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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HTML

HTML [eɪtʃ tiː ɛm ɛl]: short for HyperText Markup Language. This language is used to build the basic structure of a website.

HTML is a type of XML (Extensible Markup Language), which is generally used to store data, like text and metadata, in a structured way.

You can read up on HTML in our tutorial on the basics of web development or on a reference site like W3schools or the Mozilla Developer Network.

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