Texas Instruments TITANIUM TI-89 - Manual (Page 853)

Appendix A: Functions and Instructions 853
PassErr CATALOG
PassErr
Passes an error to the next level.
If “errornum” is zero, PassErr does not do
anything.
The Else clause in the program should use ClrErr
or PassErr . If the error is to be processed or
ignored, use ClrErr . If what to do with the error
is not known, use PassErr to send it to the next
error handler. (See also ClrErr .)
See ClrErr program listing example.
Pause CATALOG
Pause [ expression ]
Suspends program execution. If you include
expression , displays expression on the Program I/O
screen.
expression can include conversion operations such
as 4444DD and 4444Rect . You can also use the 4
operator to perform unit and number base
conversions.
If the result of expression is too big to fit on a
single screen, you can use the cursor pad to scroll
the display.
Program execution resumes when you
press ¸.
Program segment:
©
:ClrIO
:DelVar temp
:1"temp[1]
:1"temp[2]
:Disp temp[2]
:¦ Guess the Pattern
:For i,3,20
: temp[iì2]+temp[iì1]"temp[i]
: Disp temp[i]
: Disp temp,"Can you guess the
next","number?"
: Pause
:EndFor
©
PlotsOff CATALOG
PlotsOff [1] [, 2] [, 3] ... [, 9]
Turns off the specified plots for graphing. When
in 2-graph mode, only affects the active graph.
If no parameters, then turns off all plots.
PlotsOff 1,2,5 ¸ Done
PlotsOff ¸ Done
PlotsOn CATALOG
PlotsOn [1] [, 2] [, 3] ... [, 9]
Turns on the specified plots for graphing. When in
2-graph mode, only affects the active graph.
If you do not include any arguments, turns on all
plots.
PlotsOn 2,4,5 ¸ Done
PlotsOn ¸ Done
4444Polar
MATH/Matrix/Vector ops menu
vector 4444Polar
Displays vector in polar form [r q]. The vector
must be of dimension 2 and can be a row or a
column.
Note: 4444Polar is a display-format instruction, not
a conversion function. You can use it only at the
end of an entry line, and it does not update
ans .
Note: See also 4 Rect .
[1,3.] 4 Polar ¸
[x,y] 4 Polar ¸