CSE 6040 - 7.0 - Tidy Data Concepts

Question 1

What is Tidy Data?

A variable forms a what?

Each observation forms a what?

Each observational unit forms a what?

Answer 1

Tidy data is standard way of mapping the meaning of a datset to its structure. In tidy data

1. Each variable forms a column.
2. Each observation forms a row.
3. Each type of observational unit forms a table

Question 2

A Data Frame representation is better suited for __________.

Answer 2

A Data Frame representation is better suited for regression.

Question 3

Wickham defines a tidy data set as one that can be organized into a 2-D table such that

each column represents a variable;

each row represents an observation;

each entry of the table represents a single value, which may come from either _______(discrete) or ________spaces.

Answer 3

Wickham defines a tidy data set as one that can be organized into a 2-D table such that

each column represents a variable;

each row represents an observation;

each entry of the table represents a single value, which may come from either categorical (discrete) or continuous spaces.

Question 4

If a table is tidy, we will call it a ___ __ or _______, for short.

Answer 4

If a table is tidy, we will call it a tidy table, or tibble, for short.

Question 5

Identify how a computer scientist with machine learning outlook might refer to to this picture.

Answer 5

Columns as features

rows as data points

especially when all values are numerical (ordinal or continuous)