graph(1)         U.S. Geological Survey (wrdapp)         graph(1)


NAME
       graph - Interface to Graphical Kernel System (GKS)

ABSTRACT
       The GRAPH library contains a set of routines that have been used to
       generate a range of plots in hydrologic applications.  Graphics
       include time plots at scales of minutes to years, x-y plots, and
       probability plots.  Non-time axes can be arithmetic, logarithmic, or
       probability.  Probability plots with Gaussian transformations can be
       fraction, percent, or recurrence interval.  The library was
       developed using the Graphical Kernel System (GKS) standard to
       provide portability.  The GRAPH library is used by ANNIE, GLSNET,
       HSPEXP, HYSEP, PEAKFQ, SWSTAT, and other programs.

       The GRAPH library is included in the LIB distribution.  It requires
       the UTIL and STATS libraries from the LIB distribution.

SYSTEM REQUIREMENTS
       GRAPH is written in Fortran 77 with the following extension: use of
       include files. The GRAPH library requires STATS and UTIL libraries.

DOCUMENTATION
       A subroutine reference guide is provided in the distribution.

SUPPORTING SOFTWARE
       The GRAPH library is written using the GKS standard.  An
       implementation of GKS is required for the UNIX platform.  The PC
       version includes a set of routines that translate GKS calls to
       Interactive Software Services's INTERACTER calls.

       GKS libraries are available from a number of vendors.  Free or
       shareware versions are available via anonymous ftp to:

          ftp.zam.kfa-juelich.de in /pub/unix/graphics/gligks
                                     gligks-4.5.[17 18].tar.gz
                                    (works under linux, sun, aix, osf,
                                     pc (Lahey FORTRAN))

          unidata.ucar.edu in /pub/xgks

CONTACTS
       Operation and Distribution:
          U.S. Geological Survey
          Hydrologic Analysis Software Support Program
          437 National Center
          Reston, VA 20192

          h2osoft@usgs.gov

       Official versions of U.S. Geological Survey water-resources analysis
       software are available for electronic retrieval via the World Wide
       Web (WWW) at:

                  http://water.usgs.gov/software/



                            7 Jul 1998                          1





graph(1)         U.S. Geological Survey (wrdapp)         graph(1)


       and via anonymous File Transfer Protocol (FTP) from:

                  water.usgs.gov (path: /pub/software).

       The WWW page and anonymous FTP directory from which the LIB software
       can be retrieved are, respectively:

                  http://water.usgs.gov/software/lib.html
                                --and--
                  /pub/software/general/lib















































                            7 Jul 1998                          2