Name: Achmad Fahry Baihaki
NIM: 2206065110100
Institute: Maulana Malik Ibrahim Islamic State University of Malang
Departement: Computer Science
Lecturer: Prof. Dr. Suhartono, M.Kom


Vector

Vector is a combination of different values (numeric, character, logical, etc depending on the input data types) in the same object/variable.

In the following case study, the reader has the appropriate input data types, namely numeric vectors, character vectors, logical vectors, and so on.

Creating a Vector

Vector in RStudio can made using c() function (concatenate). Here’s the example: 

# Create Numeric Vector
a <- c(9, 10, 2 , 7)

# Print the vector
a
## [1]  9 10  2  7
# Create Character Vector 
b <- c("Cockroach", "Ant", "Mosquito", "Bee")

# Print the vector
b
## [1] "Cockroach" "Ant"       "Mosquito"  "Bee"

In addition to entering values for the vectors, we can also use the names() function to provide a value name for each vector.

# Creates a vector with the number of fruits purchased

fruitValues <- c(10, 15, 20, 8)
names(fruitValues) <- c("Orange", "Watermelon", "Kiwi", "Guava")

# Or we can type like this
fruitValues <- c(Orange=10, Watermelon=15, Kiwi=20, Guava=8)

# Print
fruitValues
##     Orange Watermelon       Kiwi      Guava 
##         10         15         20          8
NOTES:

Vectors can contain only one data type. Vectors can contain only numeric data types, only characters, and so on.

To find the length of a vector, we can use length() function. Here’s the example: 

# Find the length of fruitValues
length(fruitValues)
## [1] 4