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Which is more useful a point plot or bar plot?


Asked by Jaxton Ware on Dec 09, 2021 FAQ



Point plots can be more useful than bar plots for focusing comparisons between different levels of one or more categorical variables. They are particularly adept at showing interactions: how the relationship between levels of one categorical variable changes across levels of a second categorical variable.
In respect to this,
A bar plot is a plot that presents categorical data with rectangular bars with lengths proportional to the values that they represent. A bar plot shows comparisons among discrete categories.
Furthermore, A bar plot or bar chart is a graph that represents the category of data with rectangular bars with lengths and heights that is proportional to the values which they represent. The bar plots can be plotted horizontally or vertically. A bar chart describes the comparisons between the discrete categories.
Subsequently,
A bar chart describes the comparisons between the discrete categories. One of the axis of the plot represents the specific categories being compared, while the other axis represents the measured values corresponding to those categories.
Additionally,
Bar plots can be wasteful as each data point is repeated several times: To this end, Tufte defines the data ink ratio as: The heuristic is to maximize this ratio as far as possible by using the ink (pixels) for only the data. Rather use a table than a bar plot for a handful of data points.