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What is a Vector?

If you are familiar with any other programming language, you may superficially guess what vector is. In simple wording, it's like an array in which you can store multiple values. But why should we start learning data types with arrays straightaway?

The answer is simple - even simple numbers (real, integer, complex), a text string is also considered as a vector, having the length of 1. So let's stop with the single-element vectors. What types are available in R? These are:

  • logical - storing logical values TRUE/T and FALSE/F.

  • numeric/double - consists of real numbers.

  • integer - consists of integer numbers.

  • complex - consists of complex numbers.

  • character - consists of characters (text).

To check the type of a specific variable, you need to use the typeof() function, passing the necessary variable as a parameter. For example,

12
test = TRUE typeof(test)
copy

The output of the script above is:

python

Practice using this function by yourself!

Opgave

Swipe to start coding

  1. Assign value 10 to variable chapter.
  2. Output the type of the variable chapter.

Løsning

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Var alt klart?

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Sektion 2. Kapitel 1
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book
What is a Vector?

If you are familiar with any other programming language, you may superficially guess what vector is. In simple wording, it's like an array in which you can store multiple values. But why should we start learning data types with arrays straightaway?

The answer is simple - even simple numbers (real, integer, complex), a text string is also considered as a vector, having the length of 1. So let's stop with the single-element vectors. What types are available in R? These are:

  • logical - storing logical values TRUE/T and FALSE/F.

  • numeric/double - consists of real numbers.

  • integer - consists of integer numbers.

  • complex - consists of complex numbers.

  • character - consists of characters (text).

To check the type of a specific variable, you need to use the typeof() function, passing the necessary variable as a parameter. For example,

12
test = TRUE typeof(test)
copy

The output of the script above is:

python

Practice using this function by yourself!

Opgave

Swipe to start coding

  1. Assign value 10 to variable chapter.
  2. Output the type of the variable chapter.

Løsning

Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
Var alt klart?

Hvordan kan vi forbedre det?

Tak for dine kommentarer!

Sektion 2. Kapitel 1
Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
Vi beklager, at noget gik galt. Hvad skete der?
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