The ifelse function is simple and powerful and can help in data manipulation within R. Here I create a categoric variable from specific values in a numeric variable
> data(iris)
> iris$Type=ifelse(iris$Sepal.Length<5.8,”Small Flower”,”Big Flower”)
> table(iris$Type)
Big Flower Small Flower
77 73
The parameters of ifelse is quite simple
Usage
ifelse(test, yes, no)
Arguments
test
an object which can be coerced to logical mode.
yes
return values for true elements of test.
no
return values for false elements of tes
DECISION STATS 