Histogram

Histogram [ˈhɪs.tə.ɡræm]: A visual representation of a distribution of data that is divided into intervals. For each interval the amount of values that belong to it are counted and then represented by the interval’s column’s area.

In most cases, the intervals will be of

The same dataset visualised in histograms with equal sized and differently sized intervals, respectively.

The same dataset visualised in histograms with equally sized and differently sized intervals, respectively.

equal size, so the columns’ height will be proportional to the frequency of values in each interval. It is also possible to use differently sized intervals. However, since the area is scaled – not the height, like in bar charts – these histograms are not as easy to read and therefore used less often.

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