I am an beginner in R and don`t find a solution for the following problem. Any help would be really appreciated!
I have a data.frame and want to replace certain values of a column with defined other values.
data.frame
date<-c("19921231","19931231","19941231","19941231","19931231","19941231")
variable<-c("a","a","a","b","b","b")
value<-c(1:6)
dataframe <- data.frame(date,variable,value)
attempt to solve problem
yearend<-c("19921231","19931231","19941231")
year<-c("1992","1993","1994")
map = setNames(yearend,year)
dataframe[] = map[dataframe]
error message
Error in map[dataframe] : invalid subscript type 'list'
The problem is obviously, that it is not a matrix. What is the most efficient way to solve this problem? It should also work if I want to replace "real" character, e.g. "BGSFDS" with "BASF stock".