Linear regression in R for busy developers

(Sometimes simple model like linear regression can also win the war of machine learning algorithm)

linear regression

Since the title speaks for busy developers, I don’t want to write any boring introduction. Fire up your Rstudio and let’s get started.

Download dataset from here

Step 1: Load the dataset

Step 2: Create a linear model

Assumption:

BMI(independent variable): Body mass index

charges(dependent variable): Charges depend on BMI

(Note: this is only my assumption for this article that charges are dependent on BMI.)

building a linear model

Step 3: Visualize what you did

Execute the following code to visualize your plot:

plot(select_dataframe, col="blue")

plotting charges vs bmi

Cool! Now let’s draw that regression line we were waiting for. Execute the following command to draw a linear line above the graph shown above.