Texas Instruments Titanium TI-89, User Manual

Page: 867 / 977

864 Appendix A: Functions and Instructions
Try
CATALOG
Try
block1
Else
block2
EndTry
Executes block1 unless an error occurs. Program
execution transfers to block2 if an error occurs in
block1 . Variable
errornum
contains the error number
to allow the program to perform error recovery.
block1
and
block2
can be either a single statement or
a series of statements separated with the “:”
character.
Program segment:
©
:Try
: NewFold(temp)
: Else
:
¦
Already exists
: ClrErr
:EndTry
©
Note: See
ClrErr
and
PassErr
.
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
ù
arctest
¸
50
15 ! arctest ¸
N
Unarchiv arctest ¸ Done
15 ! arctest ¸ 15