B. Christian Kamgang questions

B. Christian Kamgang answers

• How to identify repeated words as well as position and number of repeats in sentences
• Reorder and Group Multiple Columns by Regex/pattern
• How to sort a data frame (in R base) by all columns, without knowing all the columns beforehand
• Word count across subset of columns in one new column
• How to use if/ifelse on dplyr's group_by
• data.table grouped operations with variable names of columns without slow DT[, mean(get(colName)), by = grp]
• How to transfer dataframe `raw_df` to `list` row by row?
• R data.table split a row into multiple rows based on string values [duplicate]
• How to merge two data.tables on the closest value, but also by group in R?
• R data.table fill row NAs, by row