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Re: SPSSX-L Digest - 2 Mar 2008 to 3 Mar 2008 (#2008-63)

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Christine Unson

Re: SPSSX-L Digest - 2 Mar 2008 to 3 Mar 2008 (#2008-63)

Hi everyone,

How do you specify exclude cases pairwise when using 2-step cluster
analysis. I am conducting cluster analysis and am getting the same
results described by Hans Chen. Thank you.

Chris

----- Original Message -----
From: Automatic digest processor <[hidden email]>
Date: Tuesday, March 4, 2008 0:19 am
Subject: SPSSX-L Digest - 2 Mar 2008 to 3 Mar 2008 (#2008-63)
To: Recipients of SPSSX-L digests <[hidden email]>

> There are 25 messages totalling 1253 lines in this issue.
>
> Topics of the day:
>
> 1. Raking or similar sample weighting (2)
> 2. Problem saving data in SPSS14 (2)
> 3. V16 Extensions
> 4. AW: Problem saving data in SPSS14
> 5. confidence intervals (6)
> 6. Non-normal/linear data & regression (3)
> 7. random variables from normal distn (2)
> 8. unbalanced design with empty cells
> 9. Percentiles by group by clause (2)
> 10. copying from variable list to syntax and other issues
> 11. Age / Date (2)
> 12. Repeating row labels in Custom Tables
> 13. Cluster Analysis
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
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> -------------------------------------------------------------------
> ---
>
> Date: Mon, 3 Mar 2008 11:05:42 +0200
> From: vlad simion <[hidden email]>
> Subject: Re: Raking or similar sample weighting
>
> Hi Melike,
>
> This can be done very easy with Quantum (rim weighting procedure)
> or with
> Spss, starting with the 14th version and the Python programmability
> extension. Search the forum for "rim" or "raking" weighting and
> you will
> find some very useful explanations from Jon Peck, regarding the
> implementation of the raking procedure in Spss through Python.
>
> Hth,
> Vlad
>
> On Sat, Mar 1, 2008 at 12:43 AM, Melike Findikoglu <
> [hidden email]> wrote:
>
> > Hi list,
> >
> > I have a question on raking procedure. Actually I have the
> national level
> > contingency table with occupations and industries, from there on
> I want to
> > impute metropolitan area level cell values of job categories per
> industry> provided that I have the marginal totals of the
> contingency table. A
> > statistician told me that I can use this method to impute cell
> numbers for
> > the metropolitan area. Can i ran this or a similar procedure in
> SPSS 16 ?
> > Is
> > there another method in SPSS to perform that?
> >
> > Thank you and enjoy the leap day!
> >
> > Melike
> >
> > =====================
> > To manage your subscription to SPSSX-L, send a message to
> > [hidden email] (not to SPSSX-L), with no body text
> except the
> > command. To leave the list, send the command
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> > INFO REFCARD
> >
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 01:47:55 -0800
> From: Albert-jan Roskam <[hidden email]>
> Subject: Re: Raking or similar sample weighting
>
> Hi all,
>
> I just found an interesting free article about this
> topic. The hyperlink & abstract are below.
>
> Cheers!!
> Albert-Jan
>
> http://www.jos.nu/Articles/abstract.asp?article=192081
>
> Graham Kalton and Ismael Flores-Cervantes (2003).
> Weighting Methods. Journal of Official Statistics,
> Vol.19, No.2,pp. 81-97
>
> Abstract:
> Weighting adjustments are commonly applied in surveys
> to compensate for nonresponse and noncoverage, and to
> make weighted sample estimates conform to external
> values. Recent years have seen theoretical
> developments and increased use of methods that take
> account of substantial amounts of auxiliary
> information in making these adjustments. The article
> uses a simple example to describe such methods as cell
> weighting, raking, generali sed regression estimation,
> logistic regression weighting, mixtures of methods,
> and methods for restricting the range of the resultant
> adjustments. It also discusses how auxiliary variables
> may be chosen for use in the adjustments and describes
> some applications.
>
> Keywords:
> Calibration; generalised regression estimation;
> poststratification; raking; trimming weights.
> --- vlad simion <[hidden email]> wrote:
>
> > Hi Melike,
> >
> > This can be done very easy with Quantum (rim
> > weighting procedure) or with
> > Spss, starting with the 14th version and the Python
> > programmability
> > extension. Search the forum for "rim" or "raking"
> > weighting and you will
> > find some very useful explanations from Jon Peck,
> > regarding the
> > implementation of the raking procedure in Spss
> > through Python.
> >
> > Hth,
> > Vlad
> >
> > On Sat, Mar 1, 2008 at 12:43 AM, Melike Findikoglu <
> > [hidden email]> wrote:
> >
> > > Hi list,
> > >
> > > I have a question on raking procedure. Actually I
> > have the national level
> > > contingency table with occupations and industries,
> > from there on I want to
> > > impute metropolitan area level cell values of job
> > categories per industry
> > > provided that I have the marginal totals of the
> > contingency table. A
> > > statistician told me that I can use this method to
> > impute cell numbers for
> > > the metropolitan area. Can i ran this or a similar
> > procedure in SPSS 16 ?
> > > Is
> > > there another method in SPSS to perform that?
> > >
> > > Thank you and enjoy the leap day!
> > >
> > > Melike
> > >
> > > =====================
> > > To manage your subscription to SPSSX-L, send a
> > message to
> > > [hidden email] (not to SPSSX-L), with
> > no body text except the
> > > command. To leave the list, send the command
> > > SIGNOFF SPSSX-L
> > > For a list of commands to manage subscriptions,
> > send the command
> > > INFO REFCARD
> > >
> >
> > =====================
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> >
>
>
>
>
>

________________________________________________________________________
____________Never miss a thing. Make Yahoo your home page.

> http://www.yahoo.com/r/hs
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 12:02:04 +0000
> From: Marion Nolan <[hidden email]>
> Subject: Problem saving data in SPSS14
>
> Hi
> =20
> Can you help?
> =20
> I need to amend some data entries. I am making the changes in
> accordance w=
> ith the instructions given in the SPSS help for modifying data
> values. Wha=
> t I am finding is that when I press save, close the file and open
> it again =
> the changes are fine however when I close the file then open it
> again the d=
> ata is reverting to the original.
> =20
> For instance;
> =20
> ID number 06 variable name altered to has reverted to
> modetrans 4 1
> timetravel 2 10
> timeweek 3 6
> lengthten 3 8
> =20
> =20
> I've tried deleting the whole row and inserting new cases but it
> is still r=
> everting to the original.
> =20
> I can verify that this is happening for a cluster of 6 data
> entries but hav=
> en't been able to establish the extent of the data saving problems.
> =20
> Has you had this problem?
> =20
> How have you fixed it?
> =20
> Thank you
> =20
> Marion
> =20
> =20
> =20
> =20
> =20
> =20
> =20
> =20
> Marion
> _________________________________________________________________
> Get Hotmail on your mobile, text MSN to 63463!
> http://mobile.uk.msn.com/pc/mail.aspx=
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 08:32:43 -0500
> From: "Statman (WMB)" <[hidden email]>
> Subject: Re: V16 Extensions
>
> Got it
>
> Tks to all
>
>
> -----Original Message-----
> From: SPSSX(r) Discussion [mailto:[hidden email]] On
> Behalf Of
> Reutter, Alex
> Sent: Sunday, March 02, 2008 11:57 PM
> To: [hidden email]
> Subject: Re: V16 Extensions
>
> I was able to obtain the help text below by:
>
> 1. Installing the Python Integration Plugin 2. Copying text.xml to the
> \extensions subdirectory of the SPSS 16 installation directory 3.
> CopyingTEXT.py to the \Lib\site-packages subdirectory of the
> Python 2.5
> installation directory 4. Executing TEXT /HELP. in a syntax window.
>
> If I don't follow step 3, on step 4 I receive the error "Extension
> commandTEXT could not be loaded. The module or a module that it
> requires may be
> missing, or there may be syntax errors in it." If that's what you're
> getting, then for some reason SPSS can't find TEXT.py.
>
> Alex
>
>
> TEXT list-of-strings
> [/OUTLINE TITLE=text]
> [/HELP]
>
> Example:
> TEXT 'the first line of text'
> 'the second line of text'
> /OUTLINE TITLE='Note to Reader'.
>
> The text is inserted in a new textblock in the Viewer. Each
> quoted string
> is a single line. If no strings are supplied, an empty comment
> will be
> created.
> There must be a nonempty dataset open before this command can be used.
>
> The text appears under the Outline heading "Comment".
> /HELP displays this text and does nothing else.
>
>
>
> -----Original Message-----
> From: SPSSX(r) Discussion [mailto:[hidden email]] On
> Behalf Of
> Statman (WMB)
> Sent: Thursday, February 28, 2008 3:02 PM
> To: [hidden email]
> Subject: V16 Extensions
>
> OK, I thought it about time to remove my statistical hat and
> "attempt" to
> learn Python starting with the extensions before I got too serious :)
>
> This isn't going well so it must, by definition for me, be pretty
> simple.
> For example, the TEXT extension readme says "type text /help for
> the full
> syntax". Sounds simple so I type "TEXT /HELP." in the syntax
> editor and RUN
> but get an error and it can't be loaded.
>
> What am I missing?
>
> W
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text
> except the
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> list of
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>
> =====================
> To manage your subscription to SPSSX-L, send a message to
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> list of
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>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 17:07:21 +0100
> From: la volta statistics <[hidden email]>
> Subject: AW: Problem saving data in SPSS14
>
> Hi Marion,
>
> try to solve the problem with some syntax command:
> e.g. (not tested:
>
> DO IF ID = '06'.
> - RECODE modetrans (1 = 4).
> - RECODE timetravel (10 = 2).
> - RECODE timeweek (6 = 3).
> - RECODE lengthten (8 = 3).
> END IF.
> EXEC.
>
> Hope this helps, Christian
>
> -----Ursprüngliche Nachricht-----
> Von: SPSSX(r) Discussion [mailto:[hidden email]]Im
> Auftrag von
> Marion Nolan
> Gesendet: Montag, 3. März 2008 13:02
> An: [hidden email]
> Betreff: Problem saving data in SPSS14
>
>
> Hi
>
> Can you help?
>
> I need to amend some data entries. I am making the changes in
> accordancewith the instructions given in the SPSS help for
> modifying data values.
> What I am finding is that when I press save, close the file and
> open it
> again the changes are fine however when I close the file then open
> it again
> the data is reverting to the original.
>
> For instance;
>
> ID number 06 variable name altered to has reverted to
> modetrans 4 1
> timetravel 2 10
> timeweek 3 6
> lengthten 3 8
>
>
> I've tried deleting the whole row and inserting new cases but it
> is still
> reverting to the original.
>
> I can verify that this is happening for a cluster of 6 data
> entries but
> haven't been able to establish the extent of the data saving problems.
>
> Has you had this problem?
>
> How have you fixed it?
>
> Thank you
>
> Marion
>
>
>
>
>
>
>
>
> Marion
> Get Hotmail on your mobile, text MSN to 63463!
> http://mobile.uk.msn.com/pc/mail.aspx
> =======
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text
> except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 08:35:56 -0800
> From: jimjohn <[hidden email]>
> Subject: confidence intervals
>
> if I have a mean and a standard deviation of a variable, then I
> can say I am
> 95% confident the mean will not go up by more than 1.645 * StDEV.
>
> can someone plz tell me what this 1.645 number would be for 98 and
> 99 %
> confidence. thanks so much.
> --
> View this message in context: http://www.nabble.com/confidence-
> intervals-tp15807790p15807790.html
> Sent from the SPSSX Discussion mailing list archive at Nabble.com.
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 08:42:02 -0800
> From: jimjohn <[hidden email]>
> Subject: Re: confidence intervals
>
> does it ever get as high as 4/5 standard deviations, that I could
> say maybe
> im 99.5% confident the mean will not go up by more than 4/5 standard
> deviations.
>
>
> jimjohn wrote:
> >
> > if I have a mean and a standard deviation of a variable, then I
> can say I
> > am 95% confident the mean will not go up by more than 1.645 * StDEV.
> >
> > can someone plz tell me what this 1.645 number would be for 98
> and 99 %
> > confidence. thanks so much.
> >
>
> --
> View this message in context: http://www.nabble.com/confidence-
> intervals-tp15807790p15807944.html
> Sent from the SPSSX Discussion mailing list archive at Nabble.com.
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 10:44:01 -0600
> From: Melissa Ives <[hidden email]>
> Subject: Re: Problem saving data in SPSS14
>
> How are you saving the file? It looks like you are using the Save File
> Icon on the toolbar.
> How are you re-opening it (both times)?
>
> Could it be that you are some how saving to a different location?
> I ask this because I have never seen this kind of behavior.
> Check your 'Notes' output to see the full path of the file each
> time--or
> better yet, set your options to show commands in output--then you will
> see what happens at each step.
>
> Melissa
>
> -----Original Message-----
> From: SPSSX(r) Discussion [mailto:[hidden email]] On
> Behalf Of
> Marion Nolan
> Sent: Monday, March 03, 2008 6:02 AM
> To: [hidden email]
> Subject: [SPSSX-L] Problem saving data in SPSS14
>
> Hi
>
> Can you help?
