HP 39g Graphing Calculator - Manual (Page 185)

EIGENVAL
EIGENVV
IDENMAT
INVERSE
LQ
LSQ
LU
MAKEMAT
Displays the eigenvalues in vector forni for maTrix.
ElGEmAUrnatrix)
Eigenvectors and Eigenvalues for a square matrix. Displays a
list of two arrays. The first contains the eigenvectors and the
second contains the eigenvalues.
EIGEHNN {matrix)
Identity matrix. Creates a square matrix of dimension
size
X size whose diagonal elements are 1 and off-diagonal
elements are zero.
IDENMAT(iiZ£-)
Inverts a square matrix (real or complex).
INVERSE(wjafru-)
LQ Factorization. Factors an m x n matrix into three matrices:
{
[[ m
X
n Iowertrapezoidal]],[[ nx n orthogonal]],
[ [ m x m permutation]]).
LQ(matrix)
Least Squares. Displays the minimum norm least squares
matrix (or vector).
LSQ{matrixJ, matrix!)
LU Decomposition. Factors a square matrix into three
matrices:
{[\lowertriangidar]],[{uppertriangular]],[[permutatioii\]}
The uppertriangular has ones on its diagonal.
hl](matrix)
Make Matrix. Creates a matrix of dimension rows x columns,
using expression to calculate each element. If expression
contains the variables I and J, then the calculation for each
element substitutes the cument row number for I and the
current column number for J.
MAKEMATlexprexxirin, rows, columns)
Example
MAKEMAT(0,3,3) returns a 3x3 zero matrix,
[[0,0,0J,[0,0,0J,[0,0,0]].
Matrices 12-11