-
ACTION = _CHAR (Read)
-
The type of plot to produce. This can be "C", "P" or "S",
with the following meanings:
- "C" (connect) - This action simply draws straight line
segments between the data points.
- "P" (points) - Draw a symbol at each of the data points. The
symbol type that is used to mark each point is determined in
one of 3 ways:
- If no SYMBOL parameter is supplied on the command line,
and no symbol numbers have been read into the symbol data
area by READF, the point style will be set by the current
value of SYMBOL.
- If no SYMBOL parameter is supplied on the command line,
and values have been read into the symbol data area by
READF, the symbol number for each point will determine
the style of the point plotted.
- If SYMBOL is specified on the command line, it will
override each of the above options. The same specified
symbol will be used to mark all points.
The value of the symbol index should be an integer which
refers to the standard PGPLOT symbols.
- "S" (sizeplot) - This action uses the values stored in the
ZCOL data area to determine the size of the plotted symbol.
The value of each entry in the ZCOL data area is effectively
used as an argument to a CHANGE CHEIGHT command before each
point is plotted. The SCALE parameter can be used to make
these values cover a reasonable range by multiplying the Z
data values.
[The value is prompted for.]
-
SYMBOL = _INTEGER (Read and Write)
-
The PGPLOT symbol number that is used to mark the data points.
If a value is specified on the command line, it will be used
for plotting symbols for all the data. If not value is
specified on the command line, the application attempts to use
the SYMCOL data for its symbols. If no symbol values have been
read into the SYMCOL data area, the current value is used for
all the data. The current value is initially set to 1.
-
SCALE = _REAL (Read and Write)
-
The scale factor used to multiply the ZCOL data values to get
a reasonable range of symbol sizes when ACTION="S".
If no value is specified on the command line, the current
value is used. The current value is initially set to 1.0.
-
PROJECTION = _CHAR (Read)
-
Specifies the geometry that is to be used to plot the data.
This is explained in more detail in the section on
projections. Allowed values: "NONE", "TAN", "SIN", "ARC",
"GLS", "AITOFF", "MERCATOR" and "STG".
This parameter is not specified on the command line. The value
of the global parameter PONGO_PROJECTN is used. If
PONGO_PROJECTN is not defined, the default value "NONE" is
used.
-
RACENTRE = _CHAR (Read)
-
The centre of the projection in RA (i.e. the angle must be
specified as hh:mm:ss.sss). This parameter is only required for
PROJECTION values other than "NONE".
This parameter is not specified on the command line. The value
of the global parameter PONGO_RACENTRE is used. If
PONGO_RACENTRE is not defined, the default value "0" is used.
-
DECCENTRE = _CHAR (Read)
-
The centre of the projection in declination (i.e. the angle
must be specified as dd:mm:ss.sss). This parameter is only
required for PROJECTION values other than "NONE".
This parameter is not specified on the command line. The value
of the global parameter PONGO_DECCENTRE is used. If
PONGO_DECCENTRE is not defined, the default value "0" is used.
