fosanalysis.preprocessing.resizing.Resampler Class Reference

Class for resampling one-dimensional or two-dimensional strain data. More...

Inheritance diagram for fosanalysis.preprocessing.resizing.Resampler:

Public Member Functions
	__init__ (self, np.array target_x=None, np.array target_time=None, str method=None, dict method_kwargs=None, str timespace="1d_space", *args, **kwargs)
	Construct a Resampler instance.
Public Member Functions inherited from fosanalysis.preprocessing.base.Task
	__init__ (self, str timespace="1d_space", *args, **kwargs)
	Construct an instance of the class.
tuple	run (self, np.array x=None, np.array y=None, np.array z=None, bool make_copy=True, str timespace=None, *args, **kwargs)
	Each preprocessing.Task object has a run() method.
Public Member Functions inherited from fosanalysis.preprocessing.base.Base
	__init__ (self, *args, **kwargs)
	Construct an instance of the class.
Public Member Functions inherited from fosanalysis.utils.base.Task
	__init__ (self, *args, **kwargs)
Public Member Functions inherited from fosanalysis.utils.base.Base
	__init__ (self, *args, **kwargs)
	Construct the object and warn about unused/unknown arguments.

Public Attributes
	method = method
	Name of the interpolation method used.
	method_kwargs = method_kwargs if method_kwargs is not None else {}
	Additional keyword arguments for the interpolation function.
	target_time = target_time
	Points in time, where strain values should be resampled.
	target_x = target_x
	Points in space, where strain values should be resampled.
Public Attributes inherited from fosanalysis.preprocessing.base.Task
	timespace = timespace
	Indicator, which approach is used for operations on a 2d array.

Protected Member Functions
tuple	_run_1d (self, np.array x, np.array z, *args, **kwargs)
	Resamples (by interpolating) one-dimensional data.
tuple	_run_2d (self, np.array x, np.array y, np.array z, *args, **kwargs)
	Resample a strain array using both spatial and temporal coordinates.
Protected Member Functions inherited from fosanalysis.preprocessing.base.Task
tuple	_map_2d (self, np.array x, np.array y, np.array z, str timespace=None, *args, **kwargs)
	Apply the 1D operation along either the space or time timespace.

Detailed Description

Class for resampling one-dimensional or two-dimensional strain data.

In contrast, to Downsampler, the target points are given in the respective dimensions (datetime.datetime objects in time; sensor coordinates in space) and irregular spacing along an axis is possible.

Definition at line 318 of file resizing.py.

Constructor & Destructor Documentation

__init__()

fosanalysis.preprocessing.resizing.Resampler.__init__	(		self,
		np.array	target_x = None,
		np.array	target_time = None,
		str	method = None,
		dict	method_kwargs = None,
		str	timespace = "1d_space",
		*	args,
		**	kwargs )

Construct a Resampler instance.

Parameters

target_x

Points in space, where strain values should be resampled.

Parameters

target_time

Points in time, where strain values should be resampled.

Parameters

method

Name of the interpolation method used.

For 1D operation, this is either a function object or a string representing a function name, which will be passed to fosanalysis.utils.interpolation.scipy_interpolate1d(), defaulting to "interp1d".

For 2D operation, use one of the options for the method keyword argument accepted by scipy.interpolate.interpn(), defaulting to "linear".

Parameters

method_kwargs

Additional keyword arguments for the interpolation function.

Parameters

timespace

Indicator, which approach is used for operations on a 2d array.

Available options:

• "2D": Use the native 2D implementation.
• "1d_space": Use the native 1D implementation, in the space domain. This is repeated for each time stamp in the measurement campaign. An iteration step processes a complete reading of sensor length.
• "1d_time": Use the native 1D implementation, in the time domain. This is repeated for each gage location along the sensor. An iteration step processes a time series for a sensor position.

  Parameters

  *args	Additional positional arguments, will be passed to the superconstructor.
  **kwargs	Additional keyword arguments, will be passed to the superconstructor.

Definition at line 325 of file resizing.py.

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Member Function Documentation

_run_1d()

tuple fosanalysis.preprocessing.resizing.Resampler._run_1d ( self, np.array x, np.array z, * args, ** kwargs )

protected

Resamples (by interpolating) one-dimensional data.

Parameters

x	Array of measuring point positions or time stamps
z	Array of strain data in accordance to x.
*args	Additional positional arguments, ignored.
**kwargs	Additional keyword arguments, ignored.

Returns

Returns a tuple like (target_x, target_z).

Return values

target_x	Array of target points (space or time).
target_z	Array of resampled strain.

Reimplemented from fosanalysis.preprocessing.base.Task.

Definition at line 359 of file resizing.py.

_run_2d()

tuple fosanalysis.preprocessing.resizing.Resampler._run_2d ( self, np.array x, np.array y, np.array z, * args, ** kwargs )

protected

Resample a strain array using both spatial and temporal coordinates.

Parameters

x	Original spatial (x-coordinate) data.
y	Original temporal (y-coordinate) data.
z	Original strain values.
*args	Additional positional arguments, ignored.
**kwargs	Additional keyword arguments, ignored.

Returns

Returns a tuple like (x, y, z).

Return values

x	This is the target_x
y	target_time
z	Resampled strain array, according to target_x and target_time.

Reimplemented from fosanalysis.preprocessing.base.Task.

Definition at line 387 of file resizing.py.

Member Data Documentation

method

fosanalysis.preprocessing.resizing.Resampler.method = method

Name of the interpolation method used.

For 1D operation, this is either a function object or a string representing a function name, which will be passed to fosanalysis.utils.interpolation.scipy_interpolate1d(), defaulting to "interp1d".

For 2D operation, use one of the options for the method keyword argument accepted by scipy.interpolate.interpn(), defaulting to "linear".

Definition at line 356 of file resizing.py.

method_kwargs

fosanalysis.preprocessing.resizing.Resampler.method_kwargs = method_kwargs if method_kwargs is not None else {}

Additional keyword arguments for the interpolation function.

Definition at line 358 of file resizing.py.

target_time

fosanalysis.preprocessing.resizing.Resampler.target_time = target_time

Points in time, where strain values should be resampled.

Definition at line 346 of file resizing.py.

target_x

fosanalysis.preprocessing.resizing.Resampler.target_x = target_x

Points in space, where strain values should be resampled.

Definition at line 344 of file resizing.py.

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The documentation for this class was generated from the following file:

• src/fosanalysis/preprocessing/resizing.py