Mean of one column with respect to another

Question

Hi!!

I am new to R and I want to know how to find out the mean of one column with respect to other.

Can someone explain in simple terms?

Answer 1

Consider the inbuilt iris dataset in R.

Use the mean() function from the mosaic package.

mean(iris$Sepal.Length~iris$Species)

This command gives the mean values of Sepal-Length across different species of the iris flower.

And, when you run this command, you will see in the output that “virginica” has the highest sepal length and “setosa” has the lowest sepal length.