Appendix A: Functions and Instructions 227
randPoly() MATH/Probability menu
randPoly(
var
,
order
) ⇒
expression
Returns a polynomial in
var
of the specified order.
The coefficients are random integers in the range
ë 9 through 9. The leading coefficient will not be
zero.
order
must be 0–99.
RandSeed 1147 ¸ Done
randPoly(x,5)
¸
ë 2ø x
5
+3ø x
4
ì 6ø x
3
+4ø xì 6
RandSeed MATH/Probability menu
RandSeed
number
If
number
= 0, sets the seeds to the factory
defaults for the random-number generator. If
number
ƒ 0, it is used to generate two seeds,
which are stored in system variables
seed1
and seed2.
RandSeed 1147 ¸ Done
rand() ¸ .158...
RclGDB CATALOG
RclGDB
GDBvar
Restores all the settings stored in the Graph
database variable
GDBvar.
For a listing of the settings, see
StoGDB.
Note: It is necessary to have something saved in
GDBvar before you can restore it.
RclGDB GDBvar ¸ Done
RclPic CATALOG
RclPic
picVar
[,
row
,
column
]
Displays the Graph screen and adds the picture
stored in
picVar
at the upper left-hand corner pixel
coordinates (
row
,
column
) using OR logic.
picVar
must be a picture data type.
Default coordinates are (0, 0).
real() MATH/Complex menu
real(
expression1
) ⇒
expression
Returns the real part of the argument.
Note: All undefined variables are treated as real
variables. See also
imag().
real(2+3
i
) ¸ 2
real(z)
¸ z
real(x+
i
y) ¸ x
real(
list1
) ⇒
list
Returns the real parts of all elements.
real({a+
i
ù b,3,
i
}) ¸ {a 3 0}
real(
matrix1
) ⇒
matrix
Returns the real parts of all elements.
real([a+
i
ù b,3;c,
i
]) ¸ [
a 3
c 0
]
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