Define matrix [A] =
In addition to those in the Matrix MATH menu, the following matrix operations are allowed. Dimensions must be correct:
| • | matrix + matrix |
| • | matrix – matrix |
| • | matrix × matrix |
| • | Scalar multiplication (for example, 2 × matrix) |
| • | matrix × vector (vector will be interpreted as a column vector) |
% t NAMES
% t displays the matrix NAMES menu, which shows the dimensions of the matrices and lets you use them in calculations. The row and column dimension of a matrix can be 1{row{3 and 1{column{3.
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1:[A] |
Definable matrix [A]. |
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2:[B] |
Definable matrix [B]. |
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3:[C] |
Definable matrix [C]. |
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4:[Ans] |
Last matrix result ([Ans]=row×column), or last vector result ([Ans] dim=n). Not editable. Note: Cell values can be toggled. To view the full precision or exact format, highlight the cell. |
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5:[I2] |
2×2 identity matrix (not editable). |
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6:[I3] |
3×3 identity matrix (not editable). |
% t MATH
% t " displays the matrix MATH menu, which lets you perform the following operations:
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1:Determinant |
Determinant of a square matrix. Syntax: det(squarematrix) |
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2:T Transpose |
Transpose of a matrix. Syntax: matrixT |
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3:Inverse |
Inverse of a square matrix. Syntax: squarematrix–1 |
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4:ref reduced |
Row echelon form. Syntax: ref(matrix) |
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5:rref reduced |
Reduced row echelon form. Syntax: rref(matrix) |
% t EDIT
% t ! displays the matrix EDIT menu, which lets you define or edit matrix [A], [B], or [C].
Note: Press r to toggle the number format in a cell as needed.
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Define matrix [A] = |
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Calculate the determinant, transpose, inverse, and rref of [A].
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Define [A] |
% t ! |
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Set dimensions |
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Enter values |
1 $ 2 $ 3 $ 4 $ |
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det([A]) |
% s % t " |
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Transpose |
% t < % t " $ < |
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Inverse |
% s - % t < % t " $ $ < |
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rref |
- - % t " # |
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