276 Function Summary and Index
> 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 ≠ y) test if
the 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-register) by
truncating fractional
portion (page 24).
& Rounds mantissa
of entire (10-digit)
number in X-register to
match display format
(page 24).
Percentage
k Percent. Computes
x% (value in display) of
number in the Y-register
(page 29). Unlike most
two-number functions,
k does not drop the
stack.
∆
Percent difference.
Computes percent of
change between number
in Y-register and number
in display (page 30).
Does not drop the stack.
Prefix Keys
´ Pressed before a
function key to select the
gold function printed
above that key
(page 18).
| Pressed before a
function key to select the
blue function printed
below that key
(page 18).
For other prefix keys,
refer to Display Control
keys (page 273), Storage
keys (page 278), and the
Programming Summary
and Index (page 278).
CLEAR u Cancels
any prefix keystrokes
and partially entered
instructions such as ´
i (page 19). Also
displays the complete
10-digit mantissa of the
number in the display
(page 60).
Probability
c Combination.
Computes the number of
possible sets of y
different items taken x
at a time, and causes the
stack to drop (page 47).