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<title>Qwt User's Guide: Class Hierarchy</title>
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<div id="projectname">Qwt User's Guide <span id="projectnumber">6.0.1</span></div>
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<li><a href="annotated.html"><span>Class List</span></a></li>
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<li class="current"><a href="inherits.html"><span>Class Hierarchy</span></a></li>
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<h1>Class Hierarchy</h1> </div>
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<p><a href="hierarchy.html">Go to the textual class hierarchy</a></p>
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<tr><td><img src="inherit_graph_0.png" border="0" alt="" usemap="#_qwt_abstract_scale_draw"/>
<map name="_qwt_abstract_scale_draw" id="_qwt_abstract_scale_draw">
<area shape="rect" id="node1" href="class_qwt_abstract_scale_draw.html" title="A abstract base class for drawing scales." alt="" coords="7,32,161,61"/><area shape="rect" id="node3" href="class_qwt_round_scale_draw.html" title="A class for drawing round scales." alt="" coords="211,5,355,35"/><area shape="rect" id="node7" href="class_qwt_scale_draw.html" title="A class for drawing scales." alt="" coords="229,59,336,88"/><area shape="rect" id="node5" href="class_qwt_dial_scale_draw.html" title="A special scale draw made for QwtDial." alt="" coords="404,5,532,35"/></map>
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<tr><td><img src="inherit_graph_1.png" border="0" alt="" usemap="#_qwt_arrow_button"/>
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<area shape="rect" id="node1" href="class_qwt_arrow_button.html" title="Arrow Button." alt="" coords="7,5,121,35"/></map>
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<tr><td><img src="inherit_graph_2.png" border="0" alt="" usemap="#_qwt_clipper"/>
<map name="_qwt_clipper" id="_qwt_clipper">
<area shape="rect" id="node1" href="class_qwt_clipper.html" title="Some clipping algos." alt="" coords="5,5,91,35"/></map>
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<tr><td><img src="inherit_graph_3.png" border="0" alt="" usemap="#_qwt_color_map"/>
<map name="_qwt_color_map" id="_qwt_color_map">
<area shape="rect" id="node1" href="class_qwt_color_map.html" title="QwtColorMap is used to map values into colors." alt="" coords="7,32,105,61"/><area shape="rect" id="node3" href="class_qwt_alpha_color_map.html" title="QwtAlphaColorMap variies the alpha value of a color." alt="" coords="156,5,289,35"/><area shape="rect" id="node5" href="class_qwt_linear_color_map.html" title="QwtLinearColorMap builds a color map from color stops." alt="" coords="156,59,289,88"/></map>
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<tr><td><img src="inherit_graph_4.png" border="0" alt="" usemap="#_qwt_column_rect"/>
<map name="_qwt_column_rect" id="_qwt_column_rect">
<area shape="rect" id="node1" href="class_qwt_column_rect.html" title="Directed rectangle representing bounding rectangle und orientation of a column." alt="" coords="7,5,121,35"/></map>
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<tr><td><img src="inherit_graph_5.png" border="0" alt="" usemap="#_qwt_column_symbol"/>
<map name="_qwt_column_symbol" id="_qwt_column_symbol">
<area shape="rect" id="node1" href="class_qwt_column_symbol.html" title="A drawing primitive for columns." alt="" coords="5,5,139,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_6.png" border="0" alt="" usemap="#_qwt_compass_rose"/>
<map name="_qwt_compass_rose" id="_qwt_compass_rose">
<area shape="rect" id="node1" href="class_qwt_compass_rose.html" title="Abstract base class for a compass rose." alt="" coords="5,5,136,35"/><area shape="rect" id="node3" href="class_qwt_simple_compass_rose.html" title="A simple rose for QwtCompass." alt="" coords="184,5,355,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_7.png" border="0" alt="" usemap="#_qwt_curve_fitter"/>
<map name="_qwt_curve_fitter" id="_qwt_curve_fitter">
