FFT Class Reference

#include <FFT.h>

Inheritance diagram for FFT:

List of all members.

Public Member Functions
	FFT (ApplicationWindow *parent, Table *t, const QString &realColName, const QString &imagColName=QString())
	FFT (ApplicationWindow *parent, Graph *g, const QString &curveTitle)
void	normalizeAmplitudes (bool norm=true)
void	setInverseFFT (bool inverse=true)
void	setSampling (double sampling)
void	shiftFrequencies (bool shift=true)
Public Member Functions inherited from Filter
int	dataSize ()
	Returns the size of the fitted data set.
bool	error ()
	Filter (ApplicationWindow *parent, Table *t=0, const char *name=0)
	Filter (ApplicationWindow *parent, Graph *g=0, const char *name=0)
virtual QString	legendInfo ()
	Output string added to the plot as a new legend.
virtual bool	run ()
	Actually does the job. Should be reimplemented in derived classes.
void	setColor (int colorId)
	Sets the color of the output fit curve.
void	setColor (const QString &colorName)
	Sets the color of the output fit curve. Provided for convenience. To be used in scripts only!
virtual void	setDataCurve (int curve, double start, double end)
bool	setDataFromCurve (const QString &curveTitle, Graph *g=0)
bool	setDataFromCurve (const QString &curveTitle, double from, double to, Graph *g=0)
void	setInterval (double from, double to)
	Changes the data range if the source curve was already assigned. Provided for convenience.
void	setMaximumIterations (int iter)
	Sets the maximum number of iterations to be performed during an iterative session.
void	setOutputPoints (int points)
	Sets the number of points in the output curve.
void	setOutputPrecision (int digits)
	Sets the precision used for the output.
void	setTolerance (double eps)
	Sets the tolerance used by the GSL routines.
virtual void	showLegend ()
	Adds a new legend to the plot. Calls virtual legendInfo()
	~Filter ()

Private Member Functions
QList< Column * >	fftCurve ()
QList< Column * >	fftTable ()
void	init ()
void	output ()
	Performs the data analysis and takes care of the output.
void	output (QList< Column * > columns)
void	setDataFromTable (Table *t, const QString &realColName, const QString &imagColName=QString())

Private Attributes
int	d_imag_col
bool	d_inverse
	Flag telling if an inverse FFT must be performed.
bool	d_normalize
	Flag telling if the amplitudes in the output spectrum must be normalized.
int	d_real_col
double	d_sampling
bool	d_shift_order
	Flag telling if the output frequencies must be shifted in order to have a zero-centered spectrum.

Additional Inherited Members
Protected Member Functions inherited from Filter
QwtPlotCurve *	addResultCurve (double *x, double *y)
	Adds the result curve to the target output plot window. Creates a hidden table and frees the input data from memory.
virtual void	calculateOutputData (double *X, double *Y)
	Calculates the data for the output curve and store it in the X an Y vectors.
int	curveIndex (const QString &curveTitle, Graph *g)
	Performs checks and returns the index of the source data curve if OK, -1 otherwise.
virtual bool	isDataAcceptable ()
virtual QString	logInfo ()
	Output string added to the log pannel of the application.
Protected Attributes inherited from Filter
QwtPlotCurve *	d_curve
	The curve to be analysed.
int	d_curveColorIndex
	Color index of the result curve.
QString	d_explanation
	String explaining the operation in the comment of the result table and in the project explorer.
double	d_from
	Data interval.
Graph *	d_graph
	The graph where the result curve should be displayed.
bool	d_init_err
	Error flag telling if something went wrong during the initialization phase.
int	d_max_iterations
	Maximum number of iterations per fit.
int	d_min_points
	Minimum number of data points necessary to perform the operation.
int	d_n
	Size of the data arrays.
int	d_points
	Number of result points to de calculated and displayed in the output curve.
int	d_prec
	Precision (number of significant digits) used for the results output.
bool	d_sort_data
	Specifies if the filter needs sorted data as input.
Table *	d_table
	A table source of data.
double	d_to
double	d_tolerance
	GSL Tolerance, if ever needed...
double *	d_x
	x data set to be analysed
double *	d_y
	y data set to be analysed

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Constructor & Destructor Documentation

FFT::FFT	(	ApplicationWindow *	parent,
		Table *	t,
		const QString &	realColName,
		const QString &	imagColName = QString()
	)

References init(), and setDataFromTable().

