Description :
Implementation of Tyler, Critchley, Duembgen and Oja\'s (JRSS B, 2009, < doi:10.1111/j.1467-9868.2009.00706.x>) and Oja, Sirkia and Eriksson\'s (AJS, 2006, < https://www.ajs.or.at/index.php/ajs/article/view/vol35,%20no2%263%20-%207>) method of two different scatter matrices to obtain an invariant coordinate system or independent components, depending on the underlying assumptions.
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