How do you divide data into two groups in R?

In R programming, data can be divided into two groups using conditional statements. For instance, the ifelse function can be used to categorize data based on a certain condition.

Suppose there is a vector x containing numbers, and we want to separate the numbers greater than 5 into one group and the numbers less than or equal to 5 into another group. This can be achieved using the following code:

x <- c(2, 5, 8, 3, 7, 1)
group1 <- x[x > 5]
group2 <- x[x <= 5]

In the code above, x[x > 5] represents selecting numbers in x that are greater than 5, and storing them in group1; x[x <= 5] represents selecting numbers in x that are less than or equal to 5, and storing them in group2.

Additionally, you can use the subset function to filter data based on certain conditions, for example:

group1 <- subset(x, x > 5)
group2 <- subset(x, x <= 5)

In this way, the data can be divided into two groups based on certain conditions.