataset by the same function in R
• Multi-group rankings using data table package
• How can I replace specific values of all elements in a list
• Create a new variable that is the average of one variable conditional on two other variables (and maintain all other variables in the data set)