Dimension ERROR
Casio Casio Calculator
Severity: MinorWhat Does This Error Mean?
Dimension ERROR means matrix or vector dimensions are incompatible for the operation. You cannot add different-sized matrices or multiply matrices with wrong dimensions. Check the sizes of your matrices.
Affected Models
- Casio fx-991EX
- Casio fx-CG50
- Casio fx-9860GII
- Casio ClassPad
Common Causes
- Adding/subtracting matrices of different sizes
- Matrix multiplication with incompatible dimensions
- Vector operations with mismatched dimensions
- Attempting to invert a non-square matrix
How to Fix It
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Check matrix dimensions before operating.
Addition/subtraction: both matrices must be same size. Multiplication: A(m×n) × B(n×p) — columns of A must equal rows of B.
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Use the DIM function to check sizes.
On graphing Casios: check the matrix editor to see rows and columns.
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For inverse: matrix must be square (same rows and columns).
You can only invert square matrices (2×2, 3×3, etc.).
Frequently Asked Questions
Can I multiply a 2×3 by a 3×2 matrix?
Yes. The result is a 2×2 matrix. The rule: columns of the first must equal rows of the second.
Does the fx-991EX support matrices?
Yes. The fx-991EX supports up to 4×4 matrices. Access via MENU > Matrix.