R Data Types | R Datatypes List - r - learn r - r programming
- The list is a type of vector in R programming.
- List have different types of element which includes vectors, functions and even another list inside vectors.
- Each element in the list have different class to represent.
- A list allows us to fold a variety of (possibly unconnected) objects under one name.
- Lists are fundamentally different from atomic vectors.
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List methods in PythonSyntax:
list()Sample Code:
x <- list(c(2,4,6),25.01,cos)
print(x)Code Explanation:
- In this example, x is specifying to string variable. Here we use (list(c(2,4,6),25.01,cos) list function which means to create a list.
- Here print() is used to print the value, that value stored in x variable.
Sample Output:
- Here in this output we display first list of x variable i.e., (2,4,6) which specifies to numeric values.
- In this output we display second list of x variable i.e., (25.01) which specifies to numeric value.
- In this output we display third list of x variable i.e., function (x) is string variable and cos is primitive value.
List Elements Manipulation
- We manipulate the list by add,delete and update elements in a list
- We can add and delete elements at the end of a list only but we update any elements ina list.
Sample Code
# Create a list containing a vector, a matrix and a list.
list_data <- list(c("Jan","Feb","Mar"), matrix(c(8,4,4,3,-6,9), nrow = 2),
list("green",12.3))
# Give names to the elements in the list.
names(list_data) <- c("Vectors", "Matrices", "Lists")
# Add element to the list.
list_data[5] <- "New element"
print(list_data[5])
# Remove the element.
list_data[5] <- NULL
# Print the 4th Element.
print(list_data[5])
# Update the 2rd Element.
list_data[2] <- "updated element"
print(list_data[2])Output
[[1]]
[1] "New element"
$<NA>
NULL
$`A Inner list`
[1] "updated element"