Linear Regression in R: Relating Computing to Statistical Analysis

linear regression in rLinear regression is a tool used in statistics to predict the value of a variable based on the value of another variable. When a causal relationship between variables exists, the value of one variable influences the value of another variable. The influenced variable is referred to as the dependent variable, as its value depends on the value of the influencing variable, which is also known as the independent variable. In R programming, several functions exist that are devoted specifically to regression analysis.

You can learn how to use R for regression analysis and general statistical computing on Udemy with a wide variety of courses that teach everything from the basics to more advanced techniques. These courses are perfect for anyone who wants to learn the fundamentals of R programming and boost their data analysis and programming abilities. Check out Udemy’s Learn R By Doing course to learn additional R programming operations.

R Programming

R programming  is widely used by statisticians and data miners, but it can be a valuable tool for anyone interested in data analysis and/or data visualization. It is a modernized implementation of the S programming language, which was primarily developed by John Chambers, Rick Becker, and Allan Wilks of Bell Laboratories. The R programming language, on the other hand, was written by Robert Gentleman and Ross Ihaka, but it has been developed largely as the result of the efforts of contributors throughout the world.

R uses a command line interface, which means that the interaction between the user and R solely consists of textual input and output. This is the case with many programming languages, so learning the fundamentals of this type of interaction with a computer is a valuable skill. However, R offers several graphical user interfaces as well, so that is an option for someone who prefers graphical interfaces over command line interfaces.

You can learn R basics, such as input and output methods, by taking Udemy’s Data Analysis in R course. This course also includes instructions for more extensive functions in R, and, by the time the course is completed, the user will be able to produce graphs and will understand many R programming concepts, such as loops and conditional statements. Additionally, Udemy’s R Tutorial: Intro to Loops (While, For Repeat, Apply, etc!) blog post explains several fundamentals of R. Some of these fundamentals, such as utilizing loops and debugging errors, apply to other programming languages as well, so they are especially good skills to learn for anyone who may need to learn multiple programming languages.

Once you have learned the fundamentals of R programming, you can learn how to model the relationship between two variables by using linear regression in R. This will enable you to plot a set of X-values and Y-values and observe the relationship between the two. When you do this, a linear regression line is generated; this is what visually depicts the relationship between the two variables.

The linear regression line has two defining elements: slope and intercept. The line has the equation Y = a + bX. In this equation, X is the explanatory variable and Y is the dependent variable. The slope of the line is b and the intercept is a.

By using R programming, you can input your data and create a linear regression line using that data. Udemy’s courses on R programming make the connection between statistical data and programming.

By using R, a person can easily manipulate data, make calculations, and implement statistical techniques. For example, some of the statistical techniques in R include linear modeling, clustering, time-series analysis and more.

However, R programming is not only a valuable tool for statisticians and data analysts; it can produce valuable information for product managers, brand managers, and market researchers as well. For example, R can be used to predict customer behavior and purchase patterns. Being able to make these types of predictions is an important skill in business, and can give a company a major competitive edge in their industry. Udemy’s Customer Choice Modeling With R course teaches the necessary R programming skills to enable a user to understand their customers’ choices and make good business decisions based on the received data.

It should also be noted that R is a GNU project that has been made available as free software. In this case, the term “free software” does not necessarily mean that the software has no financial cost; it means that the software user can control, change, and improve, and freely distribute the software. A user can even distribute the software after they have made improvements to it. Four basic requirements must be met in order for software to be considered “free.” These requirements are:

  • The user of the software must be able to run the software for whatever purpose they desire.
  • The user must be able to observe and learn about how the program works and change/improve the software based on the knowledge they have acquired.
  • The user must be able to distribute copies of the software.
  • The user must be able to distribute their changed/improved versions to others.

These freedoms can be beneficial to the entire programming community because redistributing an improved version of software promotes innovation and ensures that the highest level of software quality is being provided to the user.

While the idea of learning a new programming language may seem overwhelming for beginners, Udemy courses such as Introduction to R make learning easy. By taking these courses, you will familiarize yourself with a valuable skill and programming language, and you will learn how to generate a linear regression line to show the relationship between two variables. R is one of the most popular analytical tools available, and is widely used by many major companies for data analysis and management. By learning R, you can become a better coder and give yourself a major advantage on the job market as well as in the working world. Take a course online at Udemy, and take your data analysis and computing skills to a new level.