Texas Instruments Voyage 200, User Manual

Page: 853 / 1008

Appendix A: Functions and Instructions 855
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 8
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
propFrac()
MATH/Algebra menu
propFrac(
expression1
[ ,
var
] )
⇒
⇒ ⇒
⇒
expression
propFrac(
rational_number
)
returns rational_number
as the sum of an integer and a fraction having the
same sign and a greater denominator magnitude
than numerator magnitude.
propFrac(4/3)
¸
1 + 1/3
propFrac(
ë
4/3)
¸ ë
1
ì
1/3
propFrac( rational_expression,var )
returns the sum
of proper ratios and a polynomial with respect to
var
. The degree of
var
in the denominator exceeds
the degree of
var
in the numerator in each proper
ratio. Similar powers of
var
are collected. The
terms and their factors are sorted with var as the
main variable.
If
var
is omitted, a proper fraction expansion is
done with respect to the most main variable. The
coefficients of the polynomial part are then made
proper with respect to their most main variable
first and so on.
For rational expressions,
propFrac()
is a faster
but less extreme alternative to
expand()
.
propFrac((x^2+x+1)/(x+1)+
(y^2+y+1)/(y+1),x)
¸
propFrac(ans(1))
PtChg
CATALOG
PtChg
x
,
y
PtChg
xList
,
yList
Displays the Graph screen and reverses the screen
pixel nearest to window coordinates
(
x , y ).
Note :
PtChg
through
PtText
show
continuing similar examples.
PtChg 2,4
¸
PtOff
CATALOG
PtOff x , y
PtOff xList , yList
Displays the Graph screen and turns off the
screen pixel nearest to window coordinates
(
x
,
y
).
PtOff 2,4
¸