specifies the number of evenly spaced internal knots.
Default
100
NOGROUP
specifies that the curve does not use the group variable from the scatter plot.
SMOOTH=numeric-value
specifies a smoothing parameter value. If you do not specify this option, then a
smoothing value is determined automatically.
Restriction
To use this option, all of the X and Y variables must be numeric.
REFTICKS <=(options)>
duplicates the tick marks from the X and Y axes on the opposite sides of each cell.
You can also specify options:
LABEL
in addition to the tick marks, displays the axis label.
VALUES
in addition to the tick marks, displays the values that are represented ...
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