Casio ALGEBRA FX 2.0 Manual page 61

u To input an identity matrix
Use the Identity command to create an identity matrix.
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Example 2 To create a 3 × 3 identity matrix as Matrix A
K2(MAT)g(Ident)
da2(MAT)b(Mat)av(A)w
Number of rows/columns
u To check the dimensions of a matrix
Use the Dim command to check the dimensions of an existing matrix.
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Example 3 To check the dimensions of Matrix A, which was input in
Example 1
K2(MAT)c(Dim)
2(MAT)b(Mat)av(A)w
The display shows that Matrix A consists of two rows and three columns.
You can also use {Dim} to specify the dimensions of the matrix.
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Example 4 To specify dimensions of 2 rows and 3 columns for Matrix B
!*( )c,d!/( )a
K2(MAT)c(Dim)
2(MAT)b(Mat)al(B)w
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Matrix Calculations
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[OPTN]-[MAT]-[Ident]
[OPTN]-[MAT]-[Dim]