wcenter
center and weight
Syntax
s=wcenter(x) s=wcenter(x,'r') or s=wcenter(x,1) s=wcenter(x,'c') or s=wcenter(x,2)
Arguments
x: real or complex vector or matrix
Description
This function computes s, the weighted and centred
version of the numerical matrix x.
For a vector or a matrix x, s=wcenter(x)
returns in the (i,j) coefficient of the matrix
s the value (x(i,j)-xbar)/sigma, where
xbar is the mean of the values of the coefficients of
x and sigma his standard deviation.
s=wcenter(x,'r') (or, equivalently,
s=wcenter(x,1)) is the rowwise centre reduction of
the values of x. It returns in the entry s(i,j)
the value (x(i,j)-xbarv(j))/sigmav(j) with
xbarv(j) the mean of the values of the j
column and sigmav(j) the standard deviation of the
j column of x.
s=wcenter(x,'c') (or, equivalently,
s=wcenter(x,2)) is the columnwise centre reduction of
the values of x. It returns in the entry
s(i,j) the value (x(i,j)-xbarh(i))/sigmah(i) with
xbarh(i) the mean of the values of the i row
and sigmah(i) the standard deviation of the i
row of x.
Examples
x=[0.2113249 0.0002211 0.6653811; 0.7560439 0.3303271 0.6283918] s=wcenter(x) s=wcenter(x,'r') s=wcenter(x,'c')
See also
- center — center
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