HP 40G manual Eigenval, Eigenvv, Idenmat, Inverse, Lsq, Makemat

EIGENVAL	Displays the eigenvalues in vector form for matrix.
	EIGENVAL(matrix)
EIGENVV	Eigenvectors and Eigenvalues for a square matrix. Displays a
	list of two arrays. The first contains the eigenvectors and the
	second contains the eigenvalues.
	EIGENVV(matrix)
IDENMAT	Identity matrix. Creates a square matrix of dimension
	size × size whose diagonal elements are 1 and off-diagonal
	elements are zero.
	IDENMAT(size)
INVERSE	Inverts a square matrix (real or complex).
	INVERSE(matrix)
LQ	LQ Factorization. Factors an m × n matrix into three matrices:
	{[[ m × n lowertrapezoidal]],[[ n × n orthogonal]],
	[[ m × m permutation]]}.
	LQ(matrix)
LSQ	Least Squares. Displays the minimum norm least squares
	matrix (or vector).
	LSQ(matrix1, matrix2)
LU	LU Decomposition. Factors a square matrix into three
	matrices:
	{[[lowertriangular]],[[uppertriangular]],[[permutation]]}
	The uppertriangular has ones on its diagonal.
	LU(matrix)
MAKEMAT	Make Matrix. Creates a matrix of dimension rows × columns,
	using expression to calculate each element. If expression
	contains the variables I and J, then the calculation for each
	element substitutes the current row number for I and the
	current column number for J.
	MAKEMAT(expression, rows, columns)
	Example
	MAKEMAT(0,3,3) returns a 3×3 zero matrix,
	[[0,0,0],[0,0,0],[0,0,0]].

Matrices 12-11