Dimension ERROR
Casio Casio Calculator
Severity: MinorWhat it means
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
-
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. -
Use the DIM function to check sizes.
On graphing Casios: check the matrix editor to see rows and columns.
-
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.