780 Appendix A: Functions and Instructions
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
).
4Cylind MATH/Matrix/Vector ops menu
vector
4Cylind
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
o
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
exp8list(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)
¸
{ë 2.125 ë.612 .965
ë 1.114
ì 1.073ø
i
ë 1.114
+
1.073ø
i
}
Note: If
expression
is non-polynomial with functions
such as
abs()
,
angle()
,
conj()
,
real()
, or
imag()
,
you should place an underscore _
(
@ ¥
q
,
H 2
q
) 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)ì 1ì
i
,z) ¸
{1+
i
}
z_ is treated as complex:
cZeros(conj(z_)ì 1ì
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.
Optionally, you can specify an initial guess for a
variable. Each
varOrGuess
must have the form:
variable
– or –
variable
=
real or non-real number
For example,
x
is valid and so is
x=3+
i
.
If all of the expressions are polynomials and you do
NOT specify any initial guesses,
cZeros()
uses the
lexical Gröbner/Buchberger elimination method to
attempt to determine all complex zeros.
Note: The following examples use an
underscore _ (
@
¥
q
,
H 2
q
) so
that the variables will be treated as complex.
To Next Page
Loading...
Need help?
General
