center

Name

center — center

Calling Sequence

s=center(x)
s=center(x,'r') or s=center(x,1)
s=center(x,'c') or s=center(x,2)

Parameters

: x: real or complex vector or matrix

Description

This function computes s, the centred version of the numerical matrix x. For a vector or a matrix x, s=center(x) returns in the (i,j) coefficient of the matrix s the value (x(i,j)-xbar), where xbar is the mean of the values of the coefficients of x. s=center(x,'r') (or, equivalently, s=center(x,1)) is the rowwise center reduction of the values of x. It returns in the entry s(i,j) the value (x(i,j)-xbarv(j))(j) with xbarv(j) the mean of the values of the j column. s=center(x,'c') (or, equivalently, s=center(x,2)) is the columnwise center reduction of the values of x. It returns in the entry s(i,j) the value (x(i,j)-xbarh(i))) with xbarh(i) the mean of the values of the i row.

Examples

 
x=[0.2113249  0.0002211 0.6653811;
   0.7560439  0.3303271 0.6283918]
s=center(x)
s=center(x,'r')
s=center(x,'c')

Authors

Carlos Klimann