SPSSX Discussion

Influence Analysis

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Kgomotso Mahole

Influence Analysis

where in IBM SPSS Statistics 20 can i go to to perform a hat matrix, studentized deleted residuals and cook's distance statistic?

KCMahole

Bruce Weaver

Re: Influence Analysis

Administrator

Have you tried searching for those terms in the Command Syntax Reference Manual?

Kgomotso Mahole wrote

where in IBM SPSS Statistics 20 can i go to to perform a hat matrix, studentized deleted residuals and cook's distance statistic?

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David Marso

Re: Influence Analysis

Administrator

In reply to this post by Kgomotso Mahole

See REGRESSION and GLM.
For the Hat matrix defined as X*INV(X'X)*X' you can use the MATRIX language.
data list /Y X1 to x9 (10F1).
begin data
6246524526
7467677375
8628634856
7365786578
3675836578
3656375676
7823653265
8726785623
7562378562
3876586587
2658365638
5623756782
3657835432
END DATA.
REGRESSION /DEP Y /METHOD ENTER X1 TO X9 / SAVE SDRESID COOK.
MATRIX .
GET Y / VAR Y.
GET X / VAR X1 TO X9.
COMPUTE HAT=X*GINV(T(X)*X)*T(X).
COMPUTE HAT2=X*GINV(X).
PRINT HAT.
PRINT HAT2.
END MATRIX.

Kgomotso Mahole wrote

where in IBM SPSS Statistics 20 can i go to to perform a hat matrix, studentized deleted residuals and cook's distance statistic?

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