dsp::SpectralKurtosis Class Reference

Perform Spectral Kurtosis on Input Timeseries, creating output Time Series. More...

#include <SpectralKurtosis.h>

Inheritance diagram for dsp::SpectralKurtosis:

Public Member Functions
	SpectralKurtosis ()
	Default constructor.
	~SpectralKurtosis ()
	Destructor.
bool	get_order_supported (TimeSeries::Order order) const
void	load_configuration (const std::string &filename)
	Load configuration from YAML filename.
void	set_M (unsigned _M)
void	set_M (const std::vector< unsigned > &)
void	set_noverlap (unsigned _nover)
	Set the number of overlapping regions per time sample.
void	set_noverlap (const std::vector< unsigned > &)
void	set_thresholds (float _std_devs)
	Set the RFI thresholds with the specified factor.
void	set_thresholds (const std::vector< float > &)
void	set_detect_time_freq (bool flag=true)
	Evaluate SK for every time sample and frequency channel.
void	set_detect_freq (bool flag=true)
	Evaluate SK for every frequency channel after integrating over all time samples.
void	set_detect_time (bool flag=true)
	Evaluate SK for every time sample after integrating over all frequency channels.
void	set_omit_outliers (bool flag=true)
	On detecting an outlier, omit sample from any future computation of SK. More...
unsigned	get_nchan () const
	Get the number of frequency channels for which SK is computed.
unsigned	get_npol () const
	Get the number of polarizations for which SK is computed.
void	set_channel_range (unsigned start, unsigned end)
	Set the channel range to conduct detection.
void	reserve ()
	Reserve the maximum amount of memory required. More...
void	prepare ()
	Prepare for data operations. More...
void	prepare_output ()
double	get_delay_time () const override
	Get the time delay of this operation, if any, in seconds.
unsigned	get_M () const
	The number of time samples used to calculate the SK statistic.
unsigned	get_excision_threshold () const
	The excision threshold in number of standard deviations.
void	get_filtered_sum (std::vector< float > &sum) const
	Total SK statistic for each poln/channel, post filtering.
void	get_filtered_hits (std::vector< uint64_t > &hits) const
	Hits on filtered average for each channel.
void	get_unfiltered_sum (std::vector< float > &sum) const
	Total SK statistic for each poln/channel, before filtering.
uint64_t	get_unfiltered_hits () const
	Hits on unfiltered SK statistic, same for each channel.
void	reset_count ()
	The arrays will be reset when count_zapped is next called.
void	set_engine (Engine *)
bool	get_report () const
void	set_report (bool _report)
bool	has_zero_DM_input () const
	Return true if the zero_DM_input attribute has been set.
virtual void	set_zero_DM_input (TimeSeries *zero_DM_input)
virtual const TimeSeries *	get_zero_DM_input () const
virtual TimeSeries *	get_zero_DM_input ()
virtual void	set_zero_DM_buffering_policy (BufferingPolicy *policy)
bool	has_zero_DM_buffering_policy () const
BufferingPolicy *	get_zero_DM_buffering_policy () const
bool	get_zero_DM () const
	get the zero_DM flag
void	set_zero_DM (bool _zero_DM)
	set the zero_DM flag
Public Member Functions inherited from dsp::Transformation< TimeSeries, TimeSeries >
	Transformation (const char *_name, Behaviour _type)
	All sub-classes must specify name and capacity for inplace operation.
virtual	~Transformation ()
	Destructor.
void	reserve ()
	Set the size of the output to that of the input by default.
void	set_input (const TimeSeries *input)
	Set the container from which input data will be read.
void	set_output (TimeSeries *output)
	Set the container into which output data will be written.
Behaviour	get_type () const
	Return the Transformation type.
virtual void	set_buffering_policy (BufferingPolicy *policy)
	Set the policy for buffering input and/or output data.
bool	has_buffering_policy () const
	Returns true if buffering_policy is set.
BufferingPolicy *	get_buffering_policy () const
void	reset_min_samps ()
	Reset minimum_samps_can_process.
std::string	name (const std::string &function) const
	String preceding output in verbose mode.
virtual void	set_cerr (std::ostream &os) const
	Set verbosity ostream.
Public Member Functions inherited from dsp::Operation
	Operation (const char *name)
	All sub-classes must specify a unique name. More...
	Operation (const Operation &)
	Copy constructor.
virtual	~Operation ()
	Virtual destructor.
virtual bool	operate ()
	Call this method to operate on data Returns false on failure. More...
virtual void	add_extensions (Extensions *)
	Add any extensions.
virtual void	combine (const Operation *)
	Combine accumulated results with another operation. More...
virtual void	report () const
	Report operation statistics.
virtual void	reset ()
	Reset accumulated results to intial values. More...
std::string	get_name () const
	Return the unique name of this operation.
double	get_total_time () const
	Return the total time spent on this Operation in seconds.
double	get_elapsed_time () const
	Get the time spent in the last invocation of operate()
virtual uint64_t	get_total_weights () const
	Return the total number of timesample weights encountered. More...
virtual uint64_t	get_discarded_weights () const
	Return the number of invalid timesample weights encountered.
int	get_id ()
	Inquire the unique instantiation id.
virtual Function	get_function () const
	Get the function classification of this operation.
virtual void	set_scratch (Scratch *)
	Set the scratch space.
bool	scratch_was_set () const
virtual uint64_t	bytes_storage () const
	The number of bytes of additional storage used by the operation.
virtual uint64_t	bytes_scratch () const
	The number of bytes of scratch space used by the operation. More...
Public Member Functions inherited from OwnStream
	OwnStream (const OwnStream &)
const OwnStream &	operator= (const OwnStream &)
virtual void	set_cout (std::ostream &) const
Public Member Functions inherited from Reference::Able
	Able (const Able &)
Able &	operator= (const Able &)
unsigned	get_reference_count () const
Public Member Functions inherited from Reference::HeapTracked
	HeapTracked (const HeapTracked &)
HeapTracked &	operator= (const HeapTracked &)
bool	__is_on_heap () const
Public Member Functions inherited from dsp::HasInput< TimeSeries >
virtual	~HasInput ()
	Destructor.
const TimeSeries *	get_input () const
	Return pointer to the container from which input data will be read.
bool	has_input () const
	Returns true if input is set.
Public Member Functions inherited from dsp::HasOutput< TimeSeries >
virtual	~HasOutput ()
	Destructor.
virtual TimeSeries *	get_output () const
	Return pointer to the container into which output data will be written.
bool	has_output () const
	Returns true if output is set.

