minor

minor(*param)

Instance Public methods

Returns a section of the matrix. The parameters are either:

start_row, nrows, start_col, ncols; OR
row_range, col_range

Matrix.diagonal(9, 5, -3).minor(0..1, 0..2)
  => 9 0 0
     0 5 0

Like Array#[], negative indices count backward from the end of the row or column (-1 is the last element). Returns nil if the starting row or column is greater than #row_count or #column_count respectively.

Links:

https://github.com/ruby/ruby/blob/9a912c66d4f720e90c3522d40ac29c04dbd86a9b/lib/matrix.rb#L558

doc_ruby_on_rails

2025-01-10 15:47:30

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