[R] ifelse statement with two vectors of different length

[Adel]

Dear list-members,

I have the following problem: I have a vector (countrydiff) with length 72
and another vector (long_df$country_name) which is about 12000 long.
Basically what I want to do is to if the factor level (or string name) in
long_df$country_name appears on the countrydiff, then long_df$povdat should
be equal to 1, if it does not appear on the countrydiff vector then
long_df$povdat should be equal to zero. I have tried different combinations
and read some. The following code should in my mind do it, but it doesn’t:

long_df$povdat<-ifelse(long_df$country_name == countrydiff, 1, 0)

long_df$povdat<-ifelse(long_df$country_name %in% countrydiff, 1, 0)

Additional information: the factor vector countrydiff contains unique
country names (Albania, Zimbabwe etc.), whereas long_df$country_name also
contains country names albeit not unique since it is in longform. The unique
names that appear in long_df$country_name is around 200.


Any suggestions?
Thanks in advance.

Best
Adel




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