Reference Guide
Full Command and Function Reference 3-199
REORDER
Type: Function
Description: Given a polynomial expression and a variable, reorders the variables in the expression in the order
of powers set on the CAS Modes screen, that is, either in increasing or decreasing order.
Access: Catalog, …µ
Input: Level 2/Argument 1: The polynomial expression.
Level 1/Argument 2: The variable with respect to which the reordering is performed.
Output: The reordered expression.
Flags: Exact mode must be set (flag –105 clear).
Numeric mode must not be set (flag –3 clear).
Radians mode must be set (flag –17 set).
Complex mode must be set (flag –103 set) if the polynomial contains complex terms.
The polynomial terms order flag (flag –114) must be set for increasing power order, or clear (the
default) for decreasing power order.
Example: Reorder the polynomial x
2
+ 2y
2
+2x +3y in order of powers of y. Assume that increasing power
mode has been set in the CAS modes.
Command:
REORDER(X^2+2*Y^2+2*X+6+3*Y, Y)
Result:
2*Y^2+3*Y+(X^2+2*X)
REPEAT
Type: Command
Description: REPEAT Command: Starts loop clause in WHILE … REPEAT … END indefinite loop
structure.
See the WHILE entry for more information.
Access: !°
BRANCH WHILE REPEAT
( °is the left-shift of the Nkey).
Input/Output: None
See also: END, WHILE
REPL
Type: Command
Description: Replace Command: Replaces a portion of the target object (first input) with a specified object
(third input), beginning at a specified position (second input).
For arrays, n
position
counts in row order. For matrices, n
position
specifies the new location of the
upper left-hand element of the replacement matrix.
For graphics objects, the upper left corner of grob
1
is positioned at the user-unit or pixel
coordinates (x,y) or { #n #m }. From there, it overwrites a rectangular portion of grob
target
or
PICT. If grob
1
extends past grob
target
or PICT in either direction, it is truncated in that direction. If
the specified coordinate is not on the target graphics object, the target graphics object does not
change.
Access: !°
LIST REPL
( °is the left-shift of the Nkey).