nmrglue.fileio.fileiobase.data_nd

class nmrglue.fileio.fileiobase.data_nd(order)

Base class for building objects which emulate ndarray objects without loading data into memory. These object have the following properties:

• slicing operations return ndarray objects

• can iterate over with expected results

• transpose and swapaxes functions create a new data_nd object with the new axes ordering

• has ndim, shape, and dtype attributes.

Notes

Classes which are use this class as a base should define the following methods:

__init__ which must set up the object and defines at minimum:

self.fshapetuple

Shape of the data on disk, the shape when order = (0, 1, 2, ..)

self.ordertuple

Ordering of the axes

self.dtypedtype

Dtype of the emulated ndarray

self.__setdimandshape__ should be called if self.dim and self.shape

are not set up __init__.

__fgetitem__ which takes a well formatted tuple of slices and returns a

ndarray object with the selected data

__fcopy__(self, order) which created a copy of the object with the new

order

__init__(order)

Methods

__init__(order)
swapaxes(axis1, axis2)	Return object with axis1 and axis2 interchanged.
transpose(*axes)	Return object with axes transposed.