Help With Loop

[Michael Kruger]

I could use some help with a DO REPEAT LOOP program.

I have 500 rows of frequency data for multiple variables that I need to
run the same statistical procedure on ( a log-linear analysis if that's
relevant).
I am using the id variable CASE as my counter (1 to 500). I tried the
following code to test out the loop but cannot get it to run:

INPUT PROGRAM.
 LOOP #I = 1 TO 500.
   Do Repeat TOTAL = Case.
    Compute Total=Case+1.
   End Repeat.
 END LOOP.
END FILE.
END INPUT PROGRAM.

TOTAL is the counting variable that I want to stop at 500. I am not
certain as to where I would put the statiscal command. I assume just
before the
'End Repeat' statement. I must apologize but I am a complete novice in
the use of LOOPS in SPSS. Any advice would be appreicated.

Michael Kruger

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[Richard Ristow]

At 08:20 PM 4/10/2008, Michael Kruger wrote:

>I could use some help with a DO REPEAT LOOP program.
>I am using the id variable CASE as my counter (1 to 500). I tried the
>following code to test out the loop but cannot get it to run:
>
>INPUT PROGRAM.
>LOOP #I = 1 TO 500.
>   Do Repeat TOTAL = Case.
>    Compute Total=Case+1.
>   End Repeat.
>END LOOP.
>END FILE.
>END INPUT PROGRAM.

I'll start with this, but I don't think it's the real problem. You
have a couple of problems with this program:
. When you write data from an INPUT PROGRAM without reading any in,
you need an END CASE statement whenever a case is complete and you
want it to be output.
. In your DO REPEAT, 'TOTAL' is not a variable, but a "stand-in
variable" -- it stands in for every variable in its list, in turn.
So, it won't be in the output file at all.
. As you have it, 'Case' is never assigned any value, so it'll always
be system-missing.  Try the following (I've run it for for 5 cases
only). It works, but I'm not confident it's what you want:
INPUT PROGRAM.
NUMERIC  Case TOTAL (F5).
LEAVE    Case.
LOOP #I = 1 TO 5.
.  COMPUTE Case = #I.
.  COMPUTE Total = Case+1.
.  END CASE.
END LOOP.
END FILE.
END INPUT PROGRAM.
LIST.

List
|-----------------------------|---------------------------|
|Output Created               |10-APR-2008 23:28:11       |
|-----------------------------|---------------------------|
  Case TOTAL

     1     2
     2     3
     3     4
     4     5
     5     6

Number of cases read:  5    Number of cases listed:  5

Now, to what may be the real problem:
>I have 500 rows of frequency data for multiple variables that I need
>to run the same statistical procedure on ( a log-linear analysis if
>that's relevant). I am not certain as to where I would put the
>statistical command. I assume just before the 'End Repeat' statement.

No. A statistical procedure can't be inside either a LOOP/END LOOP or
a DO REPEAT/END REPEAT. Those commands loop across variables, within
each case. They're used in transformation programs and INPUT
PROGRAMS, which process all cases in the file in sequence. A
statistical procedure operates on all the cases in the file.

Can you post more exactly what you want to do? For "multiple
variables that I need to run the same statistical procedure on", you
use a macro loop or a loop in Python. But if you give us your
variables, and how you'd set up the procedure for one of them, we can
be more exact in responding.

-Best of luck,
  Richard

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[Shaw, Karsten]

I am trying to create a bar-chart in SPSS where the width of each bar varies according to a second variable (representing, say, importance or sample size).

SPSS support told me I need to use GPL, something I have no experience of.  Can anyone help please?

Thanks in advance,
Karsten


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[ViAnn Beadle]

Here's an example using the Employee data.sav example data file. Bars are
sized by sample size.

GGRAPH
  /GRAPHDATASET NAME="graphdataset" VARIABLES=jobcat salary
    MISSING=LISTWISE REPORTMISSING=NO
  /GRAPHSPEC SOURCE=INLINE.
BEGIN GPL
  SOURCE: s=userSource(id("graphdataset"))
  DATA: jobcat=col(source(s), name("jobcat"), unit.category())
  DATA: salary=col(source(s), name("salary"))
  GUIDE: axis(dim(1), label("Employment Category"))
  GUIDE: axis(dim(2), label("Mean Current Salary"))
  SCALE: linear(dim(2), include(0))
  ELEMENT: interval(position(summary.mean(jobcat*salary)),
size(summary.count(jobcat)))
END GPL.

For more information go to Help>Base System>GPL Reference

-----Original Message-----
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of
Shaw, Karsten (GfK NOP, UK)
Sent: Friday, April 11, 2008 7:38 AM
To: [hidden email]
Subject: Altering the width of bars in bar charts

I am trying to create a bar-chart in SPSS where the width of each bar varies
according to a second variable (representing, say, importance or sample
size).

SPSS support told me I need to use GPL, something I have no experience of.
Can anyone help please?

Thanks in advance,
Karsten


Consider the environment before printing this email

*****************************************************
Any views or opinions are solely those of the author
and do not necessarily represent those of GfK NOP or
any of its associated companies.
*****************************************************
The information transmitted is intended only for the
person or entity to which it is addressed and may
contain confidential and/or privileged material. If
you are not the intended recipient of this message,
please do not read, copy, use or disclose this
communication and notify the sender immediately.
It should be noted that any review, retransmission,
dissemination or other use of, or taking action in reliance
upon, this information by persons or entities other than
the intended recipient is prohibited.
*****************************************************
Recipients are warned that GfK NOP cannot guarantee that
attachments or enclosures are secure or error-free as
information could be intercepted, corrupted, or contain viruses
*****************************************************
GfK NOP Limited,Ludgate House,245 Blackfriars Road,London SE1 9UL
Place of registration:England and Wales
Company number:2512551
Registered office:GfK NOP Limited,14 New Street,London,EC2M 4HE

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