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ift
NIFTy
Commits
b3779f25
Commit
b3779f25
authored
May 22, 2017
by
Theo Steininger
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Small fixes in the wording.
parent
30f0c275
Pipeline
#12808
passed with stage
in 4 minutes and 26 seconds
Changes
2
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1
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2 changed files
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31 additions
and
25 deletions
+31
-25
nifty/field.py
nifty/field.py
+16
-14
nifty/sugar.py
nifty/sugar.py
+15
-11
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nifty/field.py
View file @
b3779f25
...
...
@@ -270,7 +270,7 @@ class Field(Loggable, Versionable, object):
def
power_analyze
(
self
,
spaces
=
None
,
logarithmic
=
False
,
nbin
=
None
,
binbounds
=
None
,
decompose_power
=
True
):
""" Computes the square root power spectrum for a subspace of
the Field
.
""" Computes the square root power spectrum for a subspace of
`self`
.
Creates a PowerSpace for the space addressed by `spaces` with the given
binning and computes the power spectrum as a Field over this
...
...
@@ -457,16 +457,10 @@ class Field(Loggable, Versionable, object):
def
power_synthesize
(
self
,
spaces
=
None
,
real_power
=
True
,
real_signal
=
True
,
mean
=
None
,
std
=
None
):
"""
Yields a sampled field with this field squared
as its power spectrum.
"""
Yields a sampled field with `self`**2
as its power spectrum.
This method draws a Gaussian random field in the harmonic partner domain
of this fields domains, using this field as power spectrum.
Notes
-----
For this the spaces specified by `spaces` must be a PowerSpace.
This expects this field to be the square root of a power spectrum, i.e.
to have the unit of the field to be sampled.
This method draws a Gaussian random field in the harmonic partner
domain of this fields domains, using this field as power spectrum.
Parameters
----------
...
...
@@ -495,12 +489,20 @@ class Field(Loggable, Versionable, object):
The output object. A random field created with the power spectrum
stored in the `spaces` in `self`.
Notes
-----
For this the spaces specified by `spaces` must be a PowerSpace.
This expects this field to be the square root of a power spectrum, i.e.
to have the unit of the field to be sampled.
See Also
--------
power_analyze
Raises
------
ValueError : If domain is not a PowerSpace
ValueError : If domain specified by `spaces` is not a PowerSpace.
"""
# check if the `spaces` input is valid
...
...
nifty/sugar.py
View file @
b3779f25
...
...
@@ -26,30 +26,34 @@ __all__ = ['create_power_operator']
def
create_power_operator
(
domain
,
power_spectrum
,
dtype
=
None
,
distribution_strategy
=
'not'
):
""" Creates a diagonal operator with a certain power spectrum.
""" Creates a diagonal operator with the given power spectrum.
Constructs a diagonal operator that lives over the specified domain, or
its harmonic domain in case it is not harmonic.
its default harmonic codomain in case it is not harmonic.
Parameters
----------
domain : DomainObject
Domain over which the power operator shall live. If this is not a
harmonic domain, it will return an operator for its harmonic domain
harmonic domain, it will return an operator for its harmonic
co
domain
instead.
power_spectrum :
{array-like, method}
power_spectrum :
(array-like, method)
An array-like object, or a method that implements the square root
of a power spectrum as a function of k.
dtype : type
,
*optional*
dtype : type *optional*
dtype that the field holding the power spectrum shall use
{default : None}
if dtype == None:
passes this on to constructor of Field
distribution_strategy : string
,
*optional*
(default : None).
if dtype == None:
the dtype of `power_spectrum` will be used.
distribution_strategy : string *optional*
Distributed strategy to be used by the underlying d2o objects.
{default : 'not'}
(default : 'not')
Returns
-------
DiagonalOperator : An operator that
lives that implements the given power
spectrum.
DiagonalOperator : An operator that
implements the given power spectrum.
"""
if
not
domain
.
harmonic
:
fft
=
FFTOperator
(
domain
)
domain
=
fft
.
target
[
0
]
...
...
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