Finding the index or unique values from a dataframe column

Question

I have a dataframe

TableName Function Argument
A         func1    3
B         func1    4
A         func2    6
B         func2    2
C         func1    5
         


        

Answer 1

No need for any package. Try out:

aggregate(rownames(df) ~ TableName, df, c)
  TableName rownames(df)
1         A         1, 3
2         B         2, 4
3         C            5
# or
setNames(aggregate(rownames(df) ~ TableName, df, c),
         c("TableName", "Index"))
  TableName Index
1         A  1, 3
2         B  2, 4
3         C     5