« Aesthetics and function | Main | Boxplot as gridlines »

Comments

paul

The second chart certainly confused me when I read it in the paper ... I don't understand why the first two bubbles overlap.

Overlapping bubbles, to me at least, indicate that the set of people who get $70k overlaps with the set of people who get $140k. And yet there seems to be a hard break defining who gets which payout.

Maybe I'm reading it wrong.

Jett

While the numbers tell you the truth, the bubbles tell you a lie.

The radius is proportional to the value, but the brain perceives primarily the area, pi*r^2, so the lie factor (ratio of apparent effect to actual effect) for the illegal immigrants is (526000^2/22141^2)/(526000/22141) = 23.7

Which is too big

Matt

Regarding the illegal immigrants chart, if you measure the two charts, you'll see that the area is proportional to the value, not the radius.

So, the chart does accurately portray the relationships of the two numbers.

The comments to this entry are closed.

BOOTCAMP SUMMER '19



Link to Principal Analytics Prep

See our curriculum, instructors. Apply.
Kaiser Fung. Business analytics and data visualization expert. Author and Speaker.
Visit my website. Follow my Twitter. See my articles at Daily Beast, 538, HBR.

See my Youtube and Flickr.

Book Blog



Link to junkcharts

Graphics design by Amanda Lee

The Read



Keep in Touch

follow me on Twitter

Residues