Kursinnehåll
R Introduction: Part I
R Introduction: Part I
Vectors
It's time to explore how to store multiple values within a single variable, which can be efficiently done using vectors.
It's essential to understand that a vector must contain data of the same type; this means you cannot mix integers, complex numbers, and logical values in a single vector.
Creating a vector in R is straightforward: just list all the values separated by commas inside the c() function. Here's how you do it:
vec <- c(1, 2, 3) # Create a vector vec # Output its value
When you input different data types within the c() function, R will default to one type for all elements. For instance, in a vector like c(1, 2, 'some text'), all numeric values will be converted to text. The reasoning is straightforward: if you attempt to construct a vector with varying types, R will select the one type to which all values can be converted.
Swipe to start coding
Now, let's examine which types will be adopted when a vector consists of different data types.
- Display the vector containing the elements
0,10.5, and20, in that specific order. - Display the vector containing the elements
1,2.5, and5 + 10i, in that order. - Display the vector containing the elements
2.5,TRUE, and5, in that order. - Display the vector containing the elements
FALSE,25.5, and'R', in that order.
Lösning
Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedanTack för dina kommentarer!
Vectors
It's time to explore how to store multiple values within a single variable, which can be efficiently done using vectors.
It's essential to understand that a vector must contain data of the same type; this means you cannot mix integers, complex numbers, and logical values in a single vector.
Creating a vector in R is straightforward: just list all the values separated by commas inside the c() function. Here's how you do it:
vec <- c(1, 2, 3) # Create a vector vec # Output its value
When you input different data types within the c() function, R will default to one type for all elements. For instance, in a vector like c(1, 2, 'some text'), all numeric values will be converted to text. The reasoning is straightforward: if you attempt to construct a vector with varying types, R will select the one type to which all values can be converted.
Swipe to start coding
Now, let's examine which types will be adopted when a vector consists of different data types.
- Display the vector containing the elements
0,10.5, and20, in that specific order. - Display the vector containing the elements
1,2.5, and5 + 10i, in that order. - Display the vector containing the elements
2.5,TRUE, and5, in that order. - Display the vector containing the elements
FALSE,25.5, and'R', in that order.
Lösning
Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedanTack för dina kommentarer!
Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan