![]() A cholesterol level that is 240 or more is considered high. A "borderline" (or moderately elevated) cholesterol level is between 200 and 240 mg/dL. ![]() The reference lines are perpendicular to the axis.Ī simple use of a reference line is to indicate a reference value on a histogram.įor example, a healthy total cholesterol level is less than 200 mg/dL. You then use the AXIS=X or AXIS=Y option to specify which axis the reference lines are for. You can specify one or more values (separated by spaces) or you can specify a variable in the data set that contains the values at which to display the reference lines. ![]() The REFLINE statement in PROC SGPLOT is easy to use. Use reference lines for a categorical variable on a discrete axis.Display a reference line at a value such as a mean or median.This article provides multiple "Getting Started" examples that show how to use the REFLINE statement This article discusses the REFLINE statement in PROC SGPLOT in SAS. ![]() Sometimes you can let the data "speak for themselves" in an unadorned graphic, but sometimes it is helpful to add reference lines to a graph to emphasize key features of the data. A purpose of data visualization is to convey that story to the reader in a clear and impactful way. ![]()
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