This implements line plots where the data is taken from a user supplied function The function is defined as a string and parsed by JKMathParser. More...

#include <jkqtpparsedfunction.h>

Inheritance diagram for JKQTPYParsedFunctionLineGraph:

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Collaboration diagram for JKQTPYParsedFunctionLineGraph:

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Public Member Functions
	JKQTPYParsedFunctionLineGraph (const QString &function, JKQTBasePlotter *parent=nullptr)
	class constructor

	JKQTPYParsedFunctionLineGraph (const QString &function, JKQTPlotter *parent)
	class constructor

	JKQTPYParsedFunctionLineGraph (JKQTBasePlotter *parent=nullptr)
	class constructor

	JKQTPYParsedFunctionLineGraph (JKQTPlotter *parent)
	class constructor

virtual	~JKQTPYParsedFunctionLineGraph () override
	class destructor

virtual void	draw (JKQTPEnhancedPainter &painter) override
	plots the graph to the plotter object specified as parent

Public Member Functions inherited from JKQTPParsedFunctionLineGraphBase
	JKQTPParsedFunctionLineGraphBase (const QString &dependentVariableName, const QString &function, JKQTBasePlotter *parent=nullptr)
	class constructor

	JKQTPParsedFunctionLineGraphBase (const QString &dependentVariableName, const QString &function, JKQTPlotter *parent)
	class constructor

	JKQTPParsedFunctionLineGraphBase (const QString &dependentVariableName, JKQTBasePlotter *parent=nullptr)
	class constructor

	JKQTPParsedFunctionLineGraphBase (const QString &dependentVariableName, JKQTPlotter *parent)
	class constructor

virtual	~JKQTPParsedFunctionLineGraphBase () override
	class destructor

QString	getDependentVariableName () const
	nache of the dependent variable (e.g. x for a function f(x) )

QString	getErrorFunction () const
	the function to be evaluated to add error indicators to the graph. This function is evaluated to an error for every x. Use `x` as the free variable, e.g. `"x^2+2"`.

QString	getFunction () const
	the function to be evaluated for the plot. Use `x` as the free variable, e.g. `"x^2+2"`

Public Member Functions inherited from JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase
	JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase (JKQTBasePlotter *parent=nullptr)
	class constructor

	JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase (JKQTPlotter *parent)
	class constructor

virtual	~JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase () override
	class destructor

virtual void	drawKeyMarker (JKQTPEnhancedPainter &painter, const QRectF &rect) override
	plots a key marker inside the specified rectangle rect

bool	getDrawErrorLines () const
	indicates whether error lines should be drawn

bool	getDrawErrorPolygons () const
	indicates whether an error polygon should be drawn

virtual QColor	getErrorFillColor () const
	color of the error graph fill

virtual Qt::BrushStyle	getErrorFillStyle () const
	fill style, if the error curve should be filled

virtual QColor	getErrorLineColor () const
	color of the error graph

virtual Qt::PenStyle	getErrorLineStyle () const
	linestyle of the error graph lines

virtual double	getErrorLineWidth () const
	width (pixels) of the error graph

virtual QColor	getKeyLabelColor () const override
	returns the color to be used for the key label

Public Member Functions inherited from JKQTPEvaluatedFunctionWithErrorsGraphBase
	JKQTPEvaluatedFunctionWithErrorsGraphBase (JKQTBasePlotter *parent=nullptr)
	class constructor

	JKQTPEvaluatedFunctionWithErrorsGraphBase (JKQTPlotter *parent)
	class constructor

virtual	~JKQTPEvaluatedFunctionWithErrorsGraphBase ()
	class destructor

int	getErrorParameterColumn () const
	if set, the values from this datatsore column are used for the parameters `p1` , `p2` , `p3` , ... of the error plot function

QVector< double > &	getInternalErrorParams ()
	returns the currently set internal parameter vector

const QVector< double > &	getInternalErrorParams () const
	returns the currently set internal parameter vector

virtual bool	usesColumn (int c) const override
	returns `true` if the given column is used by the graph

Public Member Functions inherited from JKQTPEvaluatedFunctionGraphBase
	JKQTPEvaluatedFunctionGraphBase (JKQTBasePlotter *parent=nullptr)
	class constructor

