Re: Inverse normal distribution function in MATRIX

Posted by Jon Peck on Dec 01, 2018; 9:52pm
URL: http://spssx-discussion.165.s1.nabble.com/Inverse-normal-distribution-function-in-MATRIX-tp5737081p5737082.html

 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 <[hidden email]> 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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