Texas Instruments Titanium TI-89 - Twovar Math;Statistics Menu; Unarchiv Catalog; Unitv Math;Matrix;Vector Ops Menu; Unlock Catalog

892 Appendix A: Functions and Instructions
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
5
ùarctest ¸ 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.