	JKQTPEvaluatedFunctionGraphBase (JKQTPlotter *parent)
	class constructor

virtual	~JKQTPEvaluatedFunctionGraphBase ()
	class destructor

double	getDataCleanupMaxAllowedAngleDegree () const
	in the clean-up step of plot-data creation, a point is removed from the data, if it caused its neighboring line-segments to form an angle less than this value, given in degrees.

bool	getDisplaySamplePoints () const
	if true [default: off] display the points where the function has been sampled

QVector< double > &	getInternalParams ()
	returns the currently set internal parameter vector

const QVector< double > &	getInternalParams () const
	returns the currently set internal parameter vector

unsigned int	getMaxRefinementDegree () const
	the maximum number of recursive refinement steps

double	getMinPixelPerSample () const
	create one sample at least every minPixelPerSample pixels

unsigned int	getMinSamples () const
	the minimum number of points to evaluate the function at

int	getParameterColumn () const
	if set, the values from this datatsore column are used for the parameters `p1` , `p2` , `p3` , ... of the plot function

double	getSlopeTolerance () const
	the tolerance for the difference of two subsequent slopes

virtual bool	getXMinMax (double &minx, double &maxx, double &smallestGreaterZero) override
	get the maximum and minimum x-value of the graph

virtual bool	getYMinMax (double &miny, double &maxy, double &smallestGreaterZero) override
	get the maximum and minimum y-value of the graph

void	setCopiedParams (const double *params, int N)
	sets the params from a copy of the given array of length N

virtual void	setParams (const QVector< double > &params)
	sets the params as a pointer to an internal COPY of the given vector (not the data of the vector, as then the size would be unknown!!!)

Public Member Functions inherited from JKQTPGraph
	JKQTPGraph (JKQTBasePlotter *parent=nullptr)
	class constructor

virtual	~JKQTPGraph ()=default
	default wirtual destructor

Public Member Functions inherited from JKQTPPlotElement
	JKQTPPlotElement (JKQTBasePlotter *parent=nullptr)
	class constructor

virtual	~JKQTPPlotElement ()=default
	default wirtual destructor

QPointF	backTransform (const QPointF &x) const
	tool routine that back-transforms a QPointF according to the parent's transformation rules (pixels --> plot coordinate)

QPointF	backTransform (double x, double y) const
	tool routine that back-transforms a QPointF according to the parent's transformation rules (pixels --> plot coordinate)

double	backtransformX (double x) const
	tool routine that backtransforms an x-coordinate (pixels --> plot coordinate) for this plot element, uses the axis referenced in xAxisRef

double	backtransformY (double y) const
	tool routine that backtransforms a y-coordinate (pixels --> plot coordinate) for this plot element, uses the axis referenced in yAxisRef

virtual void	drawOutside (JKQTPEnhancedPainter &painter, QRect leftSpace, QRect rightSpace, QRect topSpace, QRect bottomSpace)
	plots outside the actual plot field of view (e.g. color bars, scale bars, ...)

QImage	generateKeyMarker (QSize size=QSize(16, 16))
	returns an image with a key marker inside

virtual void	getOutsideSize (JKQTPEnhancedPainter &painter, int &leftSpace, int &rightSpace, int &topSpace, int &bottomSpace)
	if the graph plots outside the actual plot field of view (e.g. color bars, scale bars, ...)

JKQTBasePlotter *	getParent ()
	returns the parent painter class

const JKQTBasePlotter *	getParent () const
	returns the parent painter class

QString	getTitle () const
	returns the the title of the plot

const JKQTPCoordinateAxis *	getXAxis () const
	returns the actual x-Axis-object from the parent plotter, referenced in xAxisRef

JKQTPCoordinateAxisRef	getXAxisRef () const
	indicates which coordinate axis to use for coordinate transforms in x-direction

const JKQTPCoordinateAxis *	getYAxis () const
	returns the actual y-Axis-object from the parent plotter, referenced in yAxisRef