>
> I need to amend some data entries. I am making the changes in
> accordance with the instructions given in the SPSS help for modifying
> data values. What I am finding is that when I press save, close the
> file and open it again the changes are fine however when I close the
> file then open it again the data is reverting to the original.
>
> For instance;
>
> ID number 06 variable name altered to has reverted to
> modetrans 4 1
> timetravel 2 10
> timeweek 3 6
> lengthten 3 8
>
>
> I've tried deleting the whole row and inserting new cases but it is
> still reverting to the original.
>
> I can verify that this is happening for a cluster of 6 data
> entries but
> haven't been able to establish the extent of the data saving problems.
>
> Has you had this problem?
>
> How have you fixed it?
>
> Thank you
>
> Marion
>
>
>
>
>
>
>
>
> Marion
> _________________________________________________________________
> Get Hotmail on your mobile, text MSN to 63463!
> http://mobile.uk.msn.com/pc/mail.aspx
> =======
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text
> except the
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> listof commands to manage subscriptions, send the command INFO REFCARD
>
>
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> ------------------------------
>
> Date: Mon, 3 Mar 2008 12:34:04 -0600
> From: Sara House <[hidden email]>
> Subject: Re: confidence intervals
>
> You should be able to find these numbers in a standard z table.
>
> Sara House
> [hidden email]
>
> >>> jimjohn <[hidden email]> 03/03/08 10:35 AM >>>
> if I have a mean and a standard deviation of a variable, then I
> can say I am
> 95% confident the mean will not go up by more than 1.645 * StDEV.
>
> can someone plz tell me what this 1.645 number would be for 98 and
> 99 %
> confidence. thanks so much.
> --
> View this message in context: http://www.nabble.com/confidence-
> intervals-tp15807790p15807790.html
> Sent from the SPSSX Discussion mailing list archive at Nabble.com.
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text
> except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 10:59:35 -0800
> From: King Douglas <[hidden email]>
> Subject: Re: confidence intervals
>
> JimJohn,
>
> Are you basing your estimate on a sample of the population? or on
> the population itself? What do you mean by "the mean will not go
> up"? Is there any chance that the mean could go down?
>
> These things matter.
>
> King Douglas
> American Airlines Customer Research
>
> Sara House <[hidden email]> wrote: You should be able to find
> these numbers in a standard z table.
>
> Sara House
> [hidden email]
>
> >>> jimjohn 03/03/08 10:35 AM >>>
> if I have a mean and a standard deviation of a variable, then I
> can say I am
> 95% confident the mean will not go up by more than 1.645 * StDEV.
>
> can someone plz tell me what this 1.645 number would be for 98 and
> 99 %
> confidence. thanks so much.
> --
> View this message in context: http://www.nabble.com/confidence-
> intervals-tp15807790p15807790.html
> Sent from the SPSSX Discussion mailing list archive at Nabble.com.
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text
> except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text
> except the
> command. To leave the list, send the command
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> For a list of commands to manage subscriptions, send the command
> INFO REFCARD
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 19:35:58 -0000
> From: Julius Sim <[hidden email]>
> Subject: Re: confidence intervals
>
> Not quite sure I understand the question!
>
> The confidence interval is defined in relation to the population
> parameter; it is a (normally) symmetrical range of values with a
> statedprobability of containing the population value (in this
> case, the
> population mean), estimated from a sample dawn from this population.
>
> Hence it involves the standard error rather than the standard
> deviation.Moreover, the population parameter is fixed, and it is
> not therefore clear
> what is meant by its 'going up'. If the population parameter
> changes it is
> no longer the one that you were estimating! The sample mean may change
> (e.g. in a before-and-after experiment), in which case you would
> want a
> confidence interval for the mean such change in the population, which
> again would be a question of estimating a fixed quantity.
>
> Regards,
>
> Julius
>
>
>
> > if I have a mean and a standard deviation of a variable, then I
> can say I
> > am
> > 95% confident the mean will not go up by more than 1.645 * StDEV.
> >
> > can someone plz tell me what this 1.645 number would be for 98
> and 99 %
> > confidence. thanks so much.
> > --
> > View this message in context:
> > http://www.nabble.com/confidence-intervals-tp15807790p15807790.html
> > Sent from the SPSSX Discussion mailing list archive at Nabble.com.
> >
> > =====================
> > To manage your subscription to SPSSX-L, send a message to
> > [hidden email] (not to SPSSX-L), with no body text
> except the
> > command. To leave the list, send the command
> > SIGNOFF SPSSX-L
> > For a list of commands to manage subscriptions, send the command
> > INFO REFCARD
> >
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 11:40:55 -0800
> From: A Seifert <[hidden email]>
> Subject: Non-normal/linear data & regression
>
> Hi all,
>
> Could anyone provide me with a "best practices" approach to
> analyzing non-normal and/or non-linear data with regression?
