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Data Structure - Vector
What is data structure "Vector"?
✍: FYIcenter.com
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, 327🔥, 0💬
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