Texas Instruments TI-84 Plus Guide Book

Chapter 10: Matrices 243
ref(, rref(
ref(, rref(ref(, rref(
ref(, rref(
ref( (row-echelon form) returns the row-echelon form of a real matrix. The number of
columns must be greater than or equal to the number of rows.
ref(matrix)
rref(
(reduced row-echelon form) returns the reduced row-echelon form of a real matrix.
The number of columns must be greater than or equal to the number of rows.
rref(matrix)
rowSwap(
rowSwap(rowSwap(
rowSwap(
rowSwap( returns a matrix. It swaps rowA and rowB of matrix.
rowSwap(matrix,rowA,rowB)

Texas Instruments TI-84 Plus Specifications

General

Battery type	AAA
Power source	Battery
Number of batteries supported	4
Type	Graphing
Cover	No
Form factor	Pocket
Control type	Buttons
Product color	Black
USB port	Yes
USB 2.0 ports quantity	1
Digits	- digits
Display number of lines	8 lines
Display number of characters	16
RAM capacity	0.024 MB
ROM capacity	0.480 MB
Storage media type	-