> Specifically, I know that some use data transformations (log,
> square root, etc.), but before I take this, or any other approach,
> I'd like to make sure that I've got a good grasp on the pros/cons
> of each approach. Any information or good outside sources would
> be greatly appreciated.
>
> Thanks much!
> April
>
>
>
>
>
>

________________________________________________________________________
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> ------------------------------
>
> Date: Mon, 3 Mar 2008 11:51:41 -0800
> From: jimjohn <[hidden email]>
> Subject: Re: confidence intervals
>
> Ok well heres what I'm doing. I have a variable rate and another
> variableincentive. i do linear regression with rate as the
> dependent variable. now
> what im trying to do is estimate how much of the rate is
> completely not
> affected by changes to incentive. ie maybe the rate overall is
> 18%, but only
> 4/5% is not affected at all by incentive. so what i plan to do is
> see what
> will happen if incentive goes down by some number of standard
> deviationsfrom the mean, then i plug that new incentive value into
> the regression
> equation to get a conservative estimate of my core rate not
> affected at all
> by incentive. the incentive could go up too, but i just want to
> estimatewhat will happen when it goes down. if it goes up, the
> rate will be even
> more. so i know from what was done before that if i lower the rate
> by 1.645
> stdev, and then find my rates this will be 95% confidence. plz
> correct me if
> that is wrong or any toher advice. thx.
>
>
>
> King Douglas wrote:
> >
> > JimJohn,
> >
> > Are you basing your estimate on a sample of the population? or
> on the
> > population itself? What do you mean by "the mean will not go
> up"? Is
> > there any chance that the mean could go down?
> >
> > These things matter.
> >
> > King Douglas
> > American Airlines Customer Research
> >
> > Sara House <[hidden email]> wrote: You should be able to find these
> > numbers in a standard z table.
> >
> > Sara House
> > [hidden email]
> >
> >>>> jimjohn 03/03/08 10:35 AM >>>
> > if I have a mean and a standard deviation of a variable, then I
> can say I
> > am
> > 95% confident the mean will not go up by more than 1.645 * StDEV.
> >
> > can someone plz tell me what this 1.645 number would be for 98
> and 99 %
> > confidence. thanks so much.
> > --
> > View this message in context:
> > http://www.nabble.com/confidence-intervals-tp15807790p15807790.html
> > Sent from the SPSSX Discussion mailing list archive at Nabble.com.
> >
> > =====================
> > To manage your subscription to SPSSX-L, send a message to
> > [hidden email] (not to SPSSX-L), with no body text
> except the
> > command. To leave the list, send the command
> > SIGNOFF SPSSX-L
> > For a list of commands to manage subscriptions, send the command
> > INFO REFCARD
> >
> > =====================
> > To manage your subscription to SPSSX-L, send a message to
> > [hidden email] (not to SPSSX-L), with no body text
> except the
> > command. To leave the list, send the command
> > SIGNOFF SPSSX-L
> > For a list of commands to manage subscriptions, send the command
> > INFO REFCARD
> >
> > =====================
> > To manage your subscription to SPSSX-L, send a message to
> > [hidden email] (not to SPSSX-L), with no body text
> except the
> > command. To leave the list, send the command
> > SIGNOFF SPSSX-L
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> > INFO REFCARD
> >
> >
>
> --
> View this message in context: http://www.nabble.com/confidence-
> intervals-tp15807790p15812217.html
> Sent from the SPSSX Discussion mailing list archive at Nabble.com.
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 11:52:50 -0800
> From: jimjohn <[hidden email]>
> Subject: random variables from normal distn
>
> can someone plz tell me how to use the random num generator to
> generatevariables from a normal distribution. for example, if i
> know the mean and
> standard deviationa nd want to generate 30 nums.
> --
> View this message in context: http://www.nabble.com/random-
> variables-from-normal-distn-tp15812244p15812244.html
> Sent from the SPSSX Discussion mailing list archive at Nabble.com.
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 15:03:35 -0500
> From: Mathew Chandler <[hidden email]>
> Subject: unbalanced design with empty cells
>
> I have an unbalanced design with empty cells, so I've determined
> that I
> need to run a linear mixed model. I've run the analyses, and I'm
> confident that I executed them properly, but I'm not sure I
> specified the
> appropriate repeated covariance type. I also need to run binary
> logisticregression analyses on some other data for this project,
> and I've never
> used this analysis before.
