The R language uses the DOTPLOT function of epidisplay package to visualize the frequency of data points in different intervals in the form of point graph, uses the by parameter to specify the groupin

R Language use epiDisplay Bag dotplot Function to visualize the frequency of data points in different intervals in the form of point graph 、 Use by Parameter specifies the grouping parameter to visualize the point graph distribution of different groups 、 Use cex.main Parameter specifies the size of the visual image title text font

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