message: Fixed Gauss-Newton example to work for any data length
diff: @@ -38,7 +38,7 @@ impl ArgminOp for Problem {
  }
  fn jacobian(&self, p: &Self::Param) -> Result<Self::Jacobian, Error> {
  - Ok(Array2::from_shape_fn((7, 2), |(si, i)| {
  + Ok(Array2::from_shape_fn((self.data.len(), 2), |(si, i)| {
  if i == 0 {
  -self.data[si].0 / (p[1] + self.data[si].0)
  } else {
  