JKQTPCoordinateAxisRef	getYAxisRef () const
	indicates which coordinate axis to use for coordinate transforms in y-direction

virtual double	hitTest (const QPointF &posSystem, QPointF closestSpotSystem=nullptr, QString label=nullptr, HitTestMode mode=HitTestXY) const
	returns the closest distance of the plot element to the (screen pixel) position pos, or `NAN`

bool	isHighlighted () const
	returns whether the graph is shown in a highlighted style in the plot

bool	isVisible () const
	returns whether the graph is visible in the plot

void	setAxes (JKQTPCoordinateAxisRef ref)
	set the coordinate axes to use for this plot element

virtual void	setParent (JKQTBasePlotter *parent)
	sets the parent painter class

virtual void	setParent (JKQTPlotter *parent)
	sets the parent painter class

void	setXAxis (JKQTPCoordinateAxisRef ref)
	indicates which coordinate axis to use for coordinate transforms in x-direction

void	setYAxis (JKQTPCoordinateAxisRef ref)
	indicates which coordinate axis to use for coordinate transforms in y-direction

QPointF	transform (const QPointF &x) const
	tool routine that transforms a QPointF according to the parent's transformation rules (plot coordinate --> pixels)

QPolygonF	transform (const QPolygonF &x) const
	tool routine that transforms a QPolygonF according to the parent's transformation rules (plot coordinate --> pixels)

QPointF	transform (double x, double y) const
	tool routine that transforms a QPointF according to the parent's transformation rules (plot coordinate --> pixels)

QPainterPath	transformToLinePath (const QPolygonF &x) const
	tool routine that transforms a QPolygonF according to the parent's transformation rules and returns a (non-closed) path consisting of lines (plot coordinate --> pixels)

QVector< double >	transformX (const QVector< double > &x) const
	transform all x-coordinates in a vector x

double	transformX (double x) const
	tool routine that transforms an x-coordinate (plot coordinate --> pixels) for this plot element, uses the axis referenced in xAxisRef

QVector< double >	transformY (const QVector< double > &x) const
	transform all y-coordinates in a vector x

double	transformY (double y) const
	tool routine that transforms a y-coordinate (plot coordinate --> pixels) for this plot element, uses the axis referenced in yAxisRef

Public Member Functions inherited from JKQTPGraphLineAndFillStyleMixin
	JKQTPGraphLineAndFillStyleMixin ()
	class constructor

bool	doDrawLine () const
	indicates whether to draw a line on the circumference of the described area (i.e. along the data points from `xColumn` and `yColumn` as well as `xColumn` and `yColumn2` or not

bool	doFillCurve () const
	indicates whether to fill the space between the curve and the x-axis

bool	getDrawLine () const
	indicates whether to draw a line on the circumference of the described area (i.e. along the data points from `xColumn` and `yColumn` as well as `xColumn` and `yColumn2` or not

bool	getFillCurve () const
	indicates whether to fill the space between the curve and the x-axis

void	setDrawLine (bool __value)
	indicates whether to draw a line on the circumference of the described area (i.e. along the data points from `xColumn` and `yColumn` as well as `xColumn` and `yColumn2` or not

void	setFillCurve (bool __value)
	indicates whether to fill the space between the curve and the x-axis

Public Member Functions inherited from JKQTPGraphFillStyleMixin
	JKQTPGraphFillStyleMixin ()
	class constructor

virtual	~JKQTPGraphFillStyleMixin ()

QBrush	getFillBrush (JKQTPEnhancedPainter &painter, JKQTBasePlotter *parent) const
	constructs a QBrush from the graph fill styling properties

QColor	getFillColor () const
	set the color of the graph filling

const QGradient *	getFillGradient () const
	get the gradient object of the graph filling

Qt::BrushStyle	getFillStyle () const
	get the fill style of the graph

QPixmap	getFillTexture () const
	set the color of the graph filling

QImage	getFillTextureImage () const
	set the color of the graph filling

void	initFillStyle (JKQTBasePlotter *parent, int &parentPlotStyle, JKQTPPlotStyleType styletype=JKQTPPlotStyleType::Default)
	initiaize the fill style (from the parent plotter)

void	initFillStyleInvertedColor (JKQTPGraphFillStyleMixin *other)
	initiaize the fill style from another JKQTPGraphFillStyleMixin other by inverting its fill color

void	setFillBrush (const QBrush &b)
	sets a fill brush (overwrites all internal properties!)

