conop1(3NCARG)
NAME
CONOP1 - sets option switches for the Conran_family utility.
SYNOPSIS
CALL CONOP1 (IOPT)
DESCRIPTION
IOPT Character, input -- Selects an internal parameter and sets
an option switch. The possibilities are:
'DEF'
'EXT=ON' or 'EXT=OFF'
'GRI=ON' or 'GRI=OFF'
'ITP=C1' or 'ITP=LIN'
'LAB=ON' or 'LAB=OFF'
'LOT=ON' or 'LOT=OFF'
'MES=ON' or 'MES=OFF'
'PDV=ON' or 'PDV=OFF'
'PER=ON' or 'PER=OFF'
'PMM=ON' or 'PMM=OFF'
'PSL=ON' or 'PSL=OFF'
'REP=ON' or 'REP=OFF'
'SCA=ON' or 'SCA=OFF' or 'SCA=PRI'
'TFR=ON' or 'TFR=OFF'
'TOP=ON' or 'TOP=OFF'
'TRI=ON' or 'TRI=OFF'
The following options are defined by this subroutine:
DEF This option resets ALL parameters to their default values.
DEF has no 'ON' or 'OFF' states.
To activate: CALL CONOP1('DEF')
EXT Parameter to set extrapolation. Normally all CONRAN
versions will only plot the boundaries of the convex hull
defined by the user's data. To have the contours fill the
rectangular area of the frame, set the EXT switch ON. The
default is OFF.
To turn on: CALL CONOP1('EXT=ON')
To turn off: CALL CONOP1('EXT=OFF')
GRI The parameter to display the grid. GRI is OFF by default.
To turn on: CALL CONOP1('GRI=ON')
To turn off: CALL CONOP1('GRI=OFF')
Note: If GRI=ON, the virtual grid will be superimposed over
the contour plot. The X and Y tick intervals will be
displayed under the map only if PER=ON. (see PER)
ITP Set the interpolation scheme. There are two schemes --
C1 surfaces and linear. The C1 method takes longer but
will give the best results when the data is sparse (less
than 100 points). The linear method will produce a better
plot when there is a dense data set. The default is C1
surface.
For C1 surface CALL CONOP1('ITP=C1')
For linear CALL CONOP1('ITP=LIN')
LAB This parameter can be set to either label the contours
(LAB=ON) or not (LAB=OFF). The default value is LAB=ON.
(Does not apply to entry CONRAQ.)
To turn on: CALL CONOP1('LAB=ON')
To turn off: CALL CONOP1('LAB=OFF')
LOT The parameter to list options on the printer. The default
value is OFF: no options are displayed.
To turn on: CALL CONOP1('LOT=ON')
To turn off: CALL CONOP1('LOT=OFF')
Note: Print is directed to the standard output unit.
MES The parameter to plot a message. The default is ON.
To turn on: CALL CONOP1('MES=ON')
To turn off: CALL CONOP1('MES=OFF')
Note: If MES=ON, a message is printed below the plot giving
contour intervals and execution time in seconds. If PER or
GRI is ON, the message also contains the X and Y tick
intervals.
PDV The parameter to plot the input data values. The default
value is PDV=OFF.
To turn on: CALL CONOP1('PDV=ON')
To turn off: CALL CONOP1('PDV=OFF')
Note: If PDV=ON, the input data values are plotted relative
to their location on the contour map. If you only wish to
see the locations and not the values, set PDV=ON and change
FMT to produce an asterisk (*) such as (I1).
PER The parameter to draw a perimeter. The default value is
PER=ON, which causes a perimeter to be drawn around the
contour plot.
To turn on: CALL CONOP1('PER=ON')
To turn off: CALL CONOP1('PER=OFF')
Note: If MES is ON, the X and Y tick intervals will be
given. These are the intervals in user coordinates that
each tick mark represents.
PMM The parameter to plot relative minima and maxima. (Does
not apply to entry CONRAQ.) This parameter is OFF by
default.
To turn off: CALL CONOP1('PMM=OFF')
To turn on: CALL CONOP1('PMM=ON')
PSL The parameter which sets the plot shield option. The
outline of the shield will be drawn on the same frame as
the contour plot. (Does not apply to entry CONRAQ.) By
default this option is OFF.
Draw the shield: CALL CONOP1('PSL=ON')
Don't draw it: CALL CONOP1('PSL=OFF')
Note: See parameter SLD using "man conop3" to see how the
polygon is entered which defines the shield.
REP The parameter indicating the use of the same data in a new
execution. The default value is OFF.
To turn on: CALL CONOP1('REP=ON')
To turn off: CALL CONOP1('REP=OFF')
Note: If REP=ON, the same X-Y data and triangulation are to
be used, but it is assumed that the user has changed the
contour values or resolution for this run. Scratch arrays
WK and IWK must remain unchanged.
SCA The parameter for scaling of the plot on a frame. This
parameter is ON by default.
User scaling: CALL CONOP1('SCA=OFF')
Program scaling: CALL CONOP1('SCA=ON')
Prior window: CALL CONOP1('SCA=PRI')
If SCA=OFF, plotting instructions are issued using the
user's input coordinates. SCA=OFF should be used to
interface with EZMAP. If SCA=ON, a viewport is established
such that the plot will fit into the center 90 percent of
the frame. If SCA=PRI, the program maps the user's plot
instructions into the portion of the frame defined by the
current normalization transformation.
TFR The parameter to advance the frame before triangulation.
The default value is TFR=ON, which means that the contours
and the triangles will be plotted on separate frames.
If program set: CALL CONOP1('TFR=ON')
To turn off: CALL CONOP1('TFR=OFF')
Note: Triangles are plotted after the contouring is
completed. To see the triangles over the contours, set
TFR=OFF.
TOP The parameter to plot only the triangles.
To turn off: CALL CONOP1('TOP=OFF')
To turn on: CALL CONOP1('TOP=ON')
Setting TOP=ON causes parameters TRI and TFR to be set to
TRI=ON, and TFR=OFF. Setting TOP=OFF results in TRI=OFF
and TFR=ON. If another setting is wanted for either TRI or
TFR, it should be reset after the TOP call.
Note: The user may wish to overlay the triangles on some
other plot. 'TOP=ON' will allow that.
TRI The parameter to plot the triangulation. The default is
OFF and therefore the triangles are not drawn.
To turn on: CALL CONOP1('TRI=ON')
To turn off: CALL CONOP1('TRI=OFF')
Note: Plotting the triangles will indicate to the user
where good and bad points of interpolation are occurring in
the contour map. Equilateral triangles are optimal for
interpolation. Quality degrades as triangles approach a
long and narrow shape. The convex hull of the
triangulation is also a poor point of interpolation.
USAGE
CONOP1 is called to toggle Conran_family options before entries CONRAN, CONRAQ, or CONRAS are called to generate the contour plot.
EXAMPLES
Use the command ncargex to see the following examples: tconaq, tconan, and tconas.
ACCESS
To use CONOP1 load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably in that order.
MESSAGES
See the conran_family man page for a description of all Conran_family error messages and/or informational messages.
SEE ALSO
Online: conran_family, conran_family_params, conran, conraq, conras, conop2, conop3, conop4, conpack, conpack_params Hardcopy: NCAR Graphics Contouring and Mapping Tutorial; NCAR Graphics Fundamentals, UNIX Version; User's Guide for NCAR GKS-0A Graphics
COPYRIGHT
Copyright (C) 1987-2009 University Corporation for Atmospheric Research The use of this Software is governed by a License Agreement.
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