specifies one or more plot requests. Each plot request specifies the variables to plot
and produces a separate cell. All variables must be in the input data set. Multiple plot
requests are separated with blanks. You can plot character or numeric variables. A
plot request can be either of these:
y-variable*x-variable
plots the values of two variables.
y-variable
variable plotted on the left vertical axis.
x-variable
variable plotted on the horizontal axis.
(y-variable(s))*(x-variable(s))
plots the values of two or more variables and produces a separate cell for each
combination of Y and X variables. ...
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