Public Attributes
EventEmitter< Reporter< float > >	float_reporter
EventEmitter< Reporter< unsigned char > >	char_reporter
Public Attributes inherited from dsp::Transformation< TimeSeries, TimeSeries >
Callback< Transformation * >	pre_transformation
	Functions called before the transformation takes place.
Callback< Transformation * >	post_transformation
	Functions called after the transformation takes place.

Protected Member Functions
void	transformation ()
	Perform the transformation on the input time series.
Protected Member Functions inherited from dsp::Transformation< TimeSeries, TimeSeries >
virtual bool	can_operate ()
	Return false if the input doesn't have enough data to proceed.
virtual void	operation ()
	Define the Operation pure virtual method.
virtual void	vchecks ()
	Makes sure input & output are okay before calling transformation()
Protected Member Functions inherited from dsp::Operation
virtual void	set_name (const std::string &_name)
	Set the name!
int	timers_index (const std::string &op_name)
	Returns the index in the 'timers' array of a particular timer.
Protected Member Functions inherited from Reference::Able
Handle *	__reference (bool active) const
void	__dereference (bool auto_delete=true) const

Protected Attributes
Reference::To< Engine >	engine
	Interface to alternate processing engine (e.g. GPU)
Protected Attributes inherited from dsp::Transformation< TimeSeries, TimeSeries >
Reference::To< BufferingPolicy >	buffering_policy
	The buffering policy in place (if any)
int64_t	minimum_samps_can_process
	If input doesn't have this many samples, operate() returns false.
Protected Attributes inherited from dsp::Operation
Scratch *	scratch
	Shared scratch space, if needed.
bool	set_scratch_called
std::string	name
	Operation name.
uint64_t	discarded_weights
	Number of time sample weights encountered that are flagged invalid.
uint64_t	total_weights
	Total number of time sample weights encountered.
RealTimer	optime
	Stop watch records the amount of time spent performing this operation.
int	id
	Unique instantiation id.
bool	prepared
	Set true when preparation optimizations are completed.
Protected Attributes inherited from dsp::HasInput< TimeSeries >
Reference::To< const TimeSeries >	input
	Container from which input data will be read.
Protected Attributes inherited from dsp::HasOutput< TimeSeries >
Reference::To< TimeSeries >	output
	Container into which output data will be written.

Additional Inherited Members
Public Types inherited from dsp::Operation
enum	Function { Producer, Procedural, Structural }
	The function of the operator. More...
Static Public Member Functions inherited from Reference::Able
static size_t	get_instance_count ()
Static Public Member Functions inherited from Reference::HeapTracked
static void *	operator new (size_t size, void *ptr=0)
static void	operator delete (void *location, void *ptr)
static void	operator delete (void *location)
static size_t	get_heap_queue_size ()
Static Public Attributes inherited from dsp::Operation
static bool	record_time = false
	Global flag enables stopwatch to record the time spent operating. More...
static bool	report_time = true
	Global flag enables report of time spent in operation on descruction. More...
static bool	verbose = false
	Global verbosity flag.
static int	operation_status = 0
	Operations can set this to non-zero in operation() if they fail.
static bool	check_state = true
	Operations should perform internal consistency checks.
static int	instantiation_count = 0
	Counts how many Operation instantiations there have been Used for setting the unique instantiation ID. More...

Detailed Description

Perform Spectral Kurtosis on Input Timeseries, creating output Time Series.

Output will be in time, frequency, polarization order

Member Function Documentation

prepare()

void dsp::SpectralKurtosis::prepare ( )

virtual

Prepare for data operations.

This method enables optimizations by some derived classes

Reimplemented from dsp::Operation.

References Signal::Coherence, Signal::Intensity, Signal::Nyquist, Signal::PPQQ, and Signal::Stokes.

prepare_output()

void dsp::SpectralKurtosis::prepare_output

(

)

ensure output parameters are configured correctly

References Signal::Intensity, dsp::TimeSeries::OrderTFP, and Signal::PPQQ.

reserve()

void dsp::SpectralKurtosis::reserve ( )

virtual

Reserve the maximum amount of memory required.

This avoids the need to reallocate and copy later

Reimplemented from dsp::Operation.

set_omit_outliers()

void dsp::SpectralKurtosis::set_omit_outliers ( bool  flag = true )

inline

On detecting an outlier, omit sample from any future computation of SK.

This applies when computing SK for multiple resolutions and when integrating over time or frequency.

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

• SpectralKurtosis.h
• SpectralKurtosis.C