Provided by: dx_4.4.4-9_amd64 bug


       dx  -  start  the  Data Explorer visualization system.  Optionally directly start the User
       Interface (dxui), the executive (dxexec), the Data Prompter, the  Module  Builder  or  the


       dx   [ -8bitcmap < private | shared | 0-1 > ]
            [ -builder ]
            [ -cache < on | off > ]
            [ -colors < colors file > ]
            [ -connect < host:port > ]
            [ -data < path list > ]
            [ -directory  < dir > ]
            [ -display < display name > ]
            [ -dxroot < dir > ]
            [ -echo ]
            [ -edit ]
            [ -encode ]
            [ -exec < executable > ]
            [ -execonly ]
            [ -execute ]
            [ -execute_on_change ]
            [ -full ]
            [ -file < filename > ]
            [ -help ]
            [ -highlight < on | off > ]
            [ -host < host name > ]
            [ -hwrender < gl | opengl > ]
            [ -image ]
            [ -include < path list > ]
            [ -key < 64bit hex > ]
            [ -license < type > ]
            [ -local ]
            [ -log < on | off > ]
            [ -macros  < path list > ]
            [ -mdf < filename > ]
            [ -memory < # of Mbytes > ]
            [ -menubar ]
            [ -metric ]
            [ -modules < path list > ]
            [ -morehelp ]
            [ -nodeid ]
            [ -optimize < memory | precision > ]
            [ -outboarddebug ]
            [ -processors ]
            [ -program < filename > ]
            [ -prompter ]
            [ -readahead < on | off > ]
            [ -script [ < script file > ] ]
            [ -startup ]
            [ -suppress ]
            [ -timing < on | off >]
            [ -trace < on | off > ]
            [ -trialkey ]
            [ -tutor ]
            [ -uionly | -execonly ]
            [ -verbose ]
            [ -version]

       dx   -prompter      ( start the Data Prompter )
            [ -full ]
            [ -file ] [ < header file name > ]

       dx   -builder  ( start the Module Builder )
            [ -file ] [ < .mb file name > ]


       dx  is the command that starts the Data Explorer Startup Window, and optionally starts the
       Data Explorer User Interface, Data Explorer Executive, Data Explorer Data  Prompter,  Data
       Explorer Module Builder or the Data Explorer Tutorial.

       The Data Explorer Startup Window is an X windows/Motif based application which allows easy
       access to the other subsystemes of the Data Explorer visualization system.

       The Data Explorer User Interface is an X windows/Motif based application that  provides  a
       visual  programming environment and an interface to the executive.  The executive provides
       the computational tools and mechanisms to create data visualizations.  The

       Data Explorer Data Prompter is an X  windows/Motif  based  application  that  helps  users
       import  data  in  a  variety  of  formats, and provides general purpose visual programs to
       visual imported data, leading to a shortened "time to first picture".

       The Data Explorer Module Builder is an X windows/Motif based application that helps  users
       build their own modules to be included in a custom version of Data Explorer.

       The  Data  Explorer Tutorial is an application that helps users learn to use Data Explorer
       by leading them through a sequence of tasks.  Users can easily skip around in the tutorial
       in order to concentrate on tasks of most use to their work.

       For  a more complete description of the Data Explorer User Interface and Executive see the
       IBM Visualization Data Explorer User's Guide.  For a more complete description of the Data
       Explorer  Data  Prompter  see the IBM Visualization Data Explorer QuickStart Guide.  For a
       more thorough description of the Data Explorer Module Builder see  the  IBM  Visualization
       Data Explorer Programmer's Reference.


       With  no options the dx command starts the Startup Window, an X windows/Motif program from
       which the other parts of the Data Explorer system can be  started.   The  various  command
       line options and environment variables listed below can be specified to change the default

       Options set by including them in the DXARGS environment variable are placed at  the  start
       of  the  command  line,  followed by any options set by environment variables, followed by
       explicit command line arguments.  When conflicting options are given, the last option  has

       -8bitcmap < private | shared | 0-1  | -1 >
              Overrides the DX8BITCMAP environment variable (see ENVIRONMENT VARIABLES below).

       -cache < on | off >
              Turn  on  or  off  the  executive  caching  system.  When the Data Explorer caching
              mechanism  is  enabled  the  Data  Explorer  executive  automatically  caches   the
              intermediate  results  generated  during  its  visualization  computations.  Unlike
              standard  caching  mechanisms,  these  results  are  accessed  by  means  of  their
              functional  derivation.   This allows for automatic graph optimization and helps to
              avoid the recomputation of previously utilized intermediates, especially  when  the
              Data Explorer sequencer is being used.  In certain rare instances, a machine with a
              small amount of memory may want to disable this  caching  to  conserve  memory  and
              reduce paging.  Default = on.

       -colors < colors file >
              Override DXCOLORS environment variable (see ENVIRONMENT VARIABLES below).

       -connect < host:port >
              Start a distributed executive only (no user interface).

       -data < path list >
              Override DXDATA environment variable (see ENVIRONMENT VARIABLES below).

       -directory < dir >
              Cause the executive to be run in the given directory.

       -display < display name >
              Set the name of the X display to be used by the user interface and the executive.

       -dxroot < dir >
              Overrides the default dx root directory.

       -echo < dir >
              Echo the command lines without executing them.

       -edit  Cause  the user interface to be started with the Visual Program Editor (VPE) window
              as the top level window of the user interface (the top level window is  denoted  by
              an  anchor  in  the  upper  left  hand  corner).   Also  see -image, -startup,  and

       -encode < filename >
              Encode the given file into a binary format with a key (which must be specified with
              the -key option). For example
                  dx -encode -key 1234567890abcdef The resulting file can only be encoded
              by the DX user interface when the same key is used. For example
                  dx -image -key 1234567890abcdef

       -exec < executive executable >
              Use the given file as a replacement for the executive.  This option allows  a  user
              to build and use his/her own custom executive.

              Start  the  executive  in remote mode in which it will then await a connection from
              the user interface.  The user interface is not started with this option.  Also  see

              Execute once after the user interface has made a connection with the executive.

              Cause  Data  Explorer  to  go into execute-on-change mode at start up.  Execute-on-
              change mode causes the Visual Program to be executed any time  any  of  the  values
              (i.e. module inupts, interactor values...)  in the program change.

       -file < filename >
              Start  the  Data Prompter, Module Builder, or Data Explorer User Interface with the
              header file filename.

       -full  When used with -prompter, starts the full Data Prompter.

       -help  Print a brief listing of options and usage for dx.

       -highlight < on | off >
              Turn on or off module execution highlighting.  If highlighting is  turned  on,  the
              user interface will highlight each module as it is executed.  Default = on.

       -host < host name >
              Override DXHOST environment variable (see ENVIRONMENT VARIABLES below).

       -hwrender < gl | opengl >
              Override  the  default  hardware  rendering  choice  on  platforms  where  both are
              supported. Default is opengl. Sets  the  DXHWMOD  environment  variable  to  either
              DXhwdd.o or DXhwddOGL.o.

       -image Cause  the  user  interface  to  be  started with the image window as the top level
              window of the user interface.  Also, control panels that  are  configured  to  open
              automatically are opened.  Also see -edit, -startup and -menubar.

       -include < path list >
              Override DXINCLUDE environment variable (see ENVIRONMENT VARIABLES below).

       -key < 64bit hex >
              16  character  hexidecimal  (64bit)  number  that is used to encode and decode .net
              files. See -encode.

       -license < type >
              Force a specific license for either the user interface or executive.  The following
              are valid values for type:

              runtime: forces a run-time license (UI or executive).

              timed: forces a timed (limited function) license (UI only).

              develop: forces a developer license (UI or executive).

       -local Override the DXHOST environment variable (if set) and cause the executive to be run
              on the local host.  In the absence of the DXHOST environment variable, this is  the

       -log < on | off >
              Turn  on or off executive logging.  If logging is on then the executive logs output
              to the file dx.log in the directory where the executive is  executing.   Default  =

       -macros < path list >
              Override the DXMACROS environment variable (see ENVIRONMENT VARIABLES below).

              Start Data Explorer with a menubar as the anchor window.  Also, control panels that
              are configured to open automatically are  opened.   See  also  -image,  -edit,  and

       -mdf < mdf file >
              Override the DXMDF environment variable (see ENVIRONMENT VARIABLES below).

       -memory < # of MB >
              Set  the  maximum  amount  of  memory,  in  megabytes  rounded up to a two megabyte
              boundary, that the executive is able to allocate.  Default = the amount of physical
              memory minus 8 MB.

              Have  the ui use metric units when possible, for example for setting the image size
              for printing postscript images.

       -modules < pathlist >
              Set the list of directories to be searched for outboard modules.

              Displays this information

              print out the node id of the machine that the command is run on.  The  node  id  is
              used when generating a license.

       -optimize < memory | precision >
              Select  whether  to  minimize  memory  usage or produce more color-accurate images.
              When memory is optimized, image objects are generated with 24 bits/pixel instead of
              96, and ReadImage will produce delayed color images if supported by the format. The
              default is precision.

