R Extract Even Numbers: Vector Tutorial

In order to extract even numbers from a vector, you can use logical operators and vector indexing in the R language.

Here is an example code demonstrating how to extract all even numbers from a vector.

# 创建一个示例向量
vec <- c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)

# 使用逻辑运算符判断是否为偶数
even <- vec %% 2 == 0

# 使用逻辑向量作为索引提取偶数
even_numbers <- vec[even]

print(even_numbers)

Running the above code will result in:

[1]  2  4  6  8 10

Extract all even numbers from the vector by using the logical operator %% 2 == 0 to determine if elements are even and use the resulting logical vector as an index.