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                               File READZYS.TXT
         Downloading and installing ZYSREG and its interface to Splus
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ZYSREG is a library of S functions for the computation of high breakdown and high
efficiency regression with a test for biais according to a method proposed by Yohai,
Zamar and Stahel. ZYSREG requires ROBETH to be loaded into Splus. 

ZYSREG is already integrated in Splus version 5.0 or higher. For further informations,
type the Splus command: help(lmRobMM)
ZYSREG is available at the URL:

          http://www.iumsp.ch/Unites/us/msp_us.htm (=> software)


Downloading
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(a) For Splus 4.x, Splus 2000 or Splus 6.x/Windows, copy the following files
    in a a temporary directory:

    zyswin.exe     (object files, self extracting zip files;   july 1998)
    zyswin_v6.exe  (the same file but for Splus 6.x;         august 2004)
    zysman.exe     (manual, self extracting ps and pdf-files; august 1999)

(b) For R (version >= 1.5.1) / Windows, copy the following file in a temporary
    directory

    zysR_win.exe   (source, self extracting zip file;        august 2003)
    zysman.exe     (manual, self-extracting ps and pdf-file; august 1999)

(c) For Splus 3.1/UNIX (and more recent versions) copy the following files
    in a temporary directory (noted <temp.path> below) :

    zyssrc.tar.Z   (program sources, compressed; july 1997)
    zysman.tar.Z   (manual, compressed ps file;  july 1997)

I) Installation for Splus or R under Windows:
---------------------------------------------

1. Execute the self-extracting file 

   zyswin.exe (or zyswin_v6.exe or zysR_win.exe for R)
 
   The name of the directory where the file will be "unzipped" must 
   be entered. For a standard installation, it is:

             c:\Program Files\sp2000\library 
   or      
             c:\Program Files\splus6\library
   or
             c:\Program Files\R\rwNNN\library

   This path is noted <your.path> afterwards.
   
   Do the same procedure for the file zysman.exe.

   Remark: Installation for Splus 3.x/Windows is no more available.  

 
2. To invoke the library 
   a) under Splus, use the Splus commands:
      > library(robeth,T) 
      > library(zysreg,T)
 
   b) under R, use the R commands:
      > library(robeth)
      > library(ZYSreg) # => Masks some R functions

II) Installation under UNIX:
---------------------------

If you have write access to the Splus HOME directory, the most convenient way 
to install ZYSREG is the creation of a public library. Otherwise create your
private library and skip step 1 below.

1. Change to the Splus HOME directory:

   cd <your Splus HOME dir>/library

2. Create the new directory zysreg. Type:

   mkdir zysreg       

3. Decompress the tar file:

   cd zysreg  
   zcat <temp.path>/zyssrc.tar.Z  | tar xvf -

4. Create the zysreg/.Data sub-directory and the Splus objects:

   If your Splus version is 4.x or lower, type:

   mkdir .Data 

   otherwise (Splus 5.x, Splus 6.x or higher) , type:

   Splus CHAPTER

   Then, type the commands:

   Splus
   > source("zysano.q")
   > source("zysaux.q")
   > source("zyscomp.q")
   > source("zysextr.q")
   > source("zysgen.q")
   > source("zysmes.q")
   > source("zysreg.q")
   > q()

5. To invoke the public library, open Splus and type:

   > library(robeth,T)   
   > library(zysreg,T)
  
6. For a private library, create a file "mylib.q" for example, containing
   the following line:
   assign("lib.loc","<the path to the library>",frame=0)
   In my case, I have: assign("lib.loc", "/users/arandria", frame=0)
   Then after opening Splus, type:

   > source("mylib.q")
   > library(robeth,T)
   > library(zysreg,T)

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