ERR:DIM MISMATCH
Texas Instruments TI-84 Calculator
Severity: MinorWhat Does This Error Mean?
ERR:DIM MISMATCH means two lists or matrices have incompatible sizes for the operation. For example, adding L1 (5 items) to L2 (3 items) fails because they are different lengths. Check that all lists and matrices have matching dimensions.
Affected Models
- TI-84 Plus
- TI-84 Plus CE
- TI-83 Plus
Common Causes
- Lists in a calculation have different lengths
- Matrix dimensions incompatible for the operation
- Regression with mismatched X and Y lists
- Stat plot using lists of different sizes
How to Fix It
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Check list lengths: STAT > Edit and count entries in each list.
All lists used together must have the same number of entries.
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For matrices: check dimensions match the operation.
Addition: both matrices must be the same size. Multiplication: columns of first must equal rows of second.
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Fix unequal lists by adding or removing entries.
Edit lists in STAT > Edit. Add missing values or delete extras.
Frequently Asked Questions
What is the difference between DIM MISMATCH and INVALID DIM?
DIM MISMATCH: two objects have incompatible sizes. INVALID DIM: a single object's size is wrong for the operation, or a stat plot references an empty list.
How do I check a list's length?
Press 2nd > LIST > dim( > select the list > ENTER. This shows the number of entries.