Appendix A: Functions and Instructions 827
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
4Polar MATH/Matrix/Vector ops menu
vector
4Polar
Displays
vector
in polar form [r
oq
]. The vector must
be of dimension 2 and can be a row or a column.
Note:
4Polar
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
4Rect
.
[1,3.]
4Polar
¸
[x,y]
4Polar
¸
complexValue
4Polar
Displays
complexVector
in polar form.
•
Degree angle mode returns (r
oq
).
•
Radian angle mode returns r
e
i
q
.
complexValue
can have any complex form. However,
an r
e
i
q
entry causes an error in Degree angle mode.
Note: You must use the parentheses for an (r
oq
)
polar entry.
In Radian angle mode:
3+4
i
4Polar ¸
e
i
ø
(
p
2
ì tanê(3/4))
ø5
(4op/3)4Polar ¸
e
iøp
3
ø4
In Degree angle mode:
3+4
i
4Polar ¸(5o90ì tanê(3/4))
polyEval() MATH/List menu
polyEval(
list1
,
expression1
) ⇒
expression
polyEval(
list1
,
list2
) ⇒
expression
Interprets the first argument as the coefficient of a
descending-degree polynomial, and returns the
polynomial evaluated for the value of the second
argument.
polyEval({a,b,c},x)
¸
aø xñ +bø x+c
polyEval({1,2,3,4},2)
¸ 26
polyEval({1,2,3,4},{2,ë 7})
¸ {26 ë 262}
PopUp CATALOG
PopUp
itemList
,
var
Displays a pop-up menu containing the character
strings from
itemList
, waits for you to select an item,
and stores the number of your selection in
var
.
The elements of
itemList
must be character strings:
{
item1String
,
item2String
,
item3String
, ...}
If
var
already exists and has a valid item number,
that item is displayed as the default choice.
itemList
must contain at least one choice.
PopUp
{"1990","1991","1992"},var1
¸
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