void	setFillColor (const QColor &__value)
	set the color of the graph filling

void	setFillColor (const QColor &__value, double alpha)
	set the color of the graph filling

void	setFillGradient (const QGradient &__value)
	set the filling of the graph to a gradient and sets fill style to a gradient setting

void	setFillStyle (Qt::BrushStyle __value)
	set the fill style of the graph

void	setFillTexture (const QImage &__value)
	set the color of the graph filling and sets fill style to Qt::TexturePattern

void	setFillTexture (const QPixmap &__value)
	set the color of the graph filling and sets fill style to Qt::TexturePattern

void	setFillTransform (const QTransform &b)
	sets a fill transformation

Public Member Functions inherited from JKQTPGraphLineStyleMixin
	JKQTPGraphLineStyleMixin ()
	class constructor

virtual	~JKQTPGraphLineStyleMixin ()

QColor	getHighlightingLineColor () const
	get the color of the graph line when highlighted

QPen	getHighlightingLinePen (JKQTPEnhancedPainter &painter, JKQTBasePlotter *parent) const
	constructs a QPen from the line styling properties

QPen	getHighlightingLinePenForRects (JKQTPEnhancedPainter &painter, JKQTBasePlotter *parent) const
	constructs a QPen from the line styling properties, suitable for drawing rectangle with sharp corners

QPen	getKeyLinePen (JKQTPEnhancedPainter &painter, const QRectF &rect, JKQTBasePlotter *parent) const
	constructs a QPen from the line styling properties, but uses getKeyLineWidthPx() for the width, i.e. constructs a pen for drawing lines in key-symbols

double	getKeyLineWidthPx (JKQTPEnhancedPainter &painter, const QRectF &keyRect, const JKQTBasePlotter *parent) const
	returns the linewidth for drawing lines in a key entry with keyRect for the symbol, using painter and parent .

QBrush	getLineBrush () const
	gets the brush used to fill the line area

Qt::PenCapStyle	getLineCapStyle () const
	gets the cap style

QColor	getLineColor () const
	get the color of the graph line

qreal	getLineDashOffset () const
	returns the dash offset for a custom dash style

QVector< qreal >	getLineDashPattern () const
	gets the dash pattern for a custom dash style

Qt::PenJoinStyle	getLineJoinStyle () const
	returns the join style

QPen	getLinePen (JKQTPEnhancedPainter &painter, JKQTBasePlotter *parent) const
	constructs a QPen from the line styling properties

QPen	getLinePenForRects (JKQTPEnhancedPainter &painter, JKQTBasePlotter *parent) const
	constructs a QPen from the line styling properties, suitable for drawing rectangles with sharp edges

Qt::PenStyle	getLineStyle () const
	get the style of the graph line

double	getLineWidth () const
	get the line width of the graph line (in pt)

void	initLineStyle (JKQTBasePlotter *parent, int &parentPlotStyle, JKQTPPlotStyleType styletype=JKQTPPlotStyleType::Default)
	initiaize the line style (from the parent plotter)

void	setHighlightingLineColor (const QColor &__value)
	set the color of the graph line when highlighted

void	setHighlightingLineColor (const QColor &__value, double alpha)
	set the color of the graph line when highlighted

void	setLineBrush (const QBrush &style)
	sets the brush used to fill the line area

void	setLineCapStyle (Qt::PenCapStyle style)
	sets the cap style

void	setLineColor (const QColor &__value)
	set the color of the graph line

void	setLineColor (const QColor &__value, double alpha)
	set the color of the graph line

void	setLineColorInvertedFrom (QColor __noninvertedColor)
	sets the line-color as an inverted version of the given color

void	setLineDashOffset (qreal offset)
	sets the dash offset for a custom dash style

void	setLineDashPattern (const QVector< qreal > &pattern)
	sets the dash pattern for a custom dash style

void	setLineJoinStyle (Qt::PenJoinStyle style)
	sets the join style

void	setLineStyle (Qt::PenStyle __value)
	set the style of the graph line

void	setLineWidth (double __value)
	set the line width of the graph line (in pt)

