1NCARGINTRO(5NCARG)               NCAR GRAPHICS              NCARGINTRO(5NCARG)
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NAME

6       ncargintro - NCAR Graphics Overview
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SYNOPSIS

9       ncargintro
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DESCRIPTION

12       NCAR  Graphics  is a collection of graphics libraries that supports the
13       display of scientific data. The low-level utilities (LLUs) are the tra‐
14       ditional  C  and  Fortran  interfaces  for contouring, mapping, drawing
15       field flows, drawing surfaces, drawing histograms, drawing  X/Y  plots,
16       labeling, and more.
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18       Output  from these interfaces can be directed in a combination of three
19       ways: an NCGM (NCAR Graphics Computer Graphics Metafile), an  X11  win‐
20       dow,  or  one  of  many  PostScript  outputs (regular, Encapsulated, or
21       Interchange PostScript format).  Other formats  are  available  through
22       NCGM translators and accompanying device drivers.
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MATH LIBRARY

25       As  of March, 1998 the Ngmath library contains a collection of interpo‐
26       lators  for  one-dimensional,  two-dimensional,  and  three-dimensional
27       data.  The  packages  are:  dsgrid  --  a three-dimensional random data
28       interpolator based on a simple inverse distance weighting algorithm.
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30       csagrid -- an approximation  package  for  one-dimensional,  two-dimen‐
31       sional,  and  three-dimensional  random data based on David    Fulker's
32       package Splpack. Csagrid uses cubic splines to calculate its approxima‐
33       tion function.
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35       cssgrid -- an interpolation package for random data on the surface of a
36       sphere. Cssgrid uses cubic splines to calculate its interpolation func‐
37       tion. Cssgrid is based on the work of Robert Renka.
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39       fitgrid  -- an interpolation package for one-dimensional and two-dimen‐
40       sional gridded data based on Alan Cline's  package  Fitpack,  an  early
41       version  of  which is available from netlib. Fitpack uses splines under
42       tension to interpolate in one and two dimensions.
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44       natgrid -- a two-dimensional random data interpolation package based on
45       Dave Watson's package nngridr.
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47       shgrid  --  an interpolation package for random data in 3-space. Shgrid
48       uses a modified Shepard's  algorithm  to  calculate  its  interpolation
49       function. Shgrid is based on the work of Robert Renka.
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ENVIRONMENT VARIABLES

53       Every  user  of  NCAR  Graphics will either need to set the environment
54       variable NCARG_ROOT or the environment variables NCARG_BIN,  NCARG_LIB,
55       and  NCARG_INCLUDE depending on how NCAR Graphics was installed on your
56       system.
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58       If the NCAR  Graphics  binaries,  libraries,  and  include  files  were
59       installed  under  one  root  directory, say for example /usr/local/bin,
60       /usr/local/lib, and /usr/local/include respectively, then  you'll  need
61       to do the following:
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63       setenv NCARG_ROOT /usr/local
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65       If  the binaries, libraries, and include files were NOT installed under
66       one   root   directory,   say   for    example    /usr/local/ncarg/bin,
67       /usr/local/ncarg/lib,  and  /usr/local/include,  then you'll need to do
68       the following:
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70       setenv NCARG_BIN /usr/local/ncarg/bin
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72       setenv NCARG_LIB /usr/local/ncarg/lib
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74       setenv NCARG_INCLUDE /usr/local/include
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76       The environment variable NCARG_GKS_OUTPUT may be  used  to  direct  the
77       metafile  output from the NCAR Graphics GKS package to a file (use just
78       the file name) or to pipe it to a translator  (give  the  name  of  the
79       translator, preceded by a "|").
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81       The  environment  variable NCARG_GKS_PSOUTPUT may be used to direct the
82       PostScript output from the NCAR Graphics GKS package to a file  (stdout
83       is allowed).
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85       The  environment variable NCARG_GKS_PDFOUTPUT may be used to direct the
86       PDF output from the NCAR Graphics GKS package  to  a  file  (stdout  is
87       allowed).
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89       The  environment variables GRAPHCAP and FONTCAP may be used to tell the
90       NCGM translators "ctrans", "ictrans" and "idt" what default  "graphcap"
91       and   "fontcap"   to  use.   See  the  man  pages  for  ctrans(1NCARG),
92       ictrans(1NCARG), and idt(1NCARG) for more information.
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94       The environment variable DISPLAY is not actually used by  the  transla‐
95       tors;  if  you  are using X Windows, it determines where the translator
96       output is to be displayed.
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SEE ALSO

99       Online:
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101       Commands which facilitate compiling and running with NCAR Graphics:
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103       nhlf77(1NCARG), nhlcc(1NCARG), ncargf77(1NCARG), ncargcc(1NCARG), ncar‐
104       gpath(1NCARG), ncargrun(1NCARG)
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106       NCAR Command Language:
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108       ncl
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110       Fortran utilities in NCAR Graphics:
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112       areas(3NCARG),  autograph(3NCARG), bivar(3NCARG), colconv(3NCARG), con‐
113       pack(3NCARG),   dashline(3NCARG),   dashpack(3NCARG),    ezmap(3NCARG),
114       gflash(3NCARG),  gks(3NCARG),  gridall(3NCARG), histogram(3NCARG), iso‐
115       surface(3NCARG),  labelbar(3NCARG),  ngmisc(3NCARG),  plotchar(3NCARG),
116       softfill(3NCARG),   surface(3NCARG),   scrolled_title(3NCARG),  stream‐
117       lines(3NCARG), tdpack(3NCARG), vectors(3NCARG), wmap(3NCARG)
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119       NCGM translators:
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121       ctrans(1NCARG), ictrans(1NCARG), idt(1NCARG), med(1NCARG)
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123       Raster formats and applications:
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125       ras_formats(1NCARG),        ras_palette(1NCARG),        rascat(1NCARG),
126       rasview(1NCARG), rasls(1NCARG), rasgetpal(1NCARG)
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128       LLU NCAR Graphics C-binding:
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130       ncarg_cbind(3NCARG) ncarg_gks_cbind(3NCARG)
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132       Descriptions of environment variables:
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134       ncarg_env(5NCARG),
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136       Descriptions of fontcaps and graphcaps:
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138       fcaps(1NCARG), fontcap(5NCARG), gcaps(1NCARG), graphcap(5NCARG)
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140       Metafile filters:
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142       cgm2ncgm(1NCARG)  ncgm2cgm(1NCARG),  pre2ncgm(1NCARG), psblack(1NCARG),
143       pswhite(1NCARG),
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145       A command which tells you what version of NCAR Graphics you are using:
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147       ncargversion(1NCARG)
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149       Utility for generating NCAR Graphics Fortran and C examples:
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151       ncargex(1NCARG),
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153       Utilities for giving you access to special NCAR Graphics  files  and/or
154       tables.
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156       ncargfile(1NCARG)
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158       Programs for generating sample NCGMs: ncargworld,tgks0a
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160       Online documentation:
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162       http://ngwww.ucar.edu/ngdoc/ng/
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165       Copyright (C) 1987-2002
166       University Corporation for Atmospheric Research
167       The use of this Software is governed by a License Agreement.
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171NCAR                               July 1998                NCARGINTRO(5NCARG)
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