High Quality Content by WIKIPEDIA articles! Principal component analysis (PCA) involves a mathematical procedure that transforms a number of possibly correlated variables into a smaller number of uncorrelated variables called principal components. The first principal component accounts for as much of the variability in the data as possible, and each succeeding component accounts for as much of the remaining variability as possible. Depending on the field of application, it is also named the discrete Karhunen–Loeve transform (KLT), the Hotelling transform or proper orthogonal decomposition (POD).

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