HP HP-15C

Function Summary and Index 265
matrices or of one
matrix and a scalar.
Stores in result matrix
(page 152-155).
÷ For two matrices,
multiplies inverse of
matrix in X by matrix
in Y. For only one
matrix, if matrix in Y,
divides all elements of
matrix by scalar in X; if
matrix in X, multiplies
each element of inverse
of matrix by the scalar
in Y. Stores in result
matrix (pages 152-
155).
“ changes sign of
all elements in matrix
specified in X-register
(page 150).
> {0 through 9}
Matrix operations.
> 0 Dimensions
all matrices to 0×0
(page 143).
> 1 Sets row and
column numbers in R
0
and R
1
to 1 (page 143).
> 2 Complex
transform: Z
P
to 

(page 164).
> 3 inverse
complex transform. 

to Z
P
(page164).
> 4 Transpose X
to X
T
(page 150).
> 5 Transpose
multiply: Y and X to
Y
T
X (page 154).
> 6 Calculates
residuals in result
matrix (page 159).
> 7 Calculates
row norm of matrix
specified in X-register
(page 150).
> 8 Calculates
Frobenius norm of
matrix specified in X-
register (page 150).
> 9 Calculates
determinant of matrix
specified in X-register
(also does LU
decomposition of the
matrix) (page 150).
c Transforms
matrix stored in
"partitioned form" (Z
P
)
to "complex form" (Z
C
)
(page 162).
p Transforms
matrix stored in
"complex form" (Z
C
) to
"partitioned form" (Z
P
)
(page 162).
~ T 0 T 5
T 6 Conditional
tests for matrix
descriptors in the X- or
X- and Y-registers.
~ and T 0 (x 
0) test the quantity in
the X-register for zero.
Matrix descriptors are
considered nonzero.
T 5 (x = y) and
T
6 (x 
descriptors in X and Y
are the same. The result
affects program
execution: skip (one
line) if false (page
174).
Number Alteration
a Yields absolute
value of number in
display (page 24).
q Leaves only
fractional portion of
number in display
(X-register) by
truncating integer
portion (page 24).
‘ Leaves only
integer portion of
number in display (X-