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Tech 136,976 A Histogram is NOT a Bar Chart A reader need go no further than page two of Leland Wilkinson ’s The Grammar of Graphics before reading, “We will also come to realize why a histogram is not a bar chart and why many other graphics that look similar have very different grammars.” The figures below show an example of a histogram and a bar chart. Histograms are used to show distributions of variables while bar charts are used to compare variables. Histograms plot quantitative data with ranges of the data grouped into bins or intervals while bar charts plot categorical data. This post expands on these differences and mentions several other differences between histograms and bar charts. This content can’t be shown in a frame
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Figure 1. A histogram showing the distribution of times visitors spent at one museum exhibition. Notice that the horizontal axis of Figure 1 consists of binned times: the first bin Photos: The Richest Person In Every State Six Months, No Interviews -- Until I Started Breaking The Rules
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