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Different behaviors between data frame and matrix in…
sites de rencontres maroc Different behaviors between data frame and matrix in R > # Generate an artificial matrix > test.m row.names(test.m) col.names(test.m) # Generate a data frame from the matrix > test.df > > # Selecting elements > ## the row names can be used to select elemnts from a data frame or a matrix > test.idx test.df[test.idx,…