>
> Can anyone suggest a good resource to check my methodology?
>
> Mathew Chandler
> Computing Consultant-Client Support & Services
> I.T. Services
> University of Windsor
> Windsor, Ontario, Canada
> N9B 3P4
> (519) 253-3000 ext. 2768
> [hidden email]
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 21:05:54 +0100
> From: "Kooij, A.J. van der" <[hidden email]>
> Subject: Re: Non-normal/linear data & regression
>
> see chapter 1 at
> https://openaccess.leidenuniv.nl/handle/1887/12096
> =20
> Regards,
> Anita van der Kooij
> Data Theory Group
> Leiden University
>
> ________________________________
>
> From: SPSSX(r) Discussion on behalf of A Seifert
> Sent: Mon 03/03/2008 20:40
> To: [hidden email]
> Subject: Non-normal/linear data & regression
>
>
>
> Hi all,
>
> Could anyone provide me with a "best practices" approach to
> analyzing non-n=
> ormal and/or non-linear data with regression? Specifically, I
> know that so=
> me use data transformations (log, square root, etc.), but before I
> take thi=
> s, or any other approach, I'd like to make sure that I've got a
> good grasp =
> on the pros/cons of each approach. Any information or good
> outside sources=
> would be greatly appreciated.
>
> Thanks much!
> April
>
>
>
>
>
>

_____________________________________________________________________=__
_____________

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> ------------------------------
>
> Date: Mon, 3 Mar 2008 12:09:15 -0800
> From: Nagaraju Thogiti <[hidden email]>
> Subject: Percentiles by group by clause
>
> Hi,
>
> =20
>
> How do I get percentiles of a scaled variable group by another
> categorical variable? For example, I have categorical variable A
> (whichtakes 10 values within), and I want to get percentiles of a
> scaledvariable Y aggregated by variable A. So, for each value of
> A, I want
> percentiles of Y.
>
> =20
>
> Thank you,
>
> Nagu
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 20:23:58 +0000
> From: David Hitchin <[hidden email]>
> Subject: Re: Non-normal/linear data & regression
>
> Quoting A Seifert <[hidden email]>:
> > Could anyone provide me with a "best practices" approach to
> analyzing> non-normal and/or non-linear data with regression?
> Specifically, I
> > know that some use data transformations (log, square root,
> etc.), but
> > before I take this, or any other approach, I'd like to make sure
> that> I've got a good grasp on the pros/cons of each approach. Any
> > information or good outside sources would be greatly appreciated.
> >
> First of all, NONE of the variables, dependent or independent need
> to be
> normally distributed. What IS required is that when you have
> fitted a
> regression, the errors of estimation, i.e. the "residuals" are
> normallydistributed.
>
> The first thing that you have to sort out is the LINEARITY of the
> regression. The key to this is sometimes plotting the original
> variables, but if you are doing multiple regression, i.e. more
> than one
> independent variable, then it is difficult to produce plots which show
> how the combinations of variables interact. In this case you plot the
> residuals and check these for linearity. If they fail, then the plots
> may give you some idea of what to try, and you transform some or
> all of
> the X variables (that is the independent ones).
>
> Transformations such as square roots reduce the smaller variables to
> some extent, but reduce the larger values much more. Other variables,
> such as reciprocals, have the biggest effect on the smaller values.
>
> The other thing that you want to achieve is to get residuals about the
> same size all the way along the regression line. If, for example, the
> largest residuals occur against the largest Y values, you will
> need to
> transform the Y variable.
>
> You may need to tinker with transformations both on the X
> variables and
> the Y variables before you get both linearity and constant expected
> sizes for the residuals.
>
> Again, KEEP PLOTTING residuals and LOOKING at the plots. Beginners
> oftenspend too much time worrying about the numerical results,
> which at best
> only tell you that something is wrong, while the plots both show
> what is
> wrong and give you ideas about what to do to put things right.
>
> Now, just to tidy things up, we need to distinguish between
> regressionswhich are "linear in the parameters" and those which
> are inherently
> non-linear. You may find that some theoretical models, e.g.
> y = a + b * sqrt (x) can be linearised by transforming variables, as
> when y = c + d * x*x.
>
> Others, such as y = a + b to the power of x cannot be handled in this
> way, and need non-linear regression methods. These are not easy
> for the
> beginner, and often not easy for anyone.
