How do I change a single value in a data.frame?

Question

Could anyone explain how to change a single cell in a data.frame to something else. Basically I just want to rename that one cell, not all cells which matches i

Answer 1

Suppose your dataframe is df and you want to change gender from 2 to 1 in participant id 5 then you should determine the row by writing "==" as you can see

 df["rowName", "columnName"] <- value
 df[df$serial.id==5, "gender"] <- 1