POINT=<character or name of a variable>
(in PLOT operation for scatter diagrams and time series)
specifies the label to be plotted for each observation in the graph.
In case of <name of variable> the values of that variable will be
plotted so that the center of the first character indicates the position
of the observation.
If POINT is omitted, a small dot or circle is plotted for each observation.
Another form of the POINT specification is
POINT=<marker_type>,<marker_size> or
POINT=<marker_type>,<max_marker_size>,<marker_variable>,<max_value>
permitting symbols of various sizes depending on the value of the
marker variable.
The possible values of <marker_type> are 0,1,2,... and their interpre-
tation depends on the plotting device. A table of types is given
on the next page.
The size of the symbol in the general case is
<max_marker_size>*<value_of_marker_variable>/<max_value>
If <max_value>=0, the values of <marker_variable> will be used as
<marker_type> values. Thus different observations may have different
markers.
This can also be done by a POINT_TYPE specification (see POINTT?).
The color of the marker can be specified individually for each
observation (see POINTC?).
Possible Survo marker types on different devices:
Screen PostScript
0 filled circle same
1 plus same
2 asterisk same
3 circle same
4 cross same
5 square same
6 filled square same
7 triangle same
8 filled triangle same
9 diamond same
10 filled diamond same
11 pixel -
21 - arrow ARROWLEN=integer specifies arrow length
22 - filled arrow as coefficient of marker size
default circle circle
size 2 5
In Survo PostScript graphics, POINT=any,0 draws a marker defined
by the PostScript function `dot'. This function is readily defined in
PS.DEV as a tiny dot and may be altered by the user.
In point types 21,22 (arrows) the direction of the arrow is given
in POINT specification of the form POINT=...[rotate(var)]...
where a variable 'var' gives the rotation angle in degrees.
P = more information on plotting
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