FFT::FFT	(	ApplicationWindow *	parent,
		Graph *	g,
		const QString &	curveTitle
	)

References init(), and Filter::setDataFromCurve().

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Member Function Documentation

QList< Column * > FFT::fftCurve ( )

private

References Filter::d_curve, Filter::d_explanation, Filter::d_init_err, d_inverse, Filter::d_n, d_normalize, d_sampling, d_shift_order, Filter::d_x, Filter::d_y, SciDAVis::Numeric, SciDAVis::X, and SciDAVis::Y.

Referenced by output().

QList< Column * > FFT::fftTable ( )

private

References Filter::d_init_err, d_inverse, d_normalize, d_sampling, d_shift_order, Filter::d_table, Filter::d_x, Filter::d_y, SciDAVis::Numeric, Table::numRows(), SciDAVis::X, and SciDAVis::Y.

Referenced by output().

void FFT::init ( )

private

Reimplemented from Filter.

References d_imag_col, d_inverse, d_normalize, d_real_col, d_sampling, and d_shift_order.

Referenced by FFT().

void FFT::normalizeAmplitudes ( bool  norm = true )

inline

References d_normalize.

Referenced by FFTDialog::accept().

void FFT::output ( )

privatevirtual

Performs the data analysis and takes care of the output.

Reimplemented from Filter.

References Filter::d_curve, Filter::d_graph, Filter::d_table, fftCurve(), and fftTable().

void FFT::output ( QList< Column * >  columns )

private

References MultiLayer::activeGraph(), ColorBox::color(), Filter::d_curveColorIndex, Filter::d_explanation, d_inverse, ApplicationWindow::generateUniqueName(), ApplicationWindow::multilayerPlot(), ApplicationWindow::newHiddenTable(), Graph::plotWidget(), and Graph::setCurvePen().

void FFT::setDataFromTable ( Table *  t, const QString &  realColName, const QString &  imagColName = QString()  )

private

References Table::cell(), Table::colIndex(), d_imag_col, Filter::d_init_err, Filter::d_n, d_real_col, Filter::d_table, Filter::d_x, Filter::d_y, and Table::numRows().

Referenced by FFT().

void FFT::setInverseFFT ( bool  inverse = true )

inline

References d_inverse.

Referenced by FFTDialog::accept().

void FFT::setSampling ( double  sampling )

inline

References d_sampling.

Referenced by FFTDialog::accept().

void FFT::shiftFrequencies ( bool  shift = true )

inline

References d_shift_order.

Referenced by FFTDialog::accept().

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Member Data Documentation

int FFT::d_imag_col

private

Referenced by init(), and setDataFromTable().

bool FFT::d_inverse

private

Flag telling if an inverse FFT must be performed.

Referenced by fftCurve(), fftTable(), init(), output(), and setInverseFFT().

bool FFT::d_normalize

private

Flag telling if the amplitudes in the output spectrum must be normalized.

Referenced by fftCurve(), fftTable(), init(), and normalizeAmplitudes().

int FFT::d_real_col

private

Referenced by init(), and setDataFromTable().

double FFT::d_sampling

private

Referenced by fftCurve(), fftTable(), init(), and setSampling().

bool FFT::d_shift_order

private

Flag telling if the output frequencies must be shifted in order to have a zero-centered spectrum.

Referenced by fftCurve(), fftTable(), init(), and shiftFrequencies().

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

• scidavis/src/FFT.h
• scidavis/src/FFT.cpp