Re: Inverse normal distribution function in MATRIX

Posted by Bruce Weaver on Dec 03, 2018; 7:55pm
URL: http://spssx-discussion.165.s1.nabble.com/Inverse-normal-distribution-function-in-MATRIX-tp5737081p5737085.html

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 <

> jbeckste@.usf

> >
> 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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