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R Introduction: Part I

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Numbers

In the previous section, we observed that the number 10 was identified as a double even though it is an integer. Let's delve into this peculiarity.

R can categorize numeric values into several types, which are:

  • double - representing real numbers;

  • integer - for whole numbers;

  • complex - for numbers with both a real and an imaginary part.

To have R recognize 10 as an integer instead of a double, you can append L to the number. Here’s how you can do it:


              
12

            
typeof(10) # Example of double type
typeof(10L) # Example of integer type
copy

Differentiating between 10 and 10L is important because of how memory is utilized — integers take up less space.

Opgave

Swipe to start coding

  1. Assign the current year's numerical value to a variable named year, and ensure that it is of integer type by appending L.

  2. Determine and display the type of the year variable:

Løsning

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Sektion 2. Kapitel 2

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book
Numbers

In the previous section, we observed that the number 10 was identified as a double even though it is an integer. Let's delve into this peculiarity.

R can categorize numeric values into several types, which are:

  • double - representing real numbers;

  • integer - for whole numbers;

  • complex - for numbers with both a real and an imaginary part.

To have R recognize 10 as an integer instead of a double, you can append L to the number. Here’s how you can do it:


              
12

            
typeof(10) # Example of double type
typeof(10L) # Example of integer type
copy

Differentiating between 10 and 10L is important because of how memory is utilized — integers take up less space.

Opgave

Swipe to start coding

  1. Assign the current year's numerical value to a variable named year, and ensure that it is of integer type by appending L.

  2. Determine and display the type of the year variable:

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 2
Switch to desktopSkift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder
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