>
> David Hitchin
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 14:28:45 -0500
> From: mp <[hidden email]>
> Subject: copying from variable list to syntax and other issues
>
> I am having a couple problems I never encountered before I began using
> SPSS 16:
> -- for no apparent reason sometimes I am unable to copy variable
> namesfrom the variable view into a syntax file.
> -- sometimes I am unable to copy output from one file and paste
> it into
> the output of another file (both SPSS 16 outputs).
>
> Anyone else having these problems?
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 13:48:59 -0800
> From: jimjohn <[hidden email]>
> Subject: Re: Percentiles by group by clause
>
> just split file by your variable A. then go to analyze ->
> frequency and it
> will display Y's percentiles output for each value of A.
>
>
> Nagaraju Thogiti wrote:
> >
> > Hi,
> >
> >
> >
> > How do I get percentiles of a scaled variable group by another
> > categorical variable? For example, I have categorical variable A
> (which> takes 10 values within), and I want to get percentiles of
> a scaled
> > variable Y aggregated by variable A. So, for each value of A, I want
> > percentiles of Y.
> >
> >
> >
> > Thank you,
> >
> > Nagu
> >
> > ====================To manage your subscription to SPSSX-L, send
> a message
> > to
> > [hidden email] (not to SPSSX-L), with no body text
> except the
> > command. To leave the list, send the command
> > SIGNOFF SPSSX-L
> > For a list of commands to manage subscriptions, send the command
> > INFO REFCARD
> >
> >
>
> --
> View this message in context: http://www.nabble.com/Percentiles-by-
> group-by-clause-tp15812912p15814885.html
> Sent from the SPSSX Discussion mailing list archive at Nabble.com.
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 22:34:26 +0000
> From: "Nyougo Omae." <[hidden email]>
> Subject: Age / Date
>
> Hello,
>
> I have a dataset with an age variable entered as yy:mm:dd that I
> would like to convert to months. When I checked through the 'help'
> section in SPSS, this doesn't appear as one of the date formats (
> I was hoping I could find this there). Please help.
>
> Thank you.
> Nyougo.
>
> ------------------------------
>
> Date: Tue, 4 Mar 2008 10:05:18 +1100
> From: Jason Burke <[hidden email]>
> Subject: Re: Age / Date
>
> To extract the MM from the variable age, use the following command:
>
> COMPUTE MonthOfYear = XDATE.MONTH(age) .
> EXECUTE.
>
> HTH,
>
>
> Jason
>
> On 3/4/08, Nyougo Omae. <[hidden email]> wrote:
> > Hello,
> >
> > I have a dataset with an age variable entered as yy:mm:dd that I
> would like to convert to months. When I checked through the 'help'
> section in SPSS, this doesn't appear as one of the date formats (
> I was hoping I could find this there). Please help.
> >
> > Thank you.
> > Nyougo.
> >
> > =====================
> > To manage your subscription to SPSSX-L, send a message to
> > [hidden email] (not to SPSSX-L), with no body text
> except the
> > command. To leave the list, send the command
> > SIGNOFF SPSSX-L
> > For a list of commands to manage subscriptions, send the command
> > INFO REFCARD
> >
>
> ------------------------------
>
> Date: Tue, 4 Mar 2008 10:16:46 +1100
> From: Jason Burke <[hidden email]>
> Subject: Re: random variables from normal distn
>
> This command syntax should help you create a dataset with 3 variables,
> each with 30 cases. Each variable will feature a normal distribution
> with a mean of 7.8 and a standard deviation of 1.3 :
>
> NEW FILE .
> INPUT PROGRAM .
> VECTOR x (3, f3) .
> LOOP #i = 1 to 30.
> LOOP #p = 1 to 3.
> COMPUTE x(#p) = RND(RV.NORMAL(7.8,1.3)) .
> END LOOP .
> END CASE .
> END LOOP .
> END FILE .
> END INPUT PROGRAM .
> EXECUTE .
>
>
>
>
> On 3/4/08, jimjohn <[hidden email]> wrote:
> > can someone plz tell me how to use the random num generator to
> generate> variables from a normal distribution. for example, if i
> know the mean and
> > standard deviationa nd want to generate 30 nums.
> > --
> > View this message in context: http://www.nabble.com/random-
> variables-from-normal-distn-tp15812244p15812244.html
> > Sent from the SPSSX Discussion mailing list archive at Nabble.com.
