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Hi,
I am trying to perform a regression analysis with loop. In each loop, a
linear regression is first performed. Then, the Cook distance is examined.
If all data points have a Cook distance less than 1, the program will exit
the loop. Otherwise, the program will filter data points with Cook
distance larger than 1 and continue to the analysis.
However, my program does not work. Could you please give me a hand? Thank
you very much.
ZYM
The following is my program:
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DEFINE !regresion(num = !tokens(1))
!DO !cnt=1 !TO !num
REGRESSION /VARIABLES = x1, x2, y
/STATISTICS = DEFAULTS
/DEPENDENT = y
/METHOD = ENTER
/SAVE COOK.
SORT CASES BY coo_1.
DO IF (coo_1 < 1 AND $CASENUM = 1).
!BREAK.
END IF.
DO IF coo_1 GT 1.
+ COMPUTE myfilter = 0.
ElSE.
+ COMPUTE myfilter = 1.
END IF.
FILTER BY myfilter.
MATCH FILES FILE = * /DROP coo_1.
!DOEND
!ENDDEFINE.
*//////////////////////////////////////////////.
!regresion num = 100.
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