trekhleb/javascript-algorithms · error · Error

Invalid matrix format

Error message

Invalid matrix format

What it means

Error "Invalid matrix format" thrown in trekhleb/javascript-algorithms.

Source

Thrown at src/algorithms/math/matrix/Matrix.js:36

const validateType = (m) => {
  if (
    !m
    || !Array.isArray(m)
    || !Array.isArray(m[0])
  ) {
    throw new Error('Invalid matrix format');
  }
};

View on GitHub (pinned to 85293e3e2b)

Solutions

1. Pass an array of arrays (or deeper nested arrays); the first element must itself be an array.
2. Guard inputs with Array.isArray checks before calling matrix operations.
3. Build matrices with the provided helpers (zeros / generate) instead of ad-hoc values.

When it happens

Trigger: A matrix helper that calls validateType receives a value m that is falsy, is not an array, or whose first element m[0] is not an array — e.g. a number, a flat 1D array, or undefined.

Common situations: Passing a flat array, scalar, null, or non-array value to matrix functions such as dot, t, add, mul, or sub.

AI-assisted analysis of trekhleb/javascript-algorithms@85293e3e2b (2026-08-24). Data as JSON: /api/errors/e311a47101f87d0d. Report an issue: GitHub.