<area shape="rect" id="node1" href="class_qwt_curve_fitter.html" title="Abstract base class for a curve fitter." alt="" coords="5,32,112,61"/><area shape="rect" id="node3" href="class_qwt_spline_curve_fitter.html" title="A curve fitter using cubic splines." alt="" coords="169,5,311,35"/><area shape="rect" id="node5" href="class_qwt_weeding_curve_fitter.html" title="A curve fitter implementing Douglas and Peucker algorithm." alt="" coords="161,59,319,88"/></map>
</td></tr>
<tr><td><img src="inherit_graph_8.png" border="0" alt="" usemap="#_qwt_dial_needle"/>
<map name="_qwt_dial_needle" id="_qwt_dial_needle">
<area shape="rect" id="node1" href="class_qwt_dial_needle.html" title="Base class for needles that can be used in a QwtDial." alt="" coords="5,59,112,88"/><area shape="rect" id="node3" href="class_qwt_compass_magnet_needle.html" title="A magnet needle for compass widgets." alt="" coords="161,5,343,35"/><area shape="rect" id="node5" href="class_qwt_compass_wind_arrow.html" title="An indicator for the wind direction." alt="" coords="171,59,333,88"/><area shape="rect" id="node7" href="class_qwt_dial_simple_needle.html" title="A needle for dial widgets." alt="" coords="179,112,325,141"/></map>
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<tr><td><img src="inherit_graph_9.png" border="0" alt="" usemap="#_qwt_double_range"/>
<map name="_qwt_double_range" id="_qwt_double_range">
<area shape="rect" id="node1" href="class_qwt_abstract_scale.html" title="An abstract base class for classes containing a scale." alt="" coords="177,59,303,88"/><area shape="rect" id="node3" href="class_qwt_knob.html" title="The Knob Widget." alt="" coords="359,112,433,141"/><area shape="rect" id="node5" href="class_qwt_slider.html" title="The Slider Widget." alt="" coords="357,59,435,88"/><area shape="rect" id="node7" href="class_qwt_thermo.html" title="The Thermometer Widget." alt="" coords="352,5,440,35"/><area shape="rect" id="node8" href="class_qwt_double_range.html" title="A class which controls a value within an interval." alt="" coords="5,139,128,168"/><area shape="rect" id="node10" href="class_qwt_abstract_slider.html" title="An abstract base class for slider widgets." alt="" coords="177,165,303,195"/><area shape="rect" id="node22" href="class_qwt_counter.html" title="The Counter Widget." alt="" coords="195,112,285,141"/><area shape="rect" id="node12" href="class_qwt_dial.html" title="QwtDial class provides a rounded range control." alt="" coords="363,219,429,248"/><area shape="rect" id="node20" href="class_qwt_wheel.html" title="The Wheel Widget." alt="" coords="355,165,437,195"/><area shape="rect" id="node14" href="class_qwt_analog_clock.html" title="An analog clock." alt="" coords="489,192,607,221"/><area shape="rect" id="node16" href="class_qwt_compass.html" title="A Compass Widget." alt="" coords="499,245,597,275"/></map>
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<tr><td><img src="inherit_graph_10.png" border="0" alt="" usemap="#_qwt_dyn_grid_layout"/>
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<area shape="rect" id="node1" href="class_qwt_dyn_grid_layout.html" title="The QwtDynGridLayout class lays out widgets in a grid, adjusting the number of columns and rows to th..." alt="" coords="5,5,136,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_11.png" border="0" alt="" usemap="#_qwt_event_pattern"/>
<map name="_qwt_event_pattern" id="_qwt_event_pattern">
<area shape="rect" id="node1" href="class_qwt_event_pattern.html" title="A collection of event patterns." alt="" coords="7,5,124,35"/><area shape="rect" id="node3" href="class_qwt_picker.html" title="QwtPicker provides selections on a widget." alt="" coords="173,5,256,35"/><area shape="rect" id="node5" href="class_qwt_plot_picker.html" title="QwtPlotPicker provides selections on a plot canvas." alt="" coords="305,5,409,35"/><area shape="rect" id="node7" href="class_qwt_plot_zoomer.html" title="QwtPlotZoomer provides stacked zooming for a plot widget." alt="" coords="460,5,569,35"/></map>
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<tr><td><img src="inherit_graph_12.png" border="0" alt="" usemap="#_qwt_event_pattern_1_1_key_pattern"/>
