Texas Instruments TITANIUM TI-89 - Manual (Page 803)

Appendix A: Functions and Instructions 803
Cycle CATALOG
Cycle
Transfers program control immediately to the
next iteration of the current loop (
For , While , or
Loop ).
Cycle is not allowed outside the three looping
structures ( For , While , or Loop ).
Program listing:
:¦ Sum the integers from 1 to
100 skipping 50.
:0! temp
:For i,1,100,1
:If i=50
:Cycle
:temp+i! temp
:EndFor
:Disp temp
Contents of
temp
after execution:5000
CyclePic CATALOG
CyclePic picNameString , n [ , [ wait ] , [ cycles ] ,
[ direction ]]
Displays all the PIC variables specified and at the
specified interval. The user has optional control
over the time between pictures, the number of
times to cycle through the pictures, and the
direction to go, circular or forward and
backwards.
direction is 1 for circular or ë 1 for forward and
backwards. Default = 1.
1. Save three pics named pic1 , pic2 , and pic3 .
2. Enter: CyclePic " pic ",3,.5,4,ë1
3. The three pictures (3) will be displayed
automatically—one-half second (.5) between
pictures, for four cycles (4), and forward and
backwards (ë1).
4444Cylind
MATH/Matrix/Vector ops menu
vector 4444Cylind
Displays the row or column vector in cylindrical
form [r
∠
q, z].
vector must have exactly three elements. It can be
either a row or a column.
[2,2,3] 4Cylind ¸
[ 2ø ‡2 
p
4
3 ]
cZeros()
MATH/Algebra/Complex menu
cZeros( expression , var ) ⇒ ⇒ ⇒ ⇒ list
Returns a list of candidate real and non-real
values of
var that make expression =0. cZeros()
does this by computing
exp 8 8 8 8list(cSolve( expression =0, var ) , var ) .
Otherwise, cZeros() is similar to zeros() .
Note: See also cSolve() , solve() , and zeros() .
Display Digits mode in Fix 3 :
cZeros(x^5+4x^4+5x^3ì 6xì 3,x) ¸
{л 2.125 л.612 .965
л 1.114 м 1.073ш i
л 1.114 + 1.073ш i }
Note: If expression is non-polynomial with
functions such as abs() , angle() , conj() , real() ,
or imag() , you should place an underscore
( ¥  )
at the end of var . By default, a variable is
treated as a real value. If you use var _ , the
variable is treated as complex.
You should also use var _ for any other variables
in expression that might have unreal values.
Otherwise, you may receive unexpected results.
z is treated as real:
cZeros(conj(z)м1м i ,z) ¸
{1+ i }
z_ is treated as complex:
cZeros(conj(z_)м1м i ,z_) ¸
{1ì i }
cZeros({ expression1 , expression2 [, … ] },
{ varOrGuess1 , varOrGuess2 [, … ] })
⇒ ⇒ ⇒ ⇒ matrix
Returns candidate positions where the
expressions are zero simultaneously. Each
varOrGuess specifies an unknown whose value you
seek.