Texas Instruments TITANIUM TI-89 User Manual page 862

randMat()
MATH/Probability menu
numRows
randMat(
Returns a matrix of integers between -9 and 9 of
the specified dimension.
Both arguments must simplify to integers.
randNorm()
MATH/Probability menu
mean
randNorm(
Returns a decimal number from the specific
normal distribution. It could be any real number
but will be heavily concentrated in the interval
[ -3ù
mean
randPoly()
MATH/Probability menu
var
randPoly( ,
Returns a polynomial in
The coefficients are random integers in the range
ë 9 through 9. The leading coefficient will not be
zero.
must be 0–99.
order
RandSeed
MATH/Probability menu
number
RandSeed
If number
defaults for the random-number generator. If
number
which are stored in system variables
and
seed2
RclGDB
CATALOG
GDBvar
RclGDB
Restores all the settings stored in the Graph
database variable
For a listing of the settings, see
Note: It is necessary to have something saved in
GDBvar
RclPic
CATALOG
picVar
RclPic [,
Displays the Graph screen and adds the picture
stored in
coordinates (
must be a picture data type.
picVar
Default coordinates are (0, 0).
real()
MATH/Complex menu
expression1
real(
Returns the real part of the argument.
Note: All undefined variables are treated as real
variables. See also
862
) ⇒ ⇒ ⇒ ⇒
numColumns
,
) ⇒ ⇒ ⇒ ⇒
sd expression
,
, +3ù ].
sd mean sd
) ⇒ ⇒ ⇒ ⇒
order expression
of the specified order.
var
= 0, sets the seeds to the factory
ƒ 0, it is used to generate two seeds,
.
.
GDBvar
StoGDB
before you can restore it.
row column
, ]
at the upper left-hand corner pixel
picVar
, ) using OR logic.
row column
) ⇒ ⇒ ⇒ ⇒
expression
.
imag()
RandSeed 1147 ¸
matrix
randMat(3,3) ¸
Note: The values in this matrix will change
each time you press ¸.
RandSeed 1147 ¸
randNorm(0,1) ¸
randNorm(3,4.5) ¸
RandSeed 1147 ¸
randPoly(x,5) ¸
RandSeed 1147 ¸
rand() ¸
seed1
RclGDB GDBvar ¸
.
real(2+3
real(z) ¸
real(x+iy) ¸
Appendix A: Functions and Instructions


ë 2 3 ë 6

ë 2 ø x +3 ø x ì 6 ø x
5 4
) ¸
i
Done
8 ë 3 6



0 4 ë 6
Done
.492
...
ì 3.543
...
Done
+4 ø x ì 6
3
Done
.158
...
Done
2
z
x