Protected Member Functions
virtual std::function< QPointF(double)>	buildErrorFunctorSpec () override
	this function returns a functor that is used to generate the plot data in coordinate space, based on a range of the dependent variable in coordinate space. In addition it also contains the value range over which to evaluate the functor PlotFunctorSpec::func

virtual PlotFunctorSpec	buildPlotFunctorSpec () override
	this function returns a functor that is used to generate the plot data in coordinate space, based on a range of the dependent variable in coordinate space. In addition it also contains the value range over which to evaluate the functor PlotFunctorSpec::func

Protected Member Functions inherited from JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase
void	drawXGraph (JKQTPEnhancedPainter &painter)
	plots the graph to the plotter object specified as parent

void	drawYGraph (JKQTPEnhancedPainter &painter)
	plots the graph to the plotter object specified as parent

QBrush	getErrorBrush (JKQTPEnhancedPainter &painter) const

QPen	getErrorLinePen (JKQTPEnhancedPainter &painter) const

Protected Member Functions inherited from JKQTPEvaluatedFunctionWithErrorsGraphBase
virtual void	collectParameters () override
	ensure that current function parameters for plotFunction (which may stem from different sources, as direct data, a datastore column ...) are stored in iparams and ierrorparams

Protected Member Functions inherited from JKQTPEvaluatedFunctionGraphBase
virtual void	createPlotData (bool collectParams=true)
	fill the data array with data from the function plotFunction

void	drawSamplePoints (JKQTPEnhancedPainter &painter, QColor graphColor)
	draw all the sample points in data as small symbols

Protected Member Functions inherited from JKQTPGraph
virtual void	drawErrorsAfter (JKQTPEnhancedPainter &)
	this function is used to plot error inidcators after plotting the graphs.

virtual void	drawErrorsBefore (JKQTPEnhancedPainter &)
	this function is used to plot error inidcators before plotting the graphs.

bool	getDataMinMax (int column, double &minx, double &maxx, double &smallestGreaterZero)
	get the maximum and minimum value of the given column

Protected Member Functions inherited from JKQTPPlotElement
void	addHitTestData (const HitTestLocation &loc)
	clear the internal datastore for hitTest()

void	addHitTestData (const QPointF &pos_, const QString &label_)
	clear the internal datastore for hitTest()

void	addHitTestData (const QPointF &pos_, int index_, const QString &label_)
	clear the internal datastore for hitTest()

void	addHitTestData (const QPointF &pos_, int index_=-1, const JKQTPDatastore *datastore=nullptr)
	clear the internal datastore for hitTest(), this variant uses formatHitTestDefaultLabel() to auto-generate the label

void	addHitTestData (double x_, double y_, const QString &label_)
	add a new point on the graph to the internal datastore for hitTest()

void	addHitTestData (double x_, double y_, int index_, const QString &label_)
	clear the internal datastore for hitTest()

void	addHitTestData (double x_, double y_, int index_=-1, const JKQTPDatastore *datastore=nullptr)
	add a new point on the graph to the internal datastore for hitTest(), this variant uses formatHitTestDefaultLabel() to auto-generate the label

void	clearHitTestData ()
	clear the internal datastore for hitTest()

virtual QString	formatHitTestDefaultLabel (double x, double y, int index=-1, const JKQTPDatastore *datastore=nullptr) const
	tool-function for hitTest(), which formats a default label, taking into account the x- and y-position (both provided) and optionally the errors of these positions.

void	reserveHitTestData (int points)
	reserve list entries for up to points graph points in the internal datastore for hitTest()

QString	xFloatToString (double v, int past_comma=-1) const
	converts a x-value v into a string, taking into account the type of x-axis

QString	yFloatToString (double v, int past_comma=-1) const
	converts a x-value v into a string, taking into account the type of x-axis

Additional Inherited Members
Public Types inherited from JKQTPPlotElement
enum	HitTestMode { HitTestXY , HitTestXOnly , HitTestYOnly }
	modes of operation for the function hitTest() More...

