IV. Math Menu

    D. 4:Matrix    

 Press . Use and
to select the menu of choice.

Not all options are given in the entry format. Options that are used frequently will be included, but others are omitted from the table. For a complete format listing, you can check the TI-89 manual. Results in complex mode are not covered. They can be found in the manual.
NOTE: Some of the operations of the Matrix menu are not shown below. Refer to your manual for instructions on those operations.

Operation
Entry Format
Explanation
Screen
1:(Transpose) matrix1 Returns the complex conjugate
transpose of matrix1.
You must name the matrix first.
Use the and keys
to name the matrix.
2:det det(squareMatrix) Returns the determinant of
squareMatrix.
3:ref ref(matrix1) Returns the row echelon
form of matrix1.
4:rref rref(matrix1) Returns the reduced row
echelon form of matrix1.
5:simult simult(coefMatrix,constVector)
Returns a column vector that
contains the solutions to a
system of linear equations.
6:identity identity(expression) Returns the identity matrix
with a dimension of expression.
7:augment augment(list1,list2) Returns a new list that is list2
appended to the end of list1.

J:Row ops 1:rowSwap

 rowSwap(matrix1,rIndex1,rIndex2) Swaps the indicated rows.

J:Row ops 2:rowAdd

 rowAdd(matrix1,rIndex1,rIndex2) Replaces rIndex2 with the sum
of rIndex1 and rIndex2.

J:Row ops 3:mRow

 mRow(expression, matrix1,index) Multiplies the row "index",
by the expression.

J:Row ops 4:mRowAdd

 mRowAdd(expression, matrix1,index1,index2)

Multiplies row "index1", adds that
to row "index2", and replaces
row "index2" with the result.

K:Element ops 1:.+

 matrix1 .+ matrix2
expression .+ matrix1		 matrix1 .+ matrix2 returns a
matrix that is the sum of
corresponding elements.

K:Element ops 2:.-

 matrix1 .- matrix2
expression .- matrix1		 matrix1 .- matrix2 returns a
matrix that is the difference of
corresponding elements.

K:Element ops 3:.*

 matrix1 .* matrix2
expression .* matrix1		 matrix1 .* matrix2 returns a
matrix that is the product of
corresponding elements.

K:Element ops 4:./

 matrix1 ./ matrix2
expression ./ matrix1		 matrix1 .+ matrix2 returns a
matrix that is the quotient of
corresponding elements.

K:Element ops 5:.^

 matrix1 .^ matrix2
expression .^ matrix1		 matrix1 .+ matrix2 returns a
matrix that is the exponent of
corresponding elements.

L:Vector ops 1:unitV

 unitV(vector1) Returns a unit vector

L:Vector ops 2:crossP

 crossP(list1,list2)
crossP(vector1,vector2)		 Returns the cross product.

L:Vector ops 3:dotP

 dotP(list1,list2)
dotP(vector1,vector2)		 Returns the dot product.

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