Skip to content
Prev 245908 / 398503 Next

Faster way to do it??...using apply?

M.Ribeiro 
Hi, 
I have a simple task, but I am looking for a clever and fast way to do it:

I have a vector x with 0,1 or 2 and I want to create another vector y with
the same length following the rules:
If the element in x is equal to 0, the element in y is equal to 0
If the element in x is equal to 2, the element in y is equal to 1
If the element in x is equal to 1, the element in y is either 0 or 1 (sample
from c(0,1))

thus the vector
[,1]
[1,]    0
[2,]    2
[3,]    1
[4,]    2
[5,]    0
[6,]    1
[7,]    2

could produce the vector y (this is one of the possibilities since y|x=1 is
either 0 or 1
[,1]
[1,]    0
[2,]    1
[3,]    1
[4,]    1
[5,]    0
[6,]    0
[7,]    1


I know how to do this using for loops but I was wondering if you guys could
suggest a better way
Thanks

Thread (5 messages)

M.Ribeiro Faster way to do it??...using apply? Dec 28 Henrique Dallazuanna Faster way to do it??...using apply? Dec 28 M.Ribeiro Faster way to do it??...using apply? Dec 28 Henrique Dallazuanna Faster way to do it??...using apply? Dec 28 Jonathan P Daily Faster way to do it??...using apply? Dec 28