rn

odl.space.space_utils.rn(shape, dtype=None, impl='numpy', \*\*kwargs)[source]

Return a space of real tensors.

Parameters
shapepositive int or sequence of positive ints

Number of entries per axis for elements in this space. A single integer results in a space with 1 axis.

dtypeoptional

Data type of each element. Can be provided in any way the numpy.dtype function understands, e.g. as built-in type or as a string. Only real floating-point data types are allowed. For None, the TensorSpace.default_dtype of the created space is used in the form default_dtype(RealNumbers()).

implstr, optional

Impmlementation back-end for the space. See tensor_space_impl_names for available options.

kwargs :

Extra keyword arguments passed to the space constructor.

Returns
real_spaceTensorSpace

See also

tensor_space

Space of tensors with arbitrary scalar data type.

cn

Complex tensor space.

Examples

Space of real 3-tuples with float32 entries:

>>> odl.rn(3, dtype='float32')
rn(3, dtype='float32')

Real 2x3 tensors with float32 entries:

>>> odl.rn((2, 3), dtype='float32')
rn((2, 3), dtype='float32')

The default data type depends on the implementation. For impl='numpy', it is 'float64':

>>> ts = odl.rn((2, 3))
>>> ts
rn((2, 3))
>>> ts.dtype
dtype('float64')