Spaghetti Plot

The purpose of the spaghetti plot is to present the trajectory or trend of data. This display can take the form of a graph or a figure, depending on the data. Numerous long lines that curve and intersect give the appearance of noodles, hence the name, spaghetti plot. Typically, whether data are to be presented over time or over space (such as in a map) will determine whether the spaghetti plot takes the form of a graph or a figure. A graph displays individual responses over time for psychological or physiological (interval or ratio) variables. In a figure, the physical path of the variable of interest is important to display to provide an indication of how the variable’s path changes through space. This entry explains ...

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