Public Slots inherited from JKQTPParsedFunctionLineGraphBase
void	setErrorFunction (const QString &__value)
	the function to be evaluated to add error indicators to the graph. This function is evaluated to an error for every x. Use `x` as the free variable, e.g. `"x^2+2"`.

void	setFunction (const QString &__value)
	the function to be evaluated for the plot. Use `x` as the free variable, e.g. `"x^2+2"`

Public Slots inherited from JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase
void	setColor (QColor c)
	set color, fill color and error color at the same time

void	setDrawErrorLines (bool __value)
	indicates whether error lines should be drawn

void	setDrawErrorPolygons (bool __value)
	indicates whether an error polygon should be drawn

virtual void	setErrorFillColor (const QColor &__value)
	color of the error graph fill

virtual void	setErrorFillStyle (Qt::BrushStyle __value)
	fill style, if the error curve should be filled

virtual void	setErrorLineColor (const QColor &__value)
	color of the error graph

virtual void	setErrorLineStyle (Qt::PenStyle __value)
	linestyle of the error graph lines

virtual void	setErrorLineWidth (double __value)
	width (pixels) of the error graph

Public Slots inherited from JKQTPEvaluatedFunctionWithErrorsGraphBase
void	setErrorParameterColumn (int __value)
	if set, the values from this datatsore column are used for the parameters `p1` , `p2` , `p3` , ... of the error plot function

void	setErrorParameterColumn (size_t __value)
	if set, the values from this datatsore column are used for the parameters `p1` , `p2` , `p3` , ... of the error plot function

void	setErrorParams (const QVector< double > &errorParams)
	sets the error params as a pointer to an internal COPY of the given vector (not the data of the vector, as then the size would be unknown!!!)

void	setErrorParamsV (double p1)
	set the internal error function parameters to {p1}

void	setErrorParamsV (double p1, double p2)
	set the internal error function parameters to {p1,p2}

void	setErrorParamsV (double p1, double p2, double p3)
	set the internal error function parameters to {p1,p2,p3}

void	setErrorParamsV (double p1, double p2, double p3, double p4)
	set the internal error function parameters to {p1,p2,p3,p4}

void	setErrorParamsV (double p1, double p2, double p3, double p4, double p5)
	set the internal error function parameters to {p1,p2,p3,p4,p5}

Public Slots inherited from JKQTPEvaluatedFunctionGraphBase
void	setDataCleanupMaxAllowedAngleDegree (double __value)
	in the clean-up step of plot-data creation, a point is removed from the data, if it caused its neighboring line-segments to form an angle less than this value, given in degrees.

void	setDisplaySamplePoints (bool __value)
	if true [default: off] display the points where the function has been sampled

void	setMaxRefinementDegree (const unsigned int &__value)
	the maximum number of recursive refinement steps

void	setMinPixelPerSample (double __value)
	create one sample at least every minPixelPerSample pixels

void	setMinSamples (const unsigned int &__value)
	the minimum number of points to evaluate the function at

void	setParameterColumn (int __value)
	if set, the values from this datatsore column are used for the parameters `p1` , `p2` , `p3` , ... of the plot function

void	setParameterColumn (size_t __value)
	if set, the values from this datatsore column are used for the parameters `p1` , `p2` , `p3` , ... of the plot function

void	setParamsV (double p1)
	set an internal parameter vector as function parameters, initialized with {p1}

void	setParamsV (double p1, double p2)
	set an internal parameter vector as function parameters, initialized with {p1,p2}

void	setParamsV (double p1, double p2, double p3)
	set an internal parameter vector as function parameters, initialized with {p1,p2,p3}

void	setParamsV (double p1, double p2, double p3, double p4)
	set an internal parameter vector as function parameters, initialized with {p1,p2,p3,p4}

void	setParamsV (double p1, double p2, double p3, double p4, double p5)
	set an internal parameter vector as function parameters, initialized with {p1,p2,p3,p4,p5}

void	setSlopeTolerance (double __value)
	the tolerance for the difference of two subsequent slopes

Public Slots inherited from JKQTPPlotElement
void	setHighlighted (bool __value)
	sets whether the graph is drawn in a highlighted style in the plot

virtual void	setTitle (const QString &__value)
	sets the title of the plot (for display in key!).

void	setVisible (bool __value)
	sets whether the graph is visible in the plot

Static Protected Member Functions inherited from JKQTPParsedFunctionLineGraphBase
static double	evaluateParsedFunction (double x, ParsedFunctionLineGraphFunctionData *fdata)
	implements the actual plot function

Protected Attributes inherited from JKQTPParsedFunctionLineGraphBase
QString	dependentVariableName
	nache of the dependent variable (e.g. x for a function f(x) )

ParsedFunctionLineGraphFunctionData	efdata
	parser data structure for errorFunction

QString	errorFunction
	the function to be evaluated to add error indicators to the graph. This function is evaluated to an error for every x. Use `x` as the free variable, e.g. `"x^2+2"`.

