To get a last value of a vector in R, you can use the length() function to get the index of the last element. # Define the vector main_vector <- c(11, 21, 18, 46, 19) # Access the last value of the vector last_element <- main_vector[length(main_vector)] # Print the last value print(last_element) Output [1] 19 … Read more
To remove multiple elements from a list in R: Method 1: Using the negative indexing Method 2: Using Filter and %in% operator Method 3: Using lapply and sapply with != operator Method 1: Using negative indexing To remove multiple elements by their positions in the list, you can use negative indexing. For example, to remove … Read more
There are three methods to remove an element from a list in R. Method 1: Using the negative indexing You can use negative indexing to remove an element at a specific position from the list in R. For example, remove the second element from the main_list using the main_list[–2] expression. main_list <- list(“bmw”, “audi”, “benley”, … Read more
The any() is a built-in R logical function that tests whether at least one element in a given logical vector is TRUE. It returns a single logical value: TRUE if at least one element is TRUE, and FALSE if all elements are FALSE. Syntax any(x, na.rm = FALSE) Parameter values x: A logical vector or … Read more
The is.element() is a built-in R function that checks if one or more elements are present in a given vector. The function returns a logical vector of the same length as the first input, with each element set to TRUE if the corresponding element is found in the second input and FALSE otherwise. Syntax is.element(element, … Read more
To unload a package without restarting in R, you can use the detach() function with unload argument set to TRUE. The detach() function takes the arguments package:<package_name> and the unload argument TRUE to ensure the package is fully unloaded. library(ggplot2) # Unload ggplot2 package detach(package:ggplot2, unload=TRUE) First, we loaded the ggplot2 package using the library() function and then … Read more
To find out which package version is loaded in R, you can use the sessionInfo() or the packageVersion() function. To check the version of all currently loaded packages, you can use the sessionInfo() function, which provides information about your current R session, including package versions. # Get information about the current R session session_info <- sessionInfo() … Read more
To concatenate strings in R, you can use the paste() function to take multiple strings as an input, combine them, and return a concatenated string as an output. The syntax is paste(…, sep = “”, collapse = NULL), where … are the strings to be concatenated, sep is the separator to be inserted between each … Read more
There are the following methods to check if characters are present in the string in R. Method 1: Using the grepl() function Method 2: Using str_detect() function from the stringr package. Method 1: Using the grepl() function You can use the grepl() function to check if characters are present in the string in R. It returns … Read more
The as.double() function in R converts an integer to a double class. Syntax as.double(x, …) Parameters x: It is an object to be coerced or tested. …: further arguments passed to or from other methods. Example x <- 1:5 y <- as.double(x) y typeof(y) Output [1] 1 2 3 4 5 [1] “double” You can … Read more