R Advanced

If you want to put data validation in progress, you must identify the file type or “MIME Type” before processing. To identify the file type, we might need to check its extension. Here are two ways to get an extension of a file in R: Using the tools::file_ext() Using regular expression Method 1: Using the … Read more

To check if a file is empty in R, you can use either the “file.info()’s size attribute” or the “file.size()” function. We must check if a file is empty to save our resources from reading or processing. It helps us put a data validation that will prevent unexpected results or errors. Based on its emptiness, … Read more

The is.na() function checks for missing values (NA) in the R object. It returns TRUE for NA values and FALSE otherwise. The valid object can be anything like a data frame, matrix, list, or vector. It is extremely helpful in data cleaning and preparation, as it helps identify and handle missing values in a dataset. … Read more

Overview The easiest way to calculate the natural log of a number or vector in R is to use the built-in log() function. The natural log uses “e” as its base, whereas log10 uses 10. The “e” is Euler’s number, whose value is approximately 2.718. In R, the formula for the natural log is ln(x) … Read more

The dirname() function in R is used to extract the path to the directory from a full file path. Essentially, it returns the directory part of a file path, excluding the file name. This function is often used in conjunction with other file-handling functions like basename() (which extracts the file name) and file.path() (for constructing … Read more

The seq_along() function in R is used to generate a sequence of integers along the length of its argument. Syntax seq_along(len) Parameters len: It takes a length as an argument. Return value It returns an integer vector unless it is a long vector when it will be double. Example 1: Basic usage of seq_along() seq_along(LETTERS[1:5]) … Read more