> >
> > =====================
> > To manage your subscription to SPSSX-L, send a message to
> > [hidden email] (not to SPSSX-L), with no body text
> except the
> > command. To leave the list, send the command
> > SIGNOFF SPSSX-L
> > For a list of commands to manage subscriptions, send the command
> > INFO REFCARD
> >
>
> ------------------------------
>
> Date: Mon, 3 Mar 2008 18:18:49 -0500
> From: Nick Turner <[hidden email]>
> Subject: Repeating row labels in Custom Tables
>
> Hi folks
>
> Does anybody know of a way to list the row labels on every line of a
> custom table? I have several nested variables in the rows of a Custom
> Table and I want to have the higher (left most) variables repeated on
> everyline. ie not just listed once for when a new value is there.
>
> Instead of:
> Car Red 7
> Blue 2
> Green 4
>
> I want:
> Car Red 7
> Car Blue 2
> Car Green 4
>
> Any Tips or Suggestions would be appreciated.
>
> Thanks
>
> ------------------------------
>
> Date: Tue, 4 Mar 2008 10:33:19 +1100
> From: Jason Burke <[hidden email]>
> Subject: Re: Cluster Analysis
>
> The input cases into the cluster analysis must be complete, unless you
> specify otherwise. By default, if any one of the 18 variables features
> a missing value, the procedure will omit the case (unless you specify
> otherwise).
>
> The warning suggests that there are no cases with non-missing values.
>
> To assess the problem, this syntax may assist you:
>
> COUNT incomplete = Q1 Q2A Q2B Q3 Q14 Q15 N24 Q25 Q36 N39 Q41 Q47 Q48
> Q49 Q52 Q51 N53 Q54 (MISSING) .
> FREQUENCIES incomplete .
>
> We use SPSS to create a variable (incomplete) which determines if any
> of the input variables features a (user-defined or system) missing
> value....
>
> HTH,
>
>
> Jason
>
>
> On 2/29/08, Hans Chen <[hidden email]> wrote:
> > Dear Listers:
> >
> >
> >
> > I am going to conduct segmentation analysis using the Twestep
> Cluster in
> > SPSS, but SPSS warned that there are not enough valid cases to
> conduct the
> > specified cluster analysis and this command is not executed.
> Attached is my
> > data and syntax for your reference. Could you please show me how
> to fix the
> > issue using SPSS or SAS. Thanks for your help!
> >
> >
> >
> > Hans Chen
> >
> >
> >
> >
> >
> > TWOSTEP CLUSTER
> >
> > /CATEGORICAL VARIABLES = Q1 Q2A Q2B Q3 Q14 Q15 N24 Q25 Q36 N39
> Q41 Q47 Q48
> > Q49 Q52 Q51 N53 Q54
> >
> > /DISTANCE LIKELIHOOD
> >
> > /NUMCLUSTERS AUTO 15 BIC
> >
> > /HANDLENOISE 25
> >
> > /MEMALLOCATE 64
> >
> > /CRITERIA INITHRESHOLD (0) MXBRANCH (8) MXLEVEL (3)
> >
> > /PLOT
> >
> > VARCHART COMPARE BYVAR NONPARAMETRIC
> >
> > /PRINT COUNT SUMMARY
> >
> > /SAVE VARIABLE=TSC_8059 .
> >
> > AIM TSC_8059
> >
> > /CATEGORICAL Q1 Q2A Q2B Q3 Q14 Q15 N24 Q25 Q36 N39 Q41 Q47 Q48
> Q49 Q52 Q51
> > N53 Q54
> >
> > /PLOT IMPORTANCE (X=VARIABLE Y=PVALUE)
> >
> > /CRITERIA ADJUST=BONFERRONI SHOWREFLINE=NO HIDENOTSIG=NO .
> >
> >
> >
> > *
> > Warnings*
> >
> > * *
> >
> > There are not enough valid cases to conduct the specified
> cluster analysis.
> >
> > This command is not executed.
> >
> >
> >
> > *
> > Warnings*
> >
> > * *
> >
> > Text: TSC_8059
> >
> > An undefined variable name, or a scratch or
> system variable
> > was specified in a variable list which accepts only standard
> variables. Check
> > spelling and verify the existence of this variable.
> >
> > This command not executed.
> >
> > =====================
> > To manage your subscription to SPSSX-L, send a message to
> > [hidden email] (not to SPSSX-L), with no body text
> except the
> > command. To leave the list, send the command
> > SIGNOFF SPSSX-L
> > For a list of commands to manage subscriptions, send the command
> > INFO REFCARD
> >
>
> ------------------------------
>
> End of SPSSX-L Digest - 2 Mar 2008 to 3 Mar 2008 (#2008-63)
> ***********************************************************
>

=====================
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