function [sv,ycanon,xcanon,coeff] = pls(X,Y,stdize)
// Intercorrelations analysis
// X ... data matrix arranged as columns - variables and rows - observations
// Y ... the other group arranged accordingly
// stdize 0 ... made on standardized data (default)
// 1 ... analysis on centered data
// coeff ... coefficients (singular vectors) - columns correspond to individual
// canonical variables, the Y coefficients below X ones
// xcanon ... X canonical variables - linear combinations
// ycanon ... Y canonical variables - linear combinations
// sv ... singular values
// Authors: Lukáš Malec and Jaroslav Poživil
// Date: $2016-01-05$
