Dear Engin, On 2020-07-29 16:57 +0300, Engin Yılmaz wrote: > Dear > > I try to create a new subset from my dataframe. > My dataframe's name is m1. > "Classification Description" column has 15 different factors. > The following code is used creating a subset for 1 factor. > m2<-m1[m1$`Classification Description` == levels(m1$`Classification > Description`)[1],] > > My aim is to create a subset with 4 different factors. For example, > levels(m1$`Classification Description`)[1] > levels(m1$`Classification Description`)[15] > levels(m1$`Classification Description`)[2] > levels(m1$`Classification Description`)[4] > > I try to following code but it didnt work > > m2<-m1[m1$`Classification Description` == levels(m1$`Classification > Description`)[c(1,15,2,4],]
You're almost correct, you just need to
use match instead of ==:
m1[m1$`Classification Description` %in%
levels(m1$`Classification Description`)[c(1, 15, 2, 4)],]
Read more about it at ?match (?`%in%`).
Best,
Rasmus
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