R中的整数与数字数据类型

Question

This is a question I had while going through R programming course from Coursera. I had asked this question in their forums, but didn't get any answer.

所以我想，我应该在这里问一下。

正如我明白教授所讲的在讲座 - 默认情况下，当我们在变量，存储任何数值如下图所示

x <- 1 
x 

# prints numeric 
class(x) 

但为什么，当我们存储载体，诸如下面所示（注：仍然没有“L”标志，以迫使它作为一个整数）

x <- 1:10 
x 

# prints "integer", but why? 
class(x) 

我认为应该给我一个数字矢量，但事实并非如此。

任何人都可以请解释这里发生了什么吗？

Answer 1

这个已经讨论过，看到http://r.789695.n4.nabble.com/Integer-vs-numeric-td847329.html 从help(":")

 
Value: 

    For numeric arguments, a numeric vector. This will be of type 
    'integer' if 'from' is integer-valued and the result is 
    representable in the R integer type, otherwise of type '"double"' 
    (aka 'mode' '"numeric"').