R

The match() function returns the position of the first match between two R objects. You can use the %in% operator to know only whether the value has been matched. match in R The match() is a built-in R function that returns a vector of (first) matches of its first argument in its second argument. The … Read more

The table() function uses the cross-classifying factors to build a contingency table of the counts at each combination of factor levels. The table() method creates a categorical representation of data with the variable names and the frequency in a table. Contingency Table in R The contingency table is a built-in data structure used to redraw … Read more

To check if a file exists is a very useful operation before reading it in to avoid an error. To know your active directory in R, use the getwd() command. getwd() The getwd() function returns an absolute filepath representing the current working directory of the R process. Checking If a file or folder exists in … Read more

When it comes to appending data frames, the rbind() and cbind() function comes to mind because they can concatenate the data frames horizontally and vertically. In this example, we will see how to use the rbind() function to append data frames. Append Data Frames in R To append data frames in R, use the rbind() … Read more

R has several built-in constants like letters, LETTERS, or month.abb, etc. A constant in a programming language is a value that cannot be changed by the program during its execution. LETTERS in R To create a sequential uppercase alphabet in R, use the LETTERS constant.  The LETTERS is a character constant in R that generates an … Read more

There are a few characters “constants” in R and Pi is one of the most used mathematics constants. What is Pi in Mathematics The pi, which is written as the Greek letter for p or π, is the ratio of the circumference of any circle to the diameter of that circle. The circumference of a … Read more

To retrieve or replace a character string substring in R, use the substr() method. To extract the substring of the column in R,  use the functions like substr() and substring(). substr() in R The substr() is a built-in R method that returns the substrings of a character vector. It extracts or replaces substrings in a … Read more

The sum() method helps find the sum of a group, the sum of a specific column of a data frame. The sum() method returns the sum of all the elements present in its arguments. If it is a vector, then it will return the sum of all vector elements. Sum in R The sum() is … Read more

To generate a sequence of numbers in R, use the seq() method. These are various versions of the seq() function in R. The seq() is a standard general with a default method to generate the sequence of numbers. seq() in R The seq() is a built-in R method that generates the regular sequences. The seq.int() … Read more

Data cleaning is one of the toughest tasks of a data scientist. To accurately analyze the data set, we often remove duplicates based on certain conditions like column values. In this tutorial, we will see how to remove duplicate data based on column values and the different ways to do it efficiently. Remove duplicates in … Read more