Data Structure - Vector
Q
What is data structure "Vector"?
✍: FYIcenter.com
A
Vector is a special data structure that
represents a sequence of data elements of the same data type.
A vector is an array in many other programming language.
1. Create a vector object with the c() function -
> v = c("Apple", "Banana", "Orange")
> print(v)
[1] "Apple" "Banana" "Orange"
> is.vector(v)
[1] TRUE
2. Get vector length and members - Remember that member indexes start from 1.
> v = c("Apple", "Banana", "Orange")
> length(v)
[1] 3
> v[1]
[1] "Apple"
3. Get a sub-set of a vector -
> v = c("Apple", "Banana", "Orange")
> v[2:3] # specifies a range
[1] "Banana" "Orange"
> v[-2] # specifies the end backward
[1] "Apple" "Orange"
> v[ c(2,3,2,3) ] # specifies a list of members
[1] "Banana" "Orange" "Banana" "Orange"
2023-06-11, ∼1688🔥, 0💬
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