R设定年龄范围？

Question

I want to subset a data frame by age group.

Only those obs where:

age > 35 and age < 80

My attempts didn't give what I wanted.

It gave me rows below 35 and above 80 for age.

subset(data,age > 35 & age < 80,select = myvar)

I tried && , but that didn't work either.

Does this have to be done in two steps?

Answer 1

You don't need to use subset() try something like this:

person <- c("John", "Jane", "Bill", "Betty", "Cindy")
age <- c(10, 40, 50, 90, 100)
data <- data.frame(person, age)
age35_80 <- data[data$age > 35 & data$age < 80,]

Only need to use a single & to vectorize.