--- Matrix#minor(from_row,row_size,from_col,col_size)
--- Matrix#minor(from_row..to_row,from_col..to_col)
    returns sub matrix. parameter is specified as the following:
    (1) from_row, row_size, from_col, size_col
    (2) from_row..to_row, from_col..to_col

    ʬ֤ѥ᡼ϡˡǻꤹ롣
    (1) Ϲֹ, Ԥ礭, ֹ, 礭
    (2) Ϲֹ..λֹ, ֹ..λֹ

