Date:         Tue, 10 Dec 1996 17:40:12 -0600
Reply-To:     marso@spss.com
Sender:       "SPSSX(r) Discussion" <SPSSX-L@UGA.CC.UGA.EDU>
From:         David Marso <marso@SPSS.COM>
Organization: SPSS Inc
Subject:      Re: SPSS MAcro syntax: help needed
Content-Type: text/plain; charset=iso-8859-1

EXCELLENT questions.  The macros which ship with the Advanced Statistics
module are intended to be run by using an INCLUDE command to make them
available for invocation in the SPSS session. See the section of the
SPSS
Syntax Reference Guide on Universals : Running SPSS Commands.  You will
find a discussion of Interactive Mode and Batch Mode.  You will also see
reference to the 'extra characters in column one' .  These are useful to
allow intentations of the commands to show programming structure
(nesting
of loops and do if commands etc).  By the way, in SPSS 7.5 the macros
have been
modified to have periods in appropriate places so that one can load them
either using INCLUDE, or by bringing them into a Syntax Window,
selecting
and running the entire command file.  Basically, command terminators
are ok in either interactive or batch mode.  The decision was to place
them
into the macros as there was more than occasional confusion as to the
correct
way to run them.  In addition, portions of CANCORR.SPS have been
rewritten
to permit larger problems to run .  This new version is being
distributed with
Advanced Statistics version 7.5 .
I hope this helps.
David Marso
 
 
 
Hekon Finne wrote:
>
> David Marso <marso@spss.com> wrote:
> >In the SPSS MACRO language, the !IF operator is used to conditionally
> >direct
> >program flow dependent upon values passed to the macro.  !IF is not
> >sensitive
> >to values of variables.
>
> Thank you for the instructive example. I notice from  other examples that are
distributed with the
> software itself that commands to not have a   period  as a command
terminator. Also, some   extra
>  characters pop up in column one (either a dot or a plus), but I cannot
figure out how. Look at
> these two exampes.
>
> Extract from matrix section of cancorr.sps:
>
> loop  #l=1 to n
> +  compute tem=tem*wlam(n-#l+1)
> +  compute df(n-#l+1)=(p1-n+#l)*(p2-n+#l)
> +  compute dof=df(n-#l+1)
> +  compute bart2(n-#l+1)=-(ns-0.5*(p1+p2+3))*ln(tem)
> +  compute chi=bart2(n-#l+1)
> +  compute sig(n-#l+1)=1-chicdf(chi,dof)
> +  compute wilk(n-#l+1)=tem
> end loop
>
> Extract from matrix section of ridgereg.sps:
>
> loop l=1 to iter
>  compute b = inv(xpx+(k &* ident(nv,nv)))*xy
>  compute rsq= 2* t(b)*xy - t(b)*xpx*b
>  compute keep(l,1)=k
>  compute keep(l,2)=rsq
>  compute keep(l,3:(nv+2))=t(b)
>  compute k=k+inc
> end loop
>
> What is the significance of the missing terminators and the extra column one
characters?
>
> Thanks again.
>
> Hekon Finne