Kalman Filter for Beginners: A Step-by-Step Guide with MATLAB

Content Breakdown

% --- Update --- x_est = x_pred + K * (z - H * x_pred); P_est = (eye(2) - K * H) * P_pred;

Conclusion

The Kalman filter works in two steps:

  • Output figure: Smoother curve than raw measurements
  • Download the code, change the parameters (try R=100 or Q=10), and watch how the filter behaves. Break it on purpose—that’s the best way to learn.

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