Data arrangement - help to beginner

[domvilla]

Hello everyone,

I have a quizz on data panel and I'm stuck on some data arrangement basics.
I have a data set that contains the variables' income, time period and age of individuals. My question is: How can I create a new variable that groups by the same age the observations? For example if there are 50 ages and 10,000 observations: how can I work with the income of the individuals divided by their ages

Thank you very much!

[williaml]

Probably something with group_by but hard to tell what exactly without an example.

Group by one or more variables — group_by

Can you provide a reproducible example?

FAQ: How to do a minimal reproducible example ( reprex ) for beginners

A minimal reproducible example consists of the following items: A minimal dataset, necessary to reproduce the issue The minimal runnable code necessary to reproduce the issue, which can be run on the given dataset, and including the necessary information on the used packages. Let's quickly go over each one of these with examples: Minimal Dataset (Sample Data) You need to provide a data frame that is small enough to be (reasonably) pasted on a post, but big enough to reproduce your issue. Let's say, as an example, that you are working with the iris data frame head(iris) #> Sepal.Length Sepal.Width Petal.Length Petal.Width Species #> 1 5.1 3.5 1.4 0.…