<map name="_qwt_event_pattern_1_1_key_pattern" id="_qwt_event_pattern_1_1_key_pattern">
<area shape="rect" id="node1" href="class_qwt_event_pattern_1_1_key_pattern.html" title="A pattern for key events." alt="" coords="5,5,197,35"/></map>
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<tr><td><img src="inherit_graph_13.png" border="0" alt="" usemap="#_qwt_event_pattern_1_1_mouse_pattern"/>
<map name="_qwt_event_pattern_1_1_mouse_pattern" id="_qwt_event_pattern_1_1_mouse_pattern">
<area shape="rect" id="node1" href="class_qwt_event_pattern_1_1_mouse_pattern.html" title="A pattern for mouse events." alt="" coords="5,5,213,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_14.png" border="0" alt="" usemap="#_qwt_interval"/>
<map name="_qwt_interval" id="_qwt_interval">
<area shape="rect" id="node1" href="class_qwt_interval.html" title="A class representing an interval." alt="" coords="5,5,91,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_15.png" border="0" alt="" usemap="#_qwt_interval_sample"/>
<map name="_qwt_interval_sample" id="_qwt_interval_sample">
<area shape="rect" id="node1" href="class_qwt_interval_sample.html" title="A sample of the types (x1-x2, y) or (x, y1-y2)" alt="" coords="7,5,135,35"/></map>
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<tr><td><img src="inherit_graph_16.png" border="0" alt="" usemap="#_qwt_interval_symbol"/>
<map name="_qwt_interval_symbol" id="_qwt_interval_symbol">
<area shape="rect" id="node1" href="class_qwt_interval_symbol.html" title="A drawing primitive for displaying an interval like an error bar." alt="" coords="7,5,135,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_17.png" border="0" alt="" usemap="#_qwt_legend"/>
<map name="_qwt_legend" id="_qwt_legend">
<area shape="rect" id="node1" href="class_qwt_legend.html" title="The legend widget." alt="" coords="7,5,92,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_18.png" border="0" alt="" usemap="#_qwt_legend_item_manager"/>
<map name="_qwt_legend_item_manager" id="_qwt_legend_item_manager">
<area shape="rect" id="node1" href="class_qwt_legend_item_manager.html" title="Abstract API to bind plot items to the legend." alt="" coords="5,219,168,248"/><area shape="rect" id="node3" href="class_qwt_plot_item.html" title="Base class for items on the plot canvas." alt="" coords="216,219,309,248"/><area shape="rect" id="node5" href="class_qwt_plot_abstract_series_item.html" title="Base class for plot items representing a series of samples." alt="" coords="357,85,536,115"/><area shape="rect" id="node23" href="class_qwt_plot_grid.html" title="A class which draws a coordinate grid." alt="" coords="401,139,492,168"/><area shape="rect" id="node25" href="class_qwt_plot_marker.html" title="A class for drawing markers." alt="" coords="393,192,500,221"/><area shape="rect" id="node27" href="class_qwt_plot_raster_item.html" title="A class, which displays raster data." alt="" coords="381,245,512,275"/><area shape="rect" id="node31" href="class_qwt_plot_scale_item.html" title="A class which draws a scale inside the plot canvas." alt="" coords="384,299,509,328"/><area shape="rect" id="node33" href="class_qwt_plot_svg_item.html" title="A plot item, which displays data in Scalable Vector Graphics (SVG) format." alt="" coords="389,352,504,381"/><area shape="rect" id="node7" href="class_qwt_plot_series_item.html" title="Class template for plot items representing a series of samples." alt="" coords="635,5,795,35"/><area shape="rect" id="node9" href="class_qwt_plot_series_item.html" title="QwtPlotSeriesItem\< QPointF \>" alt="" coords="613,59,816,88"/><area shape="rect" id="node13" href="class_qwt_plot_series_item.html" title="QwtPlotSeriesItem\< QwtIntervalSample \>" alt="" coords="584,112,845,141"/><area shape="rect" id="node19" href="class_qwt_plot_series_item.html" title="QwtPlotSeriesItem\< QwtPoint3D \>" alt="" coords="604,165,825,195"/><area shape="rect" id="node11" href="class_qwt_plot_curve.html" title="A plot item, that represents a series of