Texas Instruments PLUS TI-89 - Manual (Page 533)

516 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 516 of 132
TwoVar MATH/Statistics menu
TwoVar list1 , list2 [ , [ list3 ] [, list4 , list5 ] ]
Calculates the TwoVar statistics and updates
all the system statistics variables.
All the lists must have equal dimensions
except for
list5 .
list1 represents xlist.
list2 represents ylist.
list3 represents frequency.
list4 represents category codes.
list5 represents category include list.
Note: list1 through list4 must be a variable
name or c1–c99 (columns in the last data
variable shown in the Data/Matrix Editor).
list5 does not have to be a variable name and
cannot be c1–c99.
{0,1,2,3,4,5,6}! L1 ¸
{0 1 2 ...}
{0,2,3,4,3,4,6}! L2 ¸
{0 2 3 ...}
TwoVar L1,L2 ¸ Done
ShowStat ¸
Unarchiv CATALOG
Unarchiv var1 [, var2] [, var3] …
Moves the specified variables from the user
data archive memory to RAM.
You can access an archived variable the same
as you would a variable in RAM. However,
you cannot delete, rename, or store to an
archived variable because it is locked
automatically.
To archive variables, use Archive .
10!arctest ¸ 10
Archive arctest ¸ Done
5ù arctest ¸ 50
15!arctest ¸
N
Unarchiv arctest ¸
Done
15!arctest ¸ 15
unitV() MATH/Matrix/Vector ops menu
unitV( vector1 ) ⇒
vector
Returns either a row- or column-unit vector,
depending on the form of
vector1 .
vector1 must be either a single-row matrix or
a single-column matrix.
unitV([a,b,c]) ¸
[
a
añ +bñ +cñ
b
añ +bñ +cñ
c
añ +bñ +cñ
]
unitV([1,2,1]) ¸
[
‡6
6
‡6
3
‡6
6
]
unitV([1;2;3]) ¸







 ‡14
14
‡14
7
3ø ‡14
14
Unlock CATALOG
Unlock var1[, var2][, var3] ...
Unlocks the specified variables.
Note: The variables can be locked using the
Lock command.