R Basic

The append() function in R concatenates values to a vector or list at a specified position. It returns a new object without modifying the original. You can add a single or multiple elements to a vector or list. Syntax append(obj, values, after = length(x)) Parameters Name Value obj It is an original vector or list. … Read more

Here are three major ways to remove the last row from the data frame in R: Using nrow() with negative indexing Using head() Using dplyr::slice() We have already seen how to remove the first row and its use cases. Method 1: Using nrow() with negative indexing To determine the total number of rows, we can … Read more

When we attempt to remove the first row of a data frame, we are essentially selecting all the rows except for the first one. This means we are excluding the first row and retrieving all other rows in the data frame. DataFrames are like tables with rows and columns. To remove rows, you can use … Read more

To grow the list, you can add an element (numeric value, character vectors, other lists, data frames, or functions) at whichever position you like. You can add a single element, multiple elements, or a list as an element. The final way depends on the user’s intention. Here are five ways to append an element to … Read more

In R, unique() and subsetting with !duplicated() are efficient ways to remove duplicates. Duplicate elements in a vector refer to those elements that appear more than once. Duplicates can skew the data analysis and lead to inaccurate results. Removing them leads to more reliable insights. Method 1: Using unique() The unique() function is a one-step, … Read more

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