Thank you HallsofIvy. I just meant the physical interpratation only. I want to know where it is practically been put to use. Also I need to know about orthonormal matrices used in PCA(Principal Component Analysis). Suppose if am recording some 100 data and I need to eliminate noise and...
I want to know what orthonormal basis or transformation physically means. Can anyone please explain me with a practical example? I prefer examples as to where it is put to use practically rather than examples with just numbers..