https://www.mathworks.com/matlabcentral/answers/2178994-modal-decomposition-using-orthogonal-basis
modal decomposition using orthogonal basis - MATLAB Answers - MATLAB Central
modal decomposition using orthogonal basis. Learn more about modal decomposition of signal
orthogonal basismodaldecompositionusingmatlab
https://www.mapleprimes.com/questions/139308-How-To-Check-If-A-Group-Of-Vectors-Is
how to check if a group of vectors is an orthogonal basis - MaplePrimes
how to check