I am trying to create a new variable "season" from month variable by using the following script:

alldata_n %>%
mutate(
season = case_when(
  month %in% 10:12 ~ "Fall",
  month %in%  1:3  ~ "Winter",
  month %in%  4:6  ~ "Spring",
  month %in%  7:9  ~ "Summer" ))

This is working but when i use the function to see the variable, the "season" variable doesn't show up.

alldata$
 

I tried to save the data in csv format but even then the save data doesn't show any "season" variable. Where am i going wrong? Can someone please help me with this?

Thanks in advance

CodePudding user response：

There are 2 issues with this piece of code.

1. The variable alldata_n is mutated, but never stored.
2. Observe that the name alldata is not equal to alldata_n

So it should look like:

alldata <- alldata_n %>%
mutate( season = case_when(
month %in% 10:12 ~ "Fall",
month %in% 1:3 ~ "Winter",
month %in% 4:6 ~ "Spring",
month %in% 7:9 ~ "Summer" ))

Calling alldata$season now works.