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[GREG1\]POINTS [Xarray Yarray] [/BLANKING Bval [Eval]] [/SIZE Zvalue
[Zarray [Exponent]]] [/MARKER SidesArray StyleArray]
Makes points of the current style (MARKER), size (MARKER and EXPAND),
and orientation (ORIENTATION) at the X and Y coordinates read by COLUMN,
or in the variables Xarray and Yarray.
With the option /SIZE, followed by a real value Zvalue, POINTS will draw
markers of sizes governed by the values of the Z array (or of the Zarray
if specified). Points with Z value equal to Zvalue will have a marker of
size the current marker size. All other markers will have an AREA pro-
portional to the Z value at each point (i.e. marker radius at X(i) Y(i)
proportional to the square root of Z(i); this power law exponent can be
changed by specifying an additional argument to option /SIZE). If Zval-
ue is equal to zero, the program uses the maximum absolute value of the
Z array instead.
The /BLANKING option can be used to override the current blanking be-
haviour, as defined by SET BLANKING command. If Eval (defined by /BLANK-
ING or SET BLANKING) is null or positive, blanking is enabled. If /SIZE
is used, blanking applies to the Z (or Zarray) values, e.g. in a context
of a (coordinate,coordinate,intensity) map. If /SIZE is not used, blank-
ing applies to the Y (or Yarray) values, e.g. in a context of a (abscis-
The /MARKER option can be used to specify a different marker sidedness
and style for each data point.