KU99 questions

KU99 answers

• Which rows/columns are duplicates of which others in R matrices?
• Subtracting rows based on conditions in other columns
• Extract all characters to the left of a list of possible characters
• Create Sub Headers in R
• count distinct and calculate percent differences in two columns ifrom R dataframe
• In R, how create new dataframe with number of occurrences of each strings on other dataframe, like a product list and products in basket sold
• How to find combination of two values such that the ratio and sum of those is fixed to certain numbers with R
• Mutating across multiple columns to create percent score in R
• padding spaces inside/ in the middle of string to specific number of characters
• Combine 3 columns into 2 columns and omit NAs