Graphics Reference
In-Depth Information
Image from "The Sexperience 1000" (
http://sexperienceuk.channel4.com/
the-sexperience-1000
), created by Channel 4/Mint Digital
Histogram
Data variables
: 1 x quantitative-interval, 1 x quantitative-ratio.
Visual variables
: Height, width.
Description
: Histograms are often mistaken for bar charts but there are important
differences. Histograms show distribution through the frequency of quantitative
values (y axis) against defined intervals of quantitative values(x axis). By contrast, bar
charts facilitate comparison of categorical values. One of the distinguishing features of
a histogram is the lack of gaps between the bars, as shown in the following image:
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