Texas Instruments TI-89 Titanium Short User Manual page 195

FnOn [1] [, 2] ... [,99]
Selects the specified Y= functions for the current
graphing mode.
Note: In 3D graphing mode, only one function at
a time can be selected.
deselects any previously selected function. In the
other graph modes, previously selected functions
are not affected.
For
CATALOG
var low high
For , ,
block
EndFor
Executes the statements in
each value of
of
step
must not be a system variable.
var
can be positive or negative. The default value
step
is 1.
block can be either a single statement or a series
of statements separated with the ":" character.
format()
MATH/String menu
expression
format(
Returns
the format template.
expression
is a string and must be in the form: "
n
" ", "
S[ ]
optional portions.
n
: Fixed format.
F[ ]
display after the decimal point.
n
: Scientific format.
S[ ]
display after the decimal point.
n
: Engineering format.
E[ ]
digits after the first significant digit. The exponent
is adjusted to a multiple of three, and the decimal
point is moved to the right by zero, one, or two
digits.
n c
G[ ][
digits to the left of the radix into groups of three.
c
specifies the group separator character and
defaults to a comma. If
will be shown as a comma.
c
: Any of the above specifiers may be suffixed
[R ]
with the
character that specifies what to substitute for the
radix point.
Appendix A: Functions and Instructions
FnOn 2
step
[, ]
block
, from to
var low
.
) ⇒
, formatString
[ ]
as a character string based on
expression
must simplify to a number.
n n c
", " ", where
E[ ] G[ ][ ]
n
is the number of digits to
n
is the number of digits to
n
is the number of
: Same as fixed format but also separates
]
c is a period, the radix
c c
radix flag, where
R
selects and
z2(x,y)
Program segment:
:0! tempsum : 1! step
iteratively for
:For i,1,100,step
, in increments
high
:
:EndFor
:Disp tempsum
Contents of
execution:
Contents of
is changed to
string
format(1.234567,"f3") ¸
format(1.234567,"s2") ¸
formatString
n
[ ",
F ]
format(1.234567,"e3") ¸
indicate
[ ]
format(1.234567,"g3") ¸
format(1234.567,"g3") ¸
format(1.234567,"g3,r:") ¸
is a single
©
tempsum+i! tempsum
©
tempsum after
when
tempsum
:
2
5050
step
2500
"1.235"
"1.23í 0"
"1.235í 0"
"1.235"
"1,234.567"
"1:235"
189