Semi-logarithmic graph

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Semi-logarithmic graph  (SEMI-LOGARITHMIC graph)


Methods of graphic representation 1 or diagrammatic representation 1 may be used to illustrate an argument. Here the data are represented in a diagram 2, graph 2, figure 2 (cf. 131-3), chart 3 or map 3. In France the word schema is used to denote a diagram which gives a schematic 4 representation of a problem. Where in a diagram one co-ordinate axis is graduated logarithmically and the other arithmetically, the graph is called a semi-logarithmic graph 5, though such graphs are often inaccurately referred to as logarithmic graphs 5. A true logarithmic graph 6 has both axes graduated logarithmically and is sometimes referred to as a double logarithmic graph 6. Frequency distribution may be represented graphically by frequency polygons 7, obtained by joining points representing class frequencies by straight lines, or by histograms 8, where a class frequency is represented by the area of a rectangle with the class interval as its base, or by bar charts 9, in which the class frequencies are proportionate to the length of a bar.
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