Vector Is Not a Data Type
Q
Is Vector a Data Type?
✍: FYIcenter.com
A
No. Technically, "Vector" is not a data type.
In R, all data items are technically "vectors".
In other words, everything is a vector in R. There is no "scalar" data. This is why data "3" is printed out as "[1] 3" on the console, indicating that "3" is a vector of 1 member:
> 3 [1] 3
The following two data items, 3 and c(3), have the same data type, a single-component "double":
> i = 3 > i [1] 3 > typeof(i) [1] "double" > i == 3 [1] TRUE > is.vector(i) [1] TRUE > j = c(3) > j [1] 3 > typeof(j) [1] "double" > j == 3 [1] TRUE > is.vector(j) [1] TRUE
Also note that v[i] returns a single-component vector.
> v = c("Apple", "Banana", "Orange")
> v[2]
[1] "Banana"
> is.vector(v[2])
[1] TRUE
> typeof(v[2])
[1] "character"
> v2 = v[2]
> v2[1]
[1] "Banana"
2023-06-11, ∼1561🔥, 0💬
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