You're looking for ifelse
. Documentation: http://stat.ethz.ch/R-manual/R-devel/library/base/html/ifelse.html.
mydata$result <- ifelse(mydata$alive, mydata$alive_value, mydata$dead_value)
質問
Basically I'm looking for an equivalent of
for (i in 1:nrow(mydata)) {
if(mydata$alive[i]) { mydata$result[i] = mydata$alive_value; }
else { mydata$result[i] = mydata$dead_value; }
}
That would be along the lines of
mydata$result <- func_if(mydata$alive,mydata$alive_value,mydata$dead_value)
Does something like that exist?
解決
You're looking for ifelse
. Documentation: http://stat.ethz.ch/R-manual/R-devel/library/base/html/ifelse.html.
mydata$result <- ifelse(mydata$alive, mydata$alive_value, mydata$dead_value)