points." alt="" coords="917,32,1016,61"/><area shape="rect" id="node15" href="class_qwt_plot_histogram.html" title="QwtPlotHistogram represents a series of samples, where an interval is associated with a value (  )..." alt="" coords="904,85,1029,115"/><area shape="rect" id="node17" href="class_qwt_plot_interval_curve.html" title="QwtPlotIntervalCurve represents a series of samples, where each value is associated with an interval ..." alt="" coords="897,139,1036,168"/><area shape="rect" id="node21" href="class_qwt_plot_spectro_curve.html" title="Curve that displays 3D points as dots, where the z coordinate is mapped to a color." alt="" coords="895,192,1039,221"/><area shape="rect" id="node29" href="class_qwt_plot_spectrogram.html" title="A plot item, which displays a spectrogram." alt="" coords="644,245,785,275"/></map>
</td></tr>
<tr><td><img src="inherit_graph_19.png" border="0" alt="" usemap="#_qwt_magnifier"/>
<map name="_qwt_magnifier" id="_qwt_magnifier">
<area shape="rect" id="node1" href="class_qwt_magnifier.html" title="QwtMagnifier provides zooming, by magnifying in steps." alt="" coords="7,5,103,35"/><area shape="rect" id="node3" href="class_qwt_plot_magnifier.html" title="QwtPlotMagnifier provides zooming, by magnifying in steps." alt="" coords="152,5,272,35"/></map>
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<tr><td><img src="inherit_graph_20.png" border="0" alt="" usemap="#_qwt_math_m_l_document"/>
<map name="_qwt_math_m_l_document" id="_qwt_math_m_l_document">
<area shape="rect" id="node1" href="class_qwt_math_m_l_document.html" title="The QwtMathMLDocument class renders mathematical formulas written in MathML 2.0." alt="" coords="7,5,156,35"/></map>
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<tr><td><img src="inherit_graph_21.png" border="0" alt="" usemap="#_qwt_null_paint_device"/>
<map name="_qwt_null_paint_device" id="_qwt_null_paint_device">
<area shape="rect" id="node1" href="class_qwt_null_paint_device.html" title="A null paint device doing nothing." alt="" coords="7,5,140,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_22.png" border="0" alt="" usemap="#_qwt_painter"/>
<map name="_qwt_painter" id="_qwt_painter">
<area shape="rect" id="node1" href="class_qwt_painter.html" title="A collection of QPainter workarounds." alt="" coords="7,5,92,35"/></map>
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<tr><td><img src="inherit_graph_23.png" border="0" alt="" usemap="#_qwt_panner"/>
<map name="_qwt_panner" id="_qwt_panner">
<area shape="rect" id="node1" href="class_qwt_panner.html" title="QwtPanner provides panning of a widget." alt="" coords="7,5,92,35"/><area shape="rect" id="node3" href="class_qwt_plot_panner.html" title="QwtPlotPanner provides panning of a plot canvas." alt="" coords="141,5,251,35"/></map>
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<tr><td><img src="inherit_graph_24.png" border="0" alt="" usemap="#_qwt_picker_machine"/>
<map name="_qwt_picker_machine" id="_qwt_picker_machine">
<area shape="rect" id="node1" href="class_qwt_picker_machine.html" title="A state machine for QwtPicker selections." alt="" coords="5,139,136,168"/><area shape="rect" id="node3" href="class_qwt_picker_click_point_machine.html" title="A state machine for point selections." alt="" coords="185,5,375,35"/><area shape="rect" id="node5" href="class_qwt_picker_click_rect_machine.html" title="A state machine for rectangle selections." alt="" coords="187,59,373,88"/><area shape="rect" id="node7" href="class_qwt_picker_drag_point_machine.html" title="A state machine for point selections." alt="" coords="187,112,373,141"/><area shape="rect" id="node9" href="class_qwt_picker_drag_rect_machine.html" title="A state machine for rectangle selections." alt="" coords="188,165,372,195"/><area shape="rect" id="node11" href="class_qwt_picker_polygon_machine.html" title="A state machine for polygon selections." alt="" coords="191,219,369,248"/><area shape="rect" id="node13" href="class_qwt_picker_tracker_machine.html" title="A state machine for indicating mouse movements." alt="" coords="193,272,367,301"/></map>
