R Basic

Before executing an operation on an object, it is advisable to check its length, as this helps prevent potential errors. Some operations require an object to be of the same length. It ensures that an object has the expected number of elements. The length() function is used to set or get the length of vectors … Read more

Rounding is a process of approximating a number to a shorter, simpler, and more interpretable value while retaining its closeness to the original value. For example, if you are working in the finance division, you often publish a research report on the economy, where numbers in reports often round to 2 decimal points. Here are … Read more

For string operations like comparing strings, data standardization, formatting output, or input validation, we may want to convert the input to uppercase (or lowercase, depending on the situation) to ensure consistency and prevent errors caused by inconsistent capitalization. The toupper() function converts a string to an upper case. It accepts an input string and converts … Read more

The names() function in R gets or sets the names of objects such as vectors, lists, or data frames. If you are using it to fetch the name, it will return a character vector containing the names assigned to its elements or columns. Syntax names(obj) # To get names names(obj) <- value # To set names Parameters Name Value … Read more

When you convert a list to a matrix, you are essentially taking the elements of a list and rearranging them into a two-dimensional structure with rows and columns. To convert a list to the matrix in R, use the matrix() function and pass the unlist() function as an argument. The unlist() function flattens a list into a … Read more

If you are working with multidimensional data in R, you should explore Arrays. Arrays are designed to store data in more than two dimensions and represent complex data structures. The as.array() function attempts to coerce the input object into an array structure. It handles various input types, including vectors, lists, data frames, etc. Syntax as.array(input_obj, … Read more

The fastest and easiest way to convert a list to a data frame in R is to use the “as.data.frame()” function. It checks whether an input object is a data frame and, if not, tries to convert it. main_list <- list( col1 = c(1, 2, 3), col2 = c(4, 5, 6), col3 = c(7, 8, 9) … Read more

Here are three ways to create an empty list in R: Using list() Using vector() Assigning NULL to empty an existing list An empty list means it does not contain any elements. An empty list and NULL have a key difference. An empty list means there is a list object with 0 elements, and a … Read more

The is.array() is a built-in R function that checks whether an input object is an array. It returns TRUE if it is an array and FALSE otherwise. Syntax is.array(obj) Parameters Name Value obj It is an input object that will be checked for an array object. Visual representation Checking for an array object # Creating … Read more

The as.vector() function converts an input R object into a vector. The object can be anything like a matrix, array, or factor. The return value is a vector. When you convert the matrix to a vector, it will remove the attributes, such as dimension, to transform into a vector. When you convert a factor to … Read more