              Enable user to start outboard modules manually for debugging when they  are  called
              in a visual program.

              For Data Explorer SMP, sets the number of processors to use.

       -program < programname >
              Start the user interface with the visual program filename.

              Start the data prompter.

       -readahead < on | off >
              Specify  whether  or  not  the  executive  reads  ahead  in its input stream before
              executing the commands it receives from the stream.  If this is  turned  off,  then
              the executive will execute each command line as it is received.  This is useful for
              certain debugging purposes, such as memory leak detection.  Default = on.

       -script [ < script file > ]
              Run just the executive in script mode.   If  a  file  name  is  provided  then  the
              executive  reads  and  executes commands from the given script and then terminates.
              If a file is not provided then when the executive starts up it  enters  interactive
              mode where it waits for script commands.  Also see -execonly.

              Start  Data  Explorer  with  the  startup window as the initial window. This is the
              default. See also -image, -edit, and -menubar.

              Do not open any control panels at  start-up.  This  is  used  in  -image  mode  and
              -menubar mode only.

       -timed Start DX using a timed license.

       -timing < on | off >
              Turn on or off the executive timing mechanism.  If enabled, then when the executive
              exits it will list on standard output or the logging  file  timing  statistics  for
              each module that was used during the course of execution.  Default = off.

       -trace < on | off >
              Turn  on  or  off  the  executive  trace  mechanism.   When  tracing is enabled the
              executive displays informative messages about  the  execution  sequence  on  either
              standard output or the log file if logging is enabled.  Default = off.

              Determines the information necessary for generating a trialkey.

       -tutor Start the Data Explorer tutorial.

              Cause the user interface to be started without making a connection to an executive.

              Echo commands in the dx script as they are executed.

              Print version numbers of various executables.


       The following environment variables provide an alternate way to set certain of the command
       line options, or alter the default behavior of Data Explorer in some way. Options set with
       environment  variables  are overridden if the same option is also specified on the command
       line.  Options set with DXARGS are overridden by both environment variables  and  explicit
       command line options.

              When  Data  Explorer  displays  images  in  8-bit windows, it makes every effort to
              create an accurate representation of the image using the  default  colormap  shared
              among  applications  using  8-bit windows.  If the colors required by Data Explorer
              are not present in the colormap and there are not enough free color cells available
              in   the   shared   color  map  for  their  allocation,  Data  Explorer  will  find
              approximations  among  the  colors  that  are  available.   However,   in   certain
              circumstances,  the  difference  between the desired color and the approximation is
              found to be too great to be acceptable.  In such circumstances, DX will allocate  a
              private  colormap  for  more  accurate  results.  In this case, depending on your X
              server, you may need to move the mouse to select the Image  or  Display  window  in
              order for the correct colors to appear.  The -8bitcmap flag sets the level at which
              the change to using a private colormap is made.  The value of this parameter should
              be  a  number  between  0  and  1, or "private" or "shared", and it repressents the
              Euclidean distance in RGB color space, normalized to 1,  for  the  maximum  allowed
              discrepancy.  If you set this parameter to 1, then a private colormap will never be
              used. If you set it to -1, then a private colormap will always be used. The default
              is 0.1.

       DXARGS This  contains  the  default set of arguments used by the dx script.  The arguments
              are prepended to those given to dx on the command line.  This variable  allows  for
              the dx command to be easily customized.

              Sets  the  number  of  digits  in  axes tick labels at which a switch to scientific
              notation is made. The default is 7.

              This contains the name of an alternate  file that contains mappings of color  names
              to  red, green, blue triplets in a format like that of the default color file found
              in /usr/lpp/dx/lib/colors.txt.

       DXDATA This contains a colon separated list of directories in  which  the  executive  will
              search for data files.  Also see the -data option.

              If  set  to anything other than 0, enables ReadImage to create delayed color images
              if the image is a tiff format image saved in a byte-with-colormap format or  a  gif

       DXEXEC Specifies an executive to be run at start-up.

              If  DXFLING  is  set  to 1, then for hardware-rendered images, in rotation mode and
              execute-on-change mode, if you drag the mouse across the  image,  and  release  the
              mouse  button  outside the image, the object in the image will begin to rotate, and
              will continue to rotate until you click inside the image.  The direction and  speed
              of  the mouse motion before release will affect the rotation direction and rotation
              speed of the object in the window.

              Sets the gamma correction for software-rendered  images  displayed  to  the  screen
              using  the  Display  and  Image  tools.   The  default value is 2, except for 8-bit
              windows on the sgi architecture.

