SPSS® 12.0 Command Syntax Reference

Figure D.14 !CORRTST macro with list-processing loop
DEFINE !CORRTST (R = !TOKENS(1)
/N = !TOKENS(1)
/P = !CMDEND).
- INPUT PROGRAM.
- END CASE.
- END FILE.
- END INPUT PROGRAM.
!DO !I !IN (!P).
- COMPUTE #ZR = .5* (LN ((1 + !R) / (1 - !R))).
- COMPUTE #ZP = .5* (LN ((1 + !I) / (1 - !I))).
- COMPUTE Z = (#ZR-#ZP)/(1/(SQRT(!N-3))).
Using the Macro Facility 1727
- COMPUTE PROB=2*(1-CDFNORM(ABS(Z))).
- FORMAT PROB(F8.3).
- TITLE SAMPLE R=!R, N=!N, POPULATION COEFFICIENT=!I.
- LIST.
!DOEND.
!ENDDEFINE.
!CORRTST R=.66 N=30 P=.20 .40 .60 .80 .85 .90.
• As in Figure D.12, DEFINE names the macro as !CORRTST and declares arguments for
the sample correlation coefficient (R), the sample size (N), and the population correlation
coefficient (P).
• !TOKENS(1) specifies that the value of an argument is a string that follows the name of
the argument in the macro call. Thus, the macro call specifies the value of R as 0.66 and
N as 0.30.
• !CMDEND indicates that the value for P is the remaining text in the macro call. Thus
the value of P is a list containing the elements 0.20, 0.40, 0.60, 0.80, 0.85, and 0.90.
• Commands !DO !IN and !DOEND define a list-processing loop. Commands in the loop
compute one Z statistic for each element in the list of population coefficients. For
example, in the first iteration Z is computed using 0.20 as the population coefficient. In
the second iteration 0.40 is used. The same sample size (30) and r value (0.66) are used
for each Z statistic.
• The output from the macro call is shown in Figure D.15. One Z statistic is displayed for
each population coefficient.