Inverse normal distribution function in MATRIX
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Inverse normal distribution function in MATRIX
 
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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: +1.813.974.7667 fax: +1.813.974.4719 personal website: http://personal.health.usf.edu/jbeckste/ International Journal of Nursing Studies http://www.elsevier.com/ijns |
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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 On Sat, Dec 1, 2018 at 1:19 PM Beckstead, Jason <[hidden email]> wrote:
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Re: Inverse normal distribution function in MATRIX
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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: +1.813.974.7667 fax: +1.813.974.4719 >> >> personal website: http://personal.health.usf.edu/jbeckste/ >> >> International Journal of Nursing Studies http://www.elsevier.com/ijns >> >> >> ===================== To manage your subscription to SPSSX-L, send a >> message to > LISTSERV@.UGA > (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 > > > > -- > Jon K Peck > jkpeck@ > > ===================== > To manage your subscription to SPSSX-L, send a message to > LISTSERV@.UGA > (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 ----- -- Bruce Weaver [hidden email] http://sites.google.com/a/lakeheadu.ca/bweaver/ "When all else fails, RTFM." NOTE: My Hotmail account is not monitored regularly. To send me an e-mail, please use the address shown above. -- Sent from: http://spssx-discussion.1045642.n5.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
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Bruce Weaver bweaver@lakeheadu.ca http://sites.google.com/a/lakeheadu.ca/bweaver/ "When all else fails, RTFM." PLEASE NOTE THE FOLLOWING: 1. My Hotmail account is not monitored regularly. To send me an e-mail, please use the address shown above. 2. The SPSSX Discussion forum on Nabble is no longer linked to the SPSSX-L listserv administered by UGA (https://listserv.uga.edu/). |
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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 |
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Correction: although the CSR installed with fixpack2 for 25 documents the new CDF and IDF functions, they are not actually in 25.0.0.2. Currently they are only in Subscription. Presumably they will eventually show up in the non-Subscription version. On Mon, Dec 3, 2018 at 1:10 PM Jon Peck <[hidden email]> wrote:
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