Matrix Calculations

1. Matrix mode

Press MODE to open Mode dialog

Tap MATRIX item to enter matrix mode

Press SHIFT 4 to open matrix menu

• NAMES menu: tap an item on this menu to insert a matrix to calculator's input view

• EDIT menu: tap an item on this menu to edit value of a matrix

• MATH menu contains functions to operate on matrices

2. Entering matrix value

MatA=
 [ 4, 2]
 [-1, 6]

MatB=
 [ 2 -1 4]
 [ -3 6 1]
 
MatC=
  [9, -3]
  [2,  1]

Open EDIT menu (SHIFT 4), select MatA

Tap Change dimension to resize the matrix MatA

Select 2x2 matrix, then press Done

Enter value for each cell of matrix MatA, keys: 4 = 2 = - 1 = 6 =

Entering value of matrix MatB=[[2, -1, 4], [-3, 6, 1]] using the same way of entering matrix MatA

Entering value of matrix MatC=[[9, -3], [2, 1]] using the same way of entering matrix MatA

Press AC to exit matrix editor screen

3. Operation on matrices

3.1 Adding 2 matrices

MatA+MatB

Enter matrix MatA: SHIFT 4 => NAMES => select MatA item

Press + (Add) key, then enter matrix MatB: SHIFT 4 => NAMES => select MatB item

The result is displayed

3.2 Multiply 2 matrices

MatA × MatB

Enter matrix MatA: SHIFT 4 => NAMES => select MatA item

Press × (Multiply) key, then enter matrix MatB: SHIFT 4 => NAMES => select MatB item

Power

Use the power key to perform multiply matrix n times

Inverse

Open matrix MATH menu: SHIFT 4 => MATH

Tap Inverse item to enter Inverse function, then using NAMES menu to insert MatA Tap the result to see numeric form (if current settings is symbolic form)

Det

Open matrix MATH menu: SHIFT 4 => MATH

Tap Det item to enter Det function, then using NAMES menu to insert MatA

Other matrix functions

• MatrixRank
• Transpose
• RowReduce
• ...

Updated Thu 7 Dec 2023