Learning R Programming

Lists

A list is a generic vector that is allowed to include different types of objects, even other lists.

It is useful for its flexibility. For example, the result of a linear model fit in R is basically a list object that contains rich results of a linear regression such as linear coefficients (numeric vectors), residuals (numeric vectors), QR decomposition (a list containing a matrix and other objects), and so on.

It is very handy to extract the information without calling different functions each time because these results are all packed into a list.

Creating a list

We can use list() to create a list, as the function name suggests. Different types of objects can be put into one list. For example, the following code creates a list that contains ...