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help for mcenter
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Utility for Centering Variables at Their Mean

        mcenter varlist [if exp] [in range] , [hl(varlist)] [sd(#)]

        varlist = Variable list employs casewise deletion (i.e., variables are
                           centered for the subset of observations that are not
                           missing for all variables in varlist).



Description

This centers variables at their mean and creates new variables, C_varname, with
a mean of zero. New variable names are unique and will append numbers to the
end as needed.  Variable labels specifying the variable is centered (and the
subset the centering was based upon) are attached to the variables.  Use of the
options can center variables at mean +/- some multiple of the sd. C_varnamehi =
C_varname-(sd), C_varnamelo=C_varname-(-sd).

Options

hl(#) specifies variables for which an alternative center is desired.

sd(#) specifies value of alternative center, in sd units, default = 1.0.


Examples

mcenter x y z
mcenter x y z,hl(x)
mcenter x y z,hl(x y) sd(2)


Author

Jeffrey S. Simons - jsimons@usd.edu

Also see

sslope