Plot a function specified on the command line by
a Fortranlike expression (using
TRANSFORM, SUN/61), or through the parameters resulting from a
previous fit (using a polynomial or spline).
ACTION = _CHAR (Read)
The type of function to be plotted. This must be one of the
following:

"
FUNC"
– Use a Fortranlike expression to define the function.

"
POLY"
– Use a set of polynomial coefficients to define the function.

"
SPLINE"
– Use a set of spline coefficients from the file SPLINEFILE to define the function.
[The value is prompted for.]
EXPRESSION = _CHAR (Read)
The Fortranlike expression to be
plotted, in terms of X.
[The value is prompted for.]
XMIN = _REAL (Read)
The value of X from which the function is
plotted.
[The value of the global parameter PONGO_XMIN is used.]
XMAX = _REAL (Read)
The value of X
to which the function is plotted.
[The value of the global parameter PONGO_XMAX is used.]
INFILE = _LOGICAL (Read)
Used
when ACTION is "POLY". If TRUE then the polynomial coefficients are stored in a file (the first line of
which is the order of the polynomial), otherwise the coefficients are given using the POLYCOEF
parameter.
[FALSE]
NPOLY = _INTEGER (Read and Write)
The order of the polynomial: used when ACTION
is
"
POLY
"
.
[The value of the global parameter PONGO_NPOLY is used.]
POLYCOEF = _DOUBLE (Read)
A
list of polynomial coefficients: used when ACTION is
"
POLY
"
.
[The value of the global parameter PONGO_POLYCOEF is used.]
POLYFILE = _CHAR (Read)
The
name of a file containing the polynomial coefficients to be plotted. Only used when ACTION is
"POLY" and INFILE is TRUE.
[POLYFILE.dat]
SPLINEFILE = FILENAME (Read)
The name of the file containing the coefficients
and knot positions from a previous spline fit – used when ACTION is
"
SPLINE
"
.
[The value of the global parameter PONGO_SPLINEF is used. If PONGO_SPLINEF is not defined, the
value is prompted for.]