Texas Instruments TI-89 Voyage 200, User Manual

Page: 853 / 1008

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
4444
DD
and
4444
Rect
. 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[i
ì
2]+temp[i
ì
1]
"
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
4444
Polar
MATH/Matrix/Vector ops menu
vector 4444
Polar
Displays
vector
in polar form [r q ]. The vector
must be of dimension 2 and can be a row or a
column.
Note :
4444
Polar
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
¸