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...ame error occurs with the other functions. What does this mean and how can I perform the robust PCA with these functions by using a quadratic matrix as input? Thanks in advance, Albina. -- View this message in context: http://r.789695.n4.nabble.com/Package-rrcov-functions-PcaCov-PcaHubert-PcaGrid-tp3664644p3664644.html Sent from the R help mailing list archive at Nabble.com.