Type & Coercion Errors
Non-conformable arguments
Matches: non-conformable arguments
WHAT THIS ERROR MEANS
Matrix multiplication or a similar operation failed because the dimensions don't match. The number of columns in the first matrix must equal the number of rows in the second.
HOW TO FIX IT
1. Check dimensions with dim().
2. For matrix multiplication A %*% B: ncol(A) must equal nrow(B).
3. Transpose with t() if needed.
CODE EXAMPLES
BAD — THIS CAUSES THE ERROR
A <- matrix(1:6, nrow = 2) B <- matrix(1:4, nrow = 2) A %*% B # 2x3 times 2x2 fails
GOOD — CORRECT APPROACH
A <- matrix(1:6, nrow = 2) B <- matrix(1:6, nrow = 3) A %*% B # 2x3 times 3x2 works
Still stuck?
Paste your code in RChat and the AI will fix this error in context.
RELATED TYPE & COERCION ERRORS
Non-numeric argument to operator You tried to do math (like +, -, *, /) on something that isn't a number, such as...
Argument not numeric or logical A function that expects numbers (like mean, sum, sd) received non-numeric data s...
Cannot coerce type R tried to convert one data type to another but failed because the conversion is...
Invalid argument type An argument you passed to a function is the wrong type. The function expected on...