Centering syntax

Hi - a couple of people have asked about syntax to center a variable. Here it is - you're just creating a new centered variable by subtracting the mean - so that 0 is the mean for the centered variable. This makes interpreting the interaction effects easier (see posts on interactions below...).
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desc var=p1ageent .
EXECUTE .

***from the output from above, find the mean and plug it in here, in place of 65.93.

COMPUTE age_cent = p1ageent - 65.93 .
VARIABLE LABELS age_cent 'P1AGEENT centered around its mean' .
EXECUTE .

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