              DXGAMMA_12BIT, DXGAMMA_24BIT sets the gamma correction factor for software-rendered
              images for the windows with the indicated window depth.  Overrides the value set by

       DXHOST This contains the name of the host machine that will run the executive.  If this is
              not  set  then  a  default  of  "localhost" is used, unless the local host is a PVS
              console in which case the default is to run the executive on the PVS.  Also see the
              -host, -local and -server options.

              Sets  the  gamma  correction  for  hardware-rendered images displayed to the screen
              using the Display and Image tools.  The default value is 2.

              Specifies the name of the hardware rendering library to use when more than  one  is
              supported. Should be either DXhwdd.o or DXhwddOGL.o.

              This  contains  a  colon  separated list of directories in which the executive will
              search for "included" scripts.  Also see the -include option.

              This contains a colon separated list of directories in  which  the  user  interface
              searches for macros that will be automatically loaded.  When running in script mode
              one must "include" all the macros by hand prior to referencing them.  Also see  the
              -macros option.

       DXMDF  This  contains  the  name  of  a  module  description file (mdf) that contains user
              defined modules for a customized version of  the  executive.   Also  see  the  -mdf

              sets the amount of memory (in megabytes) that can be used by the executive.

              This contains a colon separated list of directories in which the executive searches
              for outboard modules.  Also see the -modules option.

              For faces, loops, and edges data, if set, allows loops  other  than  the  enclosing
              loop  for  a  face  to  be listed first. However, there is a consequent decrease in
              performance if this environment variable is set.

              If set to anything,  disables  framebuffer  readbacks.   Setting  this  environment
              variable  may  improve  performance  of  interaction with hardware rendered images,
              especially for machines for which readback is slow. The default  behavior  is  that
              framebuffer  readbacks  are enabled. If you set this environment variable, not that
              some interactions using  the  Image  tool  will  result  in  a  black  image  while
              interaction  is  taking  place. However, if you are not using the Image tool, it is
              strongly recommended that you set this environment variable.

              sets the image type to either 24-bit color images  or  floating-point-based  96-bit
              images  (the  default).  This  affects  the behavior of Render and ReadImage.  This
              variable can be set to either DXByte (24 bits) or DXFloat (96 bits).  Setting  this
              variable to DXByte will result in images taking up less memory.

              Sets the number of processors to be used for Data Explorer SMP.

       DXRSH  Specifies the remote shell command to use when connecting to other systems (such as
              those when using distributed execution). The default is the the path to rsh.

              Prevents the remote "invoke dxexec" script from being written with  a  full  carbon
              copy of the local environment (only DISPLAY is set).

       DXROOT Specifies  the top-level directory for all the files and directories needed by Data

              If set to anything other than -1, forces shared memory to be used  (if  allowed  by
              the  architecture).   If set to -1, (if allowed by the architecture) will cause the
              data segment to simply be extended. Please see Appendix C of the Data Explorer User
              Guide for more information.

              Allows  the user to specify the size of the send and receive buffers for the socket
              connection between the UI and the exec. This value is clamped to the max allowed by
              the  system.  This  can  fix  a problem where the executive and UI hang involving a
              deadlock situation in the socket communication. The value assigned to it is  passed
              as  the  parameter to setsockopt for SOL_SNDBUF and SOL_RCVBUF. A typcial increased
              value may be 262144.

              Specifies a file containing user interactors for  use  by  the  SuperviseState  and
              SuperviseWindow modules.

              Under  UNIX specifies the web browser to launch for viewing the HTML documentation.
              Under Windows and MacOS X setting this environment variable will launch the systems
              default web browser.


       The next few examples assume that none of the DX environment variables have been set.

       1. To start both the user interface and the executive with the network named
              dx -edit -program cfd

       2.  To  start  and execute the visual program in image mode with /usr/users/me and
       /usr/data as data directories:
              dx -image -execute -data '/usr/users/me:/usr/data' cfd

       3. To run just the executive on the script named f15wing:

              dx -script -file f15wing

       4. To start the user interface and execute the user customized  executive  named  mydxexec
       containing user defined modules described in custom.mdf:

              dx -edit -mdf custom.mdf -exec mydxexec

       5. To start the Data Prompter :

              dx -prompter

       6. To start the Module Builder :

              dx -builder
       7. To start the Tutorial :

              dx -tutorial


       README* - The README file(s) found in the dx
              installation  directory  are  an  added  source  of information.  html/allguide.htm
              contains html versions of the documentation.