Nested if statement within for loop

Question

I need to fix this if statement nested in a for loop.

Create Column: GroupAllFemalesBoysLived

This column looks at all ticket numbers that have the same value and then returns a 1 if all females (women and children) and all boys (male children) survived within that group (all ticket numbers are the same), else returns a 0.

for (loopitem in titanic1$Ticket) {
    if (titanic1$Gender == "Male Child" & titanic1$Survived == 1 && 
        titanic1$Gender == "Female Child" & titanic1$Survived == 1 && 
        titanic1$Gender == "Female Adult" & titanic1$Survived == 1) 
        {titanic1$GroupAllFemalesBoysLived = 1} 
    else {titanic1$GroupAllFemalesBoysLived = 0}
}

I am getting this error message:

Warning message in if (titanic1$Gender == "Male Child" & titanic1$Survived == 1 && : “the condition has length > 1 and only the first element will be used”

Why are you mixing `&` with `&&`? And the `for` loop variable `loopitem` is not used. — Rui Barradas, Oct 24 '21 at 15:41
In R language `&` is vectorized while `&&` is not. The same is with `|` and `||`. See here — TarJae, Oct 24 '21 at 15:44

score 0 · Accepted Answer · answered Oct 24 '21 at 15:49

0

There's no need for a loop, R is vectorized.

cond1 <- titanic1$Survived == 1
cond2 <- titanic1$Gender %in% c("Male Child", "Female Child","Female Adult")
titanic1$GroupAllFemalesBoysLived <- cond1 & cond2

answered Oct 24 '21 at 15:49

Rui Barradas

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Nested if statement within for loop

Create Column: GroupAllFemalesBoysLived

This column looks at all ticket numbers that have the same value and then returns a 1 if all females (women and children) and all boys (male children) survived within that group (all ticket numbers are the same), else returns a 0.

1 Answers1