Data Structure

Data Structure - Factor

Q

What is a Factor?

✍: FYIcenter.com

A

A factor is a data structure that stores a vector and its distinct values as categories.

1. Create a factor object with the factor() function -

> f = factor( c("Bike", "Car", "Truck", "Car", "Bike", "Truck") )

> f
[1] Bike  Car   Truck Car   Bike  Truck
Levels: Bike Car Truck

> typeof(f)
[1] "integer"

> is.factor(f)
[1] TRUE

2. Get factor length and members -

> f = factor( c("Bike", "Car", "Truck", "Car", "Bike", "Truck") )

> length(f)
[1] 6

> f[4]
[1] Car
Levels: Bike Car Truck

⇒ Data Structure - Matrix

⇐ Data Structure - List

⇑ R Language Basics

⇑⇑ R Software Environment - Frequently Asked Questions

2023-05-31, ∼1445🔥, 0💬

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Data Structure - List
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Data Structure - Matrix
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Data Structure - Factor
What is a Factor? A factor is a data structure that stores a vector and its distinct values as categories. 1. Create a factor object with the factor() function - > f = factor( c("Bike", "Car", "Truck", "Car", "Bike", "Truck") ) > f [1] Bike Car Truck Car Bike Truck Levels: Bike Car Tru... 2023-05-31, ∼1446🔥, 0💬

Vector Is Not a Data Type
Is Vector a Data Type? 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: &am... 2023-06-11, ∼1432🔥, 0💬

Data Structure - Data Frame
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Basic Data Types
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