arrayfire.index module

Index and Seq classes used in indexing operations.

class arrayfire.index.Index(idx)

Bases: _ctypes.Structure

idx

Structure/Union member

isBatch

Structure/Union member

isSeq

Structure/Union member

class arrayfire.index.ParallelRange(start, stop=None, step=None)

Bases: arrayfire.index.Seq

Class used to parallelize for loop.

Inherits from Seq.

Parameters:

start: number

Beginning of parallel range.

stop : number

End of parallel range.

step : number

Step size for parallel range.

Examples

>>> import arrayfire as af
>>> a = af.randu(3, 3)
>>> b = af.randu(3, 1)
>>> c = af.constant(0, 3, 3)
>>> for ii in af.ParallelRange(3):
...     c[:, ii] = a[:, ii] + b
...
>>> af.display(a)
[3 3 1 1]
    0.4107     0.1794     0.3775
    0.8224     0.4198     0.3027
    0.9518     0.0081     0.6456

>>> af.display(b)
[3 1 1 1]
    0.7269
    0.7104
    0.5201

>>> af.display(c)
[3 3 1 1]
    1.1377     0.9063     1.1045
    1.5328     1.1302     1.0131
    1.4719     0.5282     1.1657

Attributes

S: slice

Methods

next()

Function called by the iterator in Python 2

next()

Function called by the iterator in Python 2

class arrayfire.index.Seq(S)

Bases: _ctypes.Structure

arrayfire equivalent of slice

Parameters:S: slice or number.

Attributes

begin: number	Start of the sequence.
end	(number) End of sequence.
step	(number) Step size.

begin

Structure/Union member

end

Structure/Union member

step

Structure/Union member