ParsedFunctionLineGraphFunctionData	fdata
	parser data structure for function

QString	function
	the function to be evaluated for the plot. Use `x` as the free variable, e.g. `"x^2+2"`

Protected Attributes inherited from JKQTPEvaluatedFunctionWithErrorsGraphDrawingBase
bool	drawErrorLines
	indicates whether error lines should be drawn

bool	drawErrorPolygons
	indicates whether an error polygon should be drawn

QColor	errorColor
	color of the error graph

QColor	errorFillColor
	color of the error graph fill

Qt::BrushStyle	errorFillStyle
	fill style, if the error curve should be filled

double	errorLineWidth
	width (pixels) of the error graph

Qt::PenStyle	errorStyle
	linestyle of the error graph lines

Protected Attributes inherited from JKQTPEvaluatedFunctionWithErrorsGraphBase
int	errorParameterColumn
	if set, the values from this datatsore column are used for the parameters `p1` , `p2` , `p3` , ... of the error plot function

QVector< double >	ierrorparams
	internal storage for the current error function parameters for errorPlotFunction (which may stem from different sources, as direct data, a datastore column ...)

Protected Attributes inherited from JKQTPEvaluatedFunctionGraphBase
QVector< QPointF >	data
	plot data calculated by createPlotData(), i.e. the datapoints $\mbox{transform}\left(x, y=f(x, \vec{p})\right)$ to be plotted

double	dataCleanupMaxAllowedAngleDegree
	in the clean-up step of plot-data creation, a point is removed from the data, if it caused its neighboring line-segments to form an angle less than this value, given in degrees.

bool	displaySamplePoints
	if true [default: off] display the points where the function has been sampled

QVector< double >	iparams
	internal storage for the current function parameters for plotFunction (which may stem from different sources, as direct data, a datastore column ...)

unsigned int	maxRefinementDegree
	the maximum number of recursive refinement steps

double	minPixelPerSample
	create one sample at least every minPixelPerSample pixels

unsigned int	minSamples
	the minimum number of points to evaluate the function at

int	parameterColumn
	if set, the values from this datatsore column are used for the parameters `p1` , `p2` , `p3` , ... of the plot function

double	slopeTolerance
	the tolerance for the difference of two subsequent slopes

Protected Attributes inherited from JKQTPPlotElement
QVector< HitTestLocation >	m_hitTestData
	dataset with graph-points and associated data from the function hitTest()

JKQTBasePlotter *	parent
	the plotter object this object belongs to

int	parentPlotStyle
	internal storage for the used parent plot style

Properties inherited from JKQTPPlotElement
bool	highlighted
	indicates whether the graph is shown in a "highlghted" in the plot

QString	title
	title of the plot (for display in key!). If no title is supplied, no key entry is drawn.

bool	visible
	indicates whether the graph is visible in the plot

JKQTPCoordinateAxisRef	xAxisRef
	indicates which coordinate axis to use for coordinate transforms in x-direction

JKQTPCoordinateAxisRef	yAxisRef
	indicates which coordinate axis to use for coordinate transforms in y-direction

Properties inherited from JKQTPGraphLineAndFillStyleMixin
bool	drawLine

bool	fillCurve

Properties inherited from JKQTPGraphFillStyleMixin
QColor	fillColor

Qt::BrushStyle	fillStyle

Properties inherited from JKQTPGraphLineStyleMixin
QColor	highlightingLineColor

QColor	lineColor

Qt::PenStyle	lineStyle

double	lineWidth

Detailed Description

This implements line plots where the data is taken from a user supplied function The function is defined as a string and parsed by JKMathParser.

