Re: Inverse normal distribution function in MATRIX

Posted by Jon Peck on Dec 03, 2018; 8:10pm
URL: http://spssx-discussion.165.s1.nabble.com/Inverse-normal-distribution-function-in-MATRIX-tp5737081p5737086.html

I have reported this to the Pubs folks.  They have been pretty good about promptly fixing problems in the online doc.  As Bruce says, the installed 25.0.0.2 CSR does document these functions, but the Command History section for MATRIX was missed.

On Mon, Dec 3, 2018 at 12:55 PM Bruce Weaver <[hidden email]> wrote:

Thanks Jon.  Indeed, I was not seeing that in a PDF of the CSR manual for
SPSS 25.0.0.0; nor is it showing up in the online (html) version of the CSR
manual here:

https://www.ibm.com/support/knowledgecenter/en/SSLVMB_25.0.0/statistics_reference_project_ddita/spss/base/syn_matrix_matrix_functions.html

But if I open the CSR manual for SPSS 25.0.0.2 via the menu (Help > CSR), I
do see that info.  Here is the full path to finding it, for those who may be
interested.

MATRIX - END MATRIX > COMPUTE statement > MATRIX Functions

And under MATRIX functions, there are two branches:
> MATRIX cumulative distribution functions
> MATRIX inverse distribution functions

HTH.



Jon Peck wrote
> From the Syntax Reference Guide under MATRIX...
>
> IDF.NORMAL. IDF.NORMAL(prob, mean, stddev). Numeric. Returns the value
> from
> the normal
> distribution, with specified mean and standard deviation, for which the
> cumulative probability is prob.
>
> The cdf and idf functions mimic the corresponding functions in the regular
> transformation system.  There is also a PROBIT function that is a special
> case of IDF.NORMAL.
>
> You might have missed this, because there is also a CDFNORMAL function
> that
> doesn't follow the pattern.
>
> I see this in the 25.0.0.2 SRG.  It is also in the Subscription version, I
> think, but would not be in 25.0.0.0 or earlier versions.  If you haven't
> installed fixpack 2, you can find it here
> https://www-945.ibm.com/support/fixcentral/
>
> On Sat, Dec 1, 2018 at 1:19 PM Beckstead, Jason &lt;

> jbeckste@.usf

> &gt;
> wrote:
>
>> Hi All,
>>
>>
>>
>> I am working with the MATRIX-ENDMATRIX procedure. I have a square matrix
>> of probabilities and need to transform each value into a z-score. I note
>> that there is a matrix function: CDFNORM referenced in the syntax guide
>> (this takes z-scores and returns probabilities) but I do not see what I
>> would guess I need, something like “IDFNORM”. Any help would be
>> appreciated.
>>
>>
>>
>> Jason
>>
>>
>>
>> _____________________________________________________________
>>
>>  Jason W. Beckstead, Ph.D.
>>
>>   Associate Professor/Quantitative Methodologist
>>
>>   University of South Florida College of Public Health
>>
>>   13201 Bruce B. Downs Blvd., MDC56, Tampa, FL 33612, USA
>>
>>   Statistical Editor, International Journal of Nursing Studies
>>
>>   phone: [phone]  fax: [phone]
>>
>>   personal website:  http://personal.health.usf.edu/jbeckste/
>>
>>   International Journal of Nursing Studies  http://www.elsevier.com/ijns
>>
>>
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>
> --
> Jon K Peck

> jkpeck@

>
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-----
--
Bruce Weaver
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