Top network posts

• 142 How to apply same function to every specified column in a data.table
• 103 Select first and last row from grouped data
• 43 Why is the diag function so slow? [in R 3.2.0 or earlier]
• 38 Create a dataframe with random numbers in each column
• 29 Creating dummy variables in R data.table
• 26 Efficient way to find repeated runs of rows, remove, & count
• 24 Replicating rows in data.table by column value
• View more network posts →