HP 39gII - Page 214

204 Matrices
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]].
QR QR Factorization. Factors an m×n matrix into three
matrices: {[[m×m orthogonal]],[[m×n
uppertrapezoidal]],[[n×n permutation]]}.
QR(matrix)
RANK Rank of a rectangular matrix.
RANK(matrix)
ROWNORM Row Norm. Finds the maximum value (over all rows) for
the sums of the absolute values of all elements in a row.
ROWNORM(matrix)