Date: Sat, 12 May 2007 08:01:02 -0500
Reply-To: "Beadle, ViAnn" <viann@spss.com>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: "Beadle, ViAnn" <viann@spss.com>
Subject: Re: how to compute mean of one variable
In-Reply-To: <137506.75061.qm@web32707.mail.mud.yahoo.com>
Content-Type: text/plain; charset="US-ASCII"
Search for What's New in Help--You'll find a topic for every release going back about release 7.
-----Original Message-----
From: Albert-jan Roskam [mailto:fomcl@yahoo.com]
Sent: Saturday, May 12, 2007 5:14 AM
To: Beadle, ViAnn; SPSSX-L@LISTSERV.UGA.EDU
Subject: Re: how to compute mean of one variable
Wow, is the MODE=ADDVARIABLES new? I've been using v11
for a long time, but recently we upgraded to v14. I
never knew about this feature. VERY HANDY!
More generally, is there a "What's knew" document for
each new release of SPSS?
Albert-Jan
--- "Beadle, ViAnn" <viann@spss.com> wrote:
> Use AGGREGATE to do this. Since AGGREGATE expects a
> break variable, create a constant variable and break
> on that.
> 1. First compute your constant variable with:
>
> COMPUTE constant=1.
>
> Then go to Data>Aggregate.
>
> Add the constant as your break variable and y as
> your aggregated variable. Make sure to check the
> third radio button in the Save group box. Paste or
> run the syntax which will look like this:
>
> AGGREGATE
> /OUTFILE=* MODE=ADDVARIABLES
> /BREAK=constant
> /y_mean=MEAN(y).
>
> The MODE=ADDVARIABLES keyword is the critical thing
> that adds that mean back as a new variable to the
> active file.
>
> -----Original Message-----
> From: SPSSX(r) Discussion
> [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of
> LUCINDA M TEAR
> Sent: Friday, May 11, 2007 7:19 PM
> To: SPSSX-L@LISTSERV.UGA.EDU
> Subject: how to compute mean of one variable
>
> Hello,
>
> I am sorry to bother you all with such a simple
> question, but I do not seem to be able to understand
> from documentation how to compute the mean of a
> variable so that it becomes available to me as a
> constant.
>
> I would like to be able to compute x = mean(variable
> y) but do not seem to be able to figure out how to
> loop through the cases of a variable to either sum
> or average or count them. It seems that arithmetic
> functions apply only across variables within a case.
> I have tried to use the aggregate function, but
> since I want the mean of an entire variable (not by
> any break variable), the command won't process.
> From what I can tell, the index for vectors refers
> to an entire vector and not to a case within a
> vector.
>
> I am sure that this is very simple and I really
> apologize for being so unable to crack the
> documentation about it. It probably requires a
> macro and I am still struggling with these...
>
> Thank you for any pointers (even to previous list
> answers.).
>
> Lucinda Tear
>
Cheers!
Albert-Jan
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Did you know that 87.166253% of all statistics claim a precision of results that is not justified by the method employed? [HELMUT RICHTER]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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