Sib-pair Command: standardize


ClassAnalysis and data manipulation command
Namestandardize
Arguments <trait> [familywise]

Replace each trait value with its Z-score, ie (x-xbar)/sd, where xbar is the total sample mean, and sd the total sample standard deviation. This can also be performed using the individual's family mean and standard deviation, if the fam keyword is included.

Example:

>> inc williamsex.in
>> mean adjChol
 
Variable        Mean      Stand Dev  Correlations
---------- ------------ ------------ ---------------------
adjChol        187.0217     118.7763 1.00

Number of variables     =      1
No. usable observations =     46      (  76.7%)

>> sta adjChol

Standardizing "adjChol" to mean=0, variance=1.

>>  mean adjChol

Variable        Mean      Stand Dev  Correlations
---------- ------------ ------------ ---------------------
adjChol         -0.0000       1.0000 1.00

Number of variables     =      1
No. usable observations =     46      (  76.7%)

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