create new variable with ifelse? (reproducible example)

Hi Niklas,

I like A.K.'s method. Here's another way to do what I think is the same
thing you're asking for (this is how I did it before I knew ifelse()
existed!)

rep_data$clo <- 0
rep_data[ rep_data$know %in% c("very well", "fairly well") &
rep_data$getalong %in% c(4,5),]$clo <- 1

Best,
Steve

------------------------------

Message: 25
Date: Sat, 15 Sep 2012 23:36:49 +0300
From: Niklas Fischer <niklasfischer980 at gmail.com>
To: r-help at r-project.org
Subject: [R] create new variable with ifelse? (reproducible example)
Message-ID:
         <CADWGO2zANM_UK8qf=JLZHRSqgtPC=NX+rU2kXx=1etw0uQvxRg at mail.gmail.com>
Content-Type: text/plain

Dear R users,

I have a reproducible data and try to create new variable "clo" is 1  if
know variable is equal to "very well" or "fairly well" and getalong is 4 or
5
otherwise it is 0.

rep_data<- read.table(header=TRUE, text="
            id1        id2        know getalong
    100000016_a1 100000016_a2   very well        4
    100000035_a1 100000035_a2 fairly well       NA
    100000036_a1 100000036_a2   very well        3
    100000039_a1 100000039_a2   very well        5
    100000067_a1 100000067_a2   very well        5
    100000076_a1 100000076_a2 fairly well        5
")


rep_data$clo<- ifelse((rep_data$know==c("fairly well","very well") &
rep_data$getalong==c(4,5)),1,0)

For sure, something must be wrong, I couldn't find it out.

rep_data

                       id1    id2 know getalong clo
100000016_a1 100000016_a2   very well        4   0
100000035_a1 100000035_a2 fairly well       NA   0
100000036_a1 100000036_a2   very well        3   0
100000039_a1 100000039_a2   very well        5   0
100000067_a1 100000067_a2   very well        5   0
100000076_a1 100000076_a2 fairly well        5   0

Any help is appreciated..
Bests,
Niklas

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