.. dynamic/index.rst: Dynamic Shapes ============== For an example on how to use dynamic shapes, see the :ref:`scenario_two` documentation. Runtime Error Checking ---------------------- Static type-checking in the presence of dynamic shapes will make optimistic assumptions about things like shape mismatches. For example, if an elementwise op is provided inputs of shapes ``(2,?)`` and ``(?,5)``, the type checker will proceed under the assumption that the user is not going to pass tensors with inconsistent shape at runtime, and therefore infer an output shape of ``(2,5)``. That means that shape mismatches can now occur at runtime. .. _partial_shapes: PartialShape, Dimension, and Rank Classes ----------------------------------------- Partial shape information is expressed via the ``PartialShape``, ``Dimension``, and ``Rank`` classes. .. note:: ``Rank`` is an alias for ``Dimension``, used when the value represents the number of axes in a shape, rather than the size of one dimension in a shape. .. doxygenclass:: ngraph::PartialShape :project: ngraph :members: .. doxygenclass:: ngraph::Dimension :project: ngraph :members: