Texas Instruments PLUS TI-89 - Manual (Page 523)

506 Appendix A: Functions and Instructions
8992APPA.DOC TI-89 / TI-92 Plus: Appendix A (US English) Susan Gullord Revised: 02/23/01 1:48 PM Printed: 02/23/01 2:21 PM Page 506 of 132
Each solution variable starts at its guessed
value if there is one; otherwise, it starts at
0.0.
Use guesses to seek additional solutions one
by one. For convergence, a guess may have
to be rather close to a solution.
solve(e^(z)ù y=1 and
ë y=sin(z),{y,z=2p}) ¸
y=.001… and z=6.281…
SortA MATH/List menu
SortA listName1 [, listName2 ] [, listName3 ] ...
SortA vectorName1 [, vectorName2 ] [, vectorName3 ] ...
Sorts the elements of the first argument in
ascending order.
If you include additional arguments, sorts the
elements of each so that their new positions
match the new positions of the elements in
the first argument.
All arguments must be names of lists or
vectors. All arguments must have equal
dimensions.
{2,1,4,3}! list1 ¸ {2,1,4,3}
SortA list1 ¸ Done
list1 ¸ {1 2 3 4}
{4,3,2,1}! list2 ¸ {4 3 2 1}
SortA list2,list1 ¸ Done
list2 ¸ {1 2 3 4}
list1 ¸ {4 3 2 1}
SortD MATH/List menu
SortD listName1 [, listName2 ] [, listName3 ] ...
SortD vectorName1 [, vectorName 2 ] [, vectorName 3 ] ...
Identical to SortA , except SortD sorts the
elements in descending order.
{2,1,4,3}! list1 ¸ {2 1 4 3}
{1,2,3,4}! list2 ¸ {1 2 3 4}
SortD list1,list2 ¸ Done
list1 ¸ {4 3 2 1}
list2 ¸ {3 4 1 2}
4 Sphere MATH/Matrix/Vector ops menu
vector 4 Sphere
Displays the row or column vector in
spherical form [
r q f].
vector must be of dimension 3 and can be
either a row or a column vector.
Note : 4 Sphere is a display-format instruction,
not a conversion function. You can use it
only at the end of an entry line.
[1,2,3] 4Sphere
¥ ¸ [3.741... 1.107... .640...]
[2, pà4,3]4Sphere
¥ ¸ [3.605... .785... .588...]
¸ [ ‡13 
p
4
cosê (
3ø ‡13
13
) ]
X
Y
Z
(ρ,θ,φ)
θ
φ
ρ
stdDev() MATH/Statistics menu
stdDev( list [ , freqlist ]) ⇒
expression
Returns the standard deviation of the
elements in
list .
Each freqlist element counts the number of
consecutive occurrences of the
corresponding element in
list .
Note: list must have at least two elements.
stdDev({a,b,c}) ¸
stdDev({1,2,5,л 6,3,л 2}) ¸
stdDev({1.3,2.5, L6.4},{3,2,5})
¸ 4.33345