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aor
2012 May 16
2
Help needed for efficient way to loop through rows and columns
...ple":
names <- c("S1", "S2", "S3", "S4")
X <- c("BB", "AB", "AB", "AA")
Y <- c("BB", "BB", "AB", "AA")
Z <- c("BB", "BB", "AB", NA)
AorB <- c("A", "A", "A", "B")
sample <- data.frame(names, X, Y, Z, AorB)
for a given row,
if AorB == A, then AA == 2, AB = 1, BA = 1, BB = 0
if AorB == B, then AA == 0, AB = 1, BA = 1, BB = 2
I've been trying to write this using apply and ifelse s...