Additional function parameters may be given in the vector parameters. They are accessible in the function as p1 , p2 , p3 , ... Parameters may also be given from a data column. Then first the params from the column and the the parameters from the vector are numbered.

Use the variable y in an equation to refer to the free parameter of the curve (is also understood for convenience).

See also: Example (JKQTPlotter): Plotting Parsed Mathematical Functions as Line Graphs, JKQTPMathParser

Constructor & Destructor Documentation

◆ JKQTPYParsedFunctionLineGraph() [1/4]

JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraph ( JKQTBasePlotter * parent = nullptr )

class constructor

◆ JKQTPYParsedFunctionLineGraph() [2/4]

JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraph ( JKQTPlotter * parent )

class constructor

◆ JKQTPYParsedFunctionLineGraph() [3/4]

JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraph	(	const QString &	function,
		JKQTBasePlotter *	parent = `nullptr`
	)

class constructor

◆ JKQTPYParsedFunctionLineGraph() [4/4]

JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraph	(	const QString &	function,
		JKQTPlotter *	parent
	)

class constructor

◆ ~JKQTPYParsedFunctionLineGraph()

virtual JKQTPYParsedFunctionLineGraph::~JKQTPYParsedFunctionLineGraph ( )

overridevirtual

class destructor

Member Function Documentation

◆ buildErrorFunctorSpec()

virtual std::function< QPointF(double)> JKQTPYParsedFunctionLineGraph::buildErrorFunctorSpec ( )

overrideprotectedvirtual

this function returns a functor that is used to generate the plot data in coordinate space, based on a range of the dependent variable in coordinate space. In addition it also contains the value range over which to evaluate the functor PlotFunctorSpec::func

This function has to be overridden by each class. Depending on the way that class defines the actual plot function, this function has to compose its return type in different ways. The three most common ways are:

plot a function i.e. the plot points will be and the value rage will be the x-axis range. This is implemented by e.g. JKQTPXFunctionLineGraph.
plot a function i.e. the plot points will be and the value rage will be the y-axis range. This is implemented by e.g. JKQTPYFunctionLineGraph.
plot a function $[x,y]=\vec{f}(t)$ i.e. the plot points will be $\vec{f}(t)$ and the value rage will be a user-defined range for . This is implemented by e.g. JKQTPXYFunctionLineGraph. .

Implements JKQTPEvaluatedFunctionWithErrorsGraphBase.

◆ buildPlotFunctorSpec()

virtual PlotFunctorSpec JKQTPYParsedFunctionLineGraph::buildPlotFunctorSpec ( )

overrideprotectedvirtual

this function returns a functor that is used to generate the plot data in coordinate space, based on a range of the dependent variable in coordinate space. In addition it also contains the value range over which to evaluate the functor PlotFunctorSpec::func

This function has to be overridden by each class. Depending on the way that class defines the actual plot function, this function has to compose its return type in different ways. The three most common ways are:

plot a function i.e. the plot points will be and the value rage will be the x-axis range. This is implemented by e.g. JKQTPXFunctionLineGraph.
plot a function i.e. the plot points will be and the value rage will be the y-axis range. This is implemented by e.g. JKQTPYFunctionLineGraph.
plot a function $[x,y]=\vec{f}(t)$ i.e. the plot points will be $\vec{f}(t)$ and the value rage will be a user-defined range for . This is implemented by e.g. JKQTPXYFunctionLineGraph. .

Implements JKQTPEvaluatedFunctionGraphBase.

◆ draw()

virtual void JKQTPYParsedFunctionLineGraph::draw ( JKQTPEnhancedPainter & painter )

overridevirtual

plots the graph to the plotter object specified as parent

Implements JKQTPPlotElement.

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

jkqtpparsedfunction.h

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ JKQTPYParsedFunctionLineGraph() [1/4]

◆ JKQTPYParsedFunctionLineGraph() [2/4]

◆ JKQTPYParsedFunctionLineGraph() [3/4]

◆ JKQTPYParsedFunctionLineGraph() [4/4]

◆ ~JKQTPYParsedFunctionLineGraph()

Member Function Documentation

◆ buildErrorFunctorSpec()

◆ buildPlotFunctorSpec()

◆ draw()