T3Variations.from_vector
========================

.. py:method:: t3toolbox.frame_variations_format.T3Variations.from_vector(flat, variation_shapes, stack_shape = ())
   :staticmethod:


   .. code-block:: python

      def from_vector(
              flat,                                       # shape=(size,)
              variation_shapes,                           # (tucker_variation_shapes, tt_variation_shapes)
              stack_shape:    typ.Tuple[int, ...] = (),   # full leading stack K + C
      ) -> 'T3Variations':


   Inverse of :py:meth:`to_vector`: rebuild variations of the given structure from a 1D vector.

   ``variation_shapes = (tucker_variation_shapes, tt_variation_shapes)`` (e.g. a frame's
   :py:attr:`T3Frame.variation_shapes`); ``stack_shape`` is the full leading stack ``K + C``.