On Aug 25, 2012, at 7:12 PM, inti luna wrote:
Hello,
I need help comparing two variables and producing a third variable
with the
result.I have this data:
id <-c(1,2,3,4,5,6,7,8,9,10)
vi <-c(1,0,1,1,1,1,1,2,2,0)
vi2 <-c(0,1,1,1,1,1,1,2,0,0)
data<-cbind(id,vi,vi2)
For the data in the example, I need to generate:
id <-c(1,2,3,4,5,6,7,8,9,10)
correct <-c(0,0,1,1,1,1,1,1,0,1)
correct_data<-cbind(id,correct)
correct <- (vi == vi2) # although parens are superfluous
The cbind() operation coerces the logical vector to numeric.
Matrix "correct_data"is the result of comparing "vi" with "vi2" and
see if
they match. If the values are the same correct value=1 and if not
correct
value=0 keeping the same id position.
How can I do this? I tried with match and with %in% but is not
exactly what
I need.
Thanks in advance!
Inti Luna
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