I have a sample data frame with the following format.
First name Middle name Last name
1 Andy Brad None
2 Alex Cian None
3 Brad Edward None
4 Brad Dan Craig
5 Liam Chat Meny
In a data frame, how do I get the last name where a name is provided (Craig, Meny) to replace the name in 'Middle Name' column whilst all the rest stays the same.
Output required
First name Last name
1 Andy Brad
2 Alex Cian
3 Brad Edward
4 Brad Craig
5 Liam Meny