.TH Halftone 3NCARG "March 1993" UNIX "NCAR GRAPHICS"
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.SH NAME
Halftone - is a utility for drawing half-tone pictures in which the
gray scale level is proportional to the value in a two dimensional array.
.SH STATUS
Halftone is obsolete.  It has been replaced by the CPCICA entry of the
Conpack contouring package.
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Halftone continues to be provided for compatibility of early NCAR Graphics
codes.  If you are writing new code, we suggest that you use CPCICA.
.SH SYNOPSIS
EZHFTN(Z,M,N) - draws a half-tone picture based upon a set of default options.
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HAFTON (Z,L,M,N,FLO,HI,NLEV,NOPT,NPRM,ISPV,SPVAL) - Draws a half-tone
picture from data stored in a rectangular array with the
intensity in the picture proportional to the data value.
.SH ACCESS 
To use EZHFTN or HAFTON, load the NCAR Graphics libraries ncarg, ncarg_gks,
and ncarg_c, preferably in that order.
.SH SEE ALSO
Online:
hafton, ezhftn, halftone_params,
conpack, conpack_params, cpcica
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Hardcopy:  
NCAR Graphics Contouring and Mapping Tutorial;
NCAR Graphics Fundamentals, UNIX Version;
User's Guide for NCAR GKS-0A Graphics
.SH COPYRIGHT
Copyright (C) 1987-2000
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University Corporation for Atmospheric Research
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This documentation is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This software is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with this software; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
