Texas Instruments Titanium TI-89, User Manual

Page: 831 / 977

828 Appendix A: Functions and Instructions
PowerReg
MATH/Statistics/Regressions menu
PowerReg list1 , list2
[
, [ list3 ] [ , list4 , list5 ]
]
Calculates the power regression and updates all the
system statistics variables.
All the lists must have equal dimensions except for
list5
.
list1 represents xlist.
list2
represents ylist.
list3
represents frequency.
list4
represents category codes.
list5
represents category include list.
Note:
list1
through
list4
must be a variable name or
c1–c99 (columns in the last data variable shown in
the Data/Matrix Editor).
list5
does not have to be a
variable name and cannot be c1–c99.
In function graphing mode:
{1,2,3,4,5,6,7}
!
L1
¸
{1 2 3 ... }
{1,2,3,4,3,4,6} ! L2 ¸
{1 2 3 ... }
PowerReg L1,L2
¸
Done
ShowStat
¸
¸
Regeq(x)
"
y1(x)
¸
Done
NewPlot 1,1,L1,L2
¸
Done
¥ %
Prgm
CATALOG
Prgm
©
EndPrgm
Required instruction that identifies the beginning of
a program. Last line of program must be
EndPrgm
.
Program segment:
:prgmname()
:Prgm
:
:EndPrgm
Product (PI)
See
Π
( ) , page 881.
product()
MATH/List menu
product(
list
[
, start
[
, end
]])
⇒
expression
Returns the product of the elements contained in
list
.
Start
and
end
are optional. They specify a range
of elements.
product({1,2,3,4})
¸
24
product({2,x,y})
¸
2
ø
x
ø
y
product({4,5,8,9},2,3)
¸
40
product (
matrix1
[
, start
[
, end
]] )
⇒
matrix
Returns a row vector containing the products of the
elements in the columns of
matrix1
.
Start
and
end
are
optional. They specify a range of rows.
product([1,2,3;4,5,6;7,8,9])
¸
[28 80 162]
product( [1,2,3;4,5,6;7,8,9],
1,2)
¸
[4,10,18]
Prompt
CATALOG
Prompt
var1
[,
var2
] [,
var3
] ...
Displays a prompt on the Program I/O screen for
each variable in the argument list, using the prompt
var1?
. Stores the entered expression in the
corresponding variable.
Prompt
must have at least one argument.
Program segment:
©
Prompt A,B,C
©
EndPrgm