func (m *matrixImpl) Get(row, column int) (element float64) {
rows, columns := m.Shape()
validates.IndexShouldBeInRange(rows, columns, row, column)
row, column = m.rewriter.Rewrite(row, column)
return m.elements[row*m.columns+column]
}
func (m *matrixImpl) Update(row, column int, element float64) types.Matrix {
rows, columns := m.Shape()
validates.IndexShouldBeInRange(rows, columns, row, column)
row, column = m.rewriter.Rewrite(row, column)
m.elements[row*m.columns+column] = element
return m
}