Hi,
You could use:
which(a%in%b)
#[1] 1 2 3 4 5
a1<-c(1,2,5)
b1<-c(1,3,4,5,7)
which(a1%in%b1)
#[1] 1 3
A.K.
Hello! I created the following function for calculating which elements
in vector a are existant in vector b. However, all I get is NA NA NA and I
can´t figure out why. =/
fun <- function(a, b) {
y <- rep(NA, length(a))
x <- 0
while (x <= length(b)) {
x <- x + 1
for (i in 1:length(a)) {
y[i]<- (a[i] == b[x])
}
}
return(y)
}
fun(a<-1:5,b<-1:9)
Thanks for any help!
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