DESCRIPTION

No parameter setting functions are available for the Conrec_family utility. Parameters were set through common blocks CONRE1 and CONRE4. There are three versions of the CONREC code. The normal version is in the standard NCAR Graphics library. The other two versions are in optional libraries one of which is linked when the ncargf77 option -quick, or -super is declared on the command line.

The CONREC and EZCNTR entries can be invoked in four different ways to create contour plots which vary considerably in appearance. The four variations include quick, normal, smooth, and super contour lines. This progression represents a tradeoff between speed of computation and the appearance of the contour plots. These variations are specified through selected command line options of the ncargf77 command.

For normal or smooth options the parameter set is:

 COMMON /CONRE1/ IOFFP      ,SPVAL
 COMMON /CONRE4/ ISIZEL     ,ISIZEM     ,ISIZEP     ,NREP       ,
1                NCRT       ,ILAB       ,NULBLL     ,IOFFD      ,
2                EXT        ,IOFFM      ,ISOLID     ,NLA        ,
3                NLM        ,XLT        ,YBT        ,SIDE

For the quick option the parameter set is:

 COMMON /CONRE1/ IOFFP      ,SPVAL
 COMMON /CONRE4/ ISIZEM     ,ISIZEP     ,NLA        ,NLM        ,
1                XLT        ,YBT        ,SIDE       ,ISOLID     ,
2                EXT        ,IOFFD      ,IOFFM

For the super option the parameter set is:

 COMMON /CONRE1/ IOFFP      ,SPVAL      ,IHILO
 DATA ISIZEL,ISIZEM,ISIZEP,NLA,NLM,XLT,YBT,SIDE,ISOLID,NREP,NCRT/
1       1,  2,   0, 16, 40,.05,.05,  .9,  1023,   6,   4/
 DATA EXT,IOFFD,NULBLL,IOFFM,ILAB/.25,0,3,0,1/

Definitions of the inclusive set follow:

ISIZEL

Size of line labels in Plotter Address Units (PAUs). 0 = 8 PAUs, 1 = 12 PAUs, 2 = 16 PAUs, 3 = 24 PAUs, > 3 means use this number of PAUs. [Default = 1]

ISIZEM

Size of labels for minimums and maximums, as per the size definitions given for ISIZEL. [Default = 2]

ISIZEP

Size of labels for data point values as per the size definitions given for ISIZEL. [Default = 0]

NLA

Approximate number of contour levels when internally generated. [Default = 16]

NLM

Maximum number of contour levels. If this is to be increased, the dimensions of CL and RWORK in conrec.f must be increased by the same amount. [Default = 40]

XLT

Left hand edge of the plot (0.0 is the left edge of the frame and 1.0 is the right edge of the frame.) [Default = .05]

YBT

Bottom edge of the plot (0.0 is the bottom of the frame and 1.0 is the top of the frame.) [Default = .05]

SIDE

Length of longer edge of plot (see also EXT). [Default = .90]

NREP

Number of repetitions of the dash pattern between line labels. [Default = 6]

NCRT

Number of CRT units per element (bit) in the dash pattern. [Default = 4]

ILAB

Flag to control the drawing of line labels. - ILAB non-zero means label the lines. - ILAB = 0 means do not label the lines. [Default = 1]

NULBUL

Number of unlabeled lines between labeled lines. For example, when NULBLL = 3, every fourth level is labeled. [Default = 3]

IOFFD

Flag to control normalization of label numbers. - IOFFD = 0 means include decimal point when possible (do not normalize unless required). - IOFFD non-zero means normalize all label numbers and output a scale factor in the message below the graph. [Default = 0]

EXT

Lengths of the sides of the plot are proportional to M and N (when CONREC sets the window and viewport). In extreme cases, when MIN(M,N)/MAX(M,N) is less than EXT, Conrec produces a square plot. [Default = .25]

IOFFP

Flag to control special value feature. - IOFFP = 0 means the special value feature is not in use. - IOFFP non-zero means the special value feature is in use. (SPVAL is set to the special value.) Contour lines will then be omitted from any cell with any corner equal to the special value. [Default = 0]

SPVAL

Contains the special value when IOFFP is non-zero. [Default = 0.]

IOFFM

Flag to control the message below the plot. - IOFFM = 0 if the message is to be plotted. - IOFFM non-zero if the message is to be omitted. [Default = 0]

ISOLID

Dash pattern for non-negative contour lines. [Default = 1023]

COPYRIGHT

Copyright (C) 1987-2009
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.