Showing Breakdowns of the Whole

Question 1

What are some bad ways to use a pie chart?

Answer 1

Using too many slices, or trying to compare between slices that are too similarly-sized

Question 2

When is a pie chart a good fit?

Answer 2

When the user needs to make high-level comparisons, such as “these two groups are pretty similar”, or “this group makes up the majority”

Question 3

What parts of the marks card do you use to make a pie chart?

Answer 3

Angle and Color

Question 4

As a best practice, how many categories can a pie chart fit effectively?

Answer 4

2 to 5

Question 5

What is a tree map?

Answer 5

A viz that uses nested rectangles to show hierarchical data as a part of the whole

Question 6

What items do you need to drag to which parts of the view to create a tree map?

Answer 6

Drag one measure to Color and Size on the Marks card and one dimension to Detail on the Marks card

Question 7

How do labels work with tree maps?

Answer 7

They are only shown on the larger rectangles so that they do not overlap - label data for the smaller rectangles can be found in the tooltip

Question 8

What information is included in the tooltip?

Answer 8

Both information that is already in the view and information that is not included in the view

Question 9

How are tree maps organized?

Answer 9

Colors are grouped together and ordered with the largest value at the top left and the smallest at the bottom right, and items within each color are also ordered with the largest value at the top left

Question 10

Within each existing single color section of a tree map, what can you do to show additional detail besides adding things into the label or tooltip?

Answer 10

You can add a second color that will create shades of the first color based on another dimension by dragging another dimension to Detail, then selecting color in the dropdown menu to the left of the field name in the Marks card

Question 11

Visual best practice limits the number of colors in any view to ______

Answer 11

7

Question 12

How do you build a word cloud from a tree map?

Answer 12

Change mark type to text

Question 13

The words shown are in what part of the Marks card for a word cloud?

Answer 13

Label

Question 14

How do you build a bubble chart from a tree map?

Answer 14

Change mark type to circle

Question 15

After you have an existing tree map, how can you compare your data across another dimension aside from adding a second color?

Answer 15

Add a dimension to Rows to split the tree map into multiple tree maps