- :class:`~sklearn.decomposition.IncrementalPCA`
  will now only raise a ``ValueError`` when the number of samples in the
  input data to ``partial_fit`` is less than the number of components
  on the first call to ``partial_fit``. Subsequent calls to ``partial_fit``
  no longer face this restriction.
  By :user:`Thomas Gessey-Jones <ThomasGesseyJonesPX>`
