Hi!
I have a data frame that has 17 variables: code (with 46 codes of stations of air measurement) and 16 variables that are years (from 2000 to 2015). I want to get a dataframe with two variables (code and year) from this dataframe. I tried transposing it, but it is not what I need.
What I want is like doing the contrary that the function spread from tidyr does.
Thanks in advance and happy 2020!!