variance - variance of the values of a vector or matrix
This function computes the variance of the values of a vector or matrix x .
For a vector or a matrix x , s=variance(x) returns in the scalar s the variance of all the entries of x .
s=variance(x,'r') (or, equivalently, s=variance(x,1) ) is the rowwise variance. It returns in each entry of the row vector s the variance of each column of x .
s=variance(x,'c') (or, equivalently, s=variance(x,2) ) is the columnwise standard deviation. It returns in each entry of the column vector s the variance of each row of x .
x=[0.2113249 0.0002211 0.6653811;0.7560439 0.4453586 0.6283918] s=variance(x) s=variance(x,'r') s=variance(x,'c')
Carlos Klimann
Wonacott, T.H. & Wonacott, R.J.; Introductory Statistics, fifth edition, J.Wiley & Sons, 1990.