[R] "logical indexing, " [was] match() question or needle haystack problem for a data.frame
Knut Krueger
rhe|p @end|ng |rom krueger-|@m||y@de
Thu Oct 25 16:06:52 CEST 2018
Hi Bert,
another question for indexing
1. is there a good manual for indexing
2. is it possible to get !%in%
f.e
x =data.frame("A"=c(1:5),"C"=c("A","B","C","D","E"))
y =data.frame("B"=c(1,3,5))
test = x[x$A %in% y$B,]
test = x[x$A %in% y$B,]
test
A C
1 1 A
3 3 C
5 5 E
means: the result where I am looking for is:
test
A C
2 2 B
4 4 D
no problem with a loop but in a short way I do not find a solution
Kind Regards Knut
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