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並前往https://discuss.boardinfinity.com/t/r-matrix-tutorial-create-print-add-column-slice/5016

R Matrix Tutorial: Create, Print, add Column, Slice

matrix_c[1:3,2:3] results in a R slice matrix with the data on the rows 1, 2, 3 and columns 2, 3,; matrix_c[,1] selects all elements of the ...

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