thinQmaster Virtual testing partner Adaptive practice exams that find your weak spots and drill them. Every answer explained. From $69
Enroll

thinQmaster

Find your exam

Five questions free, before you decide.

Step 1 · choose a vendor

In one of our camps? Your practice exams come with the tuition — they are on your study page already.

Data & Analytics · Intermediate

Tidy Data

Hadley Wickham's data structure principle: each variable is a column, each observation is a row and each type of observational unit is a table.

Definition

Tidy data simplifies manipulation, visualization and modeling in tools such as R's tidyverse and pandas.

Exam tip

Values stored in column headers (such as years) violate tidy principles.

Related terms