Approximation & Stability
========================

Methods for curve fitting and numerical stability analysis.

English API (Aliases)
---------------------

.. autofunction:: numpyy.least_squares
.. autofunction:: numpyy.least_squares_origin
.. autofunction:: numpyy.design_matrix
.. autofunction:: numpyy.normal_equations
.. autofunction:: numpyy.condition_number
.. autofunction:: numpyy.is_ill_conditioned

Backend French API
------------------

.. automodule:: numpyy.approximation
   :members:

Example: Least Squares Fit
--------------------------

.. code-block:: python

   import numpyy as ny
   
   x = [1, 2, 3]
   y = [2, 4, 6]
   # Fit line
   poly = ny.least_squares(x, y, degree=1)
   print(f"Fit: {poly}")