</td></tr>
<tr><td><img src="inherit_graph_25.png" border="0" alt="" usemap="#_qwt_plot_canvas"/>
<map name="_qwt_plot_canvas" id="_qwt_plot_canvas">
<area shape="rect" id="node1" href="class_qwt_plot_canvas.html" title="Canvas of a QwtPlot." alt="" coords="7,5,116,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_26.png" border="0" alt="" usemap="#_qwt_plot_dict"/>
<map name="_qwt_plot_dict" id="_qwt_plot_dict">
<area shape="rect" id="node1" href="class_qwt_plot_dict.html" title="A dictionary for plot items." alt="" coords="5,5,96,35"/><area shape="rect" id="node3" href="class_qwt_plot.html" title="A 2-D plotting widget." alt="" coords="145,5,212,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_27.png" border="0" alt="" usemap="#_qwt_plot_direct_painter"/>
<map name="_qwt_plot_direct_painter" id="_qwt_plot_direct_painter">
<area shape="rect" id="node1" href="class_qwt_plot_direct_painter.html" title="Painter object trying to paint incrementally." alt="" coords="7,5,148,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_28.png" border="0" alt="" usemap="#_qwt_plot_layout"/>
<map name="_qwt_plot_layout" id="_qwt_plot_layout">
<area shape="rect" id="node1" href="class_qwt_plot_layout.html" title="Layout engine for QwtPlot." alt="" coords="5,5,112,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_29.png" border="0" alt="" usemap="#_qwt_plot_renderer"/>
<map name="_qwt_plot_renderer" id="_qwt_plot_renderer">
<area shape="rect" id="node1" href="class_qwt_plot_renderer.html" title="Renderer for exporting a plot to a document, a printer or anything else, that is supported by QPainte..." alt="" coords="5,5,125,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_30.png" border="0" alt="" usemap="#_qwt_plot_rescaler"/>
<map name="_qwt_plot_rescaler" id="_qwt_plot_rescaler">
<area shape="rect" id="node1" href="class_qwt_plot_rescaler.html" title="QwtPlotRescaler takes care of fixed aspect ratios for plot scales." alt="" coords="7,5,124,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_31.png" border="0" alt="" usemap="#_qwt_point3_d"/>
<map name="_qwt_point3_d" id="_qwt_point3_d">
<area shape="rect" id="node1" href="class_qwt_point3_d.html" title="QwtPoint3D class defines a 3D point in double coordinates." alt="" coords="5,5,96,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_32.png" border="0" alt="" usemap="#_qwt_point_polar"/>
<map name="_qwt_point_polar" id="_qwt_point_polar">
<area shape="rect" id="node1" href="class_qwt_point_polar.html" title="A point in polar coordinates." alt="" coords="7,5,111,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_33.png" border="0" alt="" usemap="#_qwt_raster_data"/>
<map name="_qwt_raster_data" id="_qwt_raster_data">
<area shape="rect" id="node1" href="class_qwt_raster_data.html" title="QwtRasterData defines an interface to any type of raster data." alt="" coords="7,5,116,35"/><area shape="rect" id="node3" href="class_qwt_matrix_raster_data.html" title="A class representing a matrix of values as raster data." alt="" coords="165,5,312,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_34.png" border="0" alt="" usemap="#_qwt_sampling_thread"/>
<map name="_qwt_sampling_thread" id="_qwt_sampling_thread">
<area shape="rect" id="node1" href="class_qwt_sampling_thread.html" title="A thread collecting samples at regular intervals." alt="" coords="5,5,144,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_35.png" border="0" alt="" usemap="#_qwt_scale_arithmetic"/>
<map name="_qwt_scale_arithmetic" id="_qwt_scale_arithmetic">
<area shape="rect" id="node1" href="class_qwt_scale_arithmetic.html" title="Arithmetic including a tolerance." alt="" coords="7,5,143,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_36.png" border="0" alt="" usemap="#_qwt_scale_div"/>
<map name="_qwt_scale_div" id="_qwt_scale_div">
<area shape="rect" id="node1" href="class_qwt_scale_div.html" title="A class representing a scale division." alt="" coords="7,5,100,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_37.png" border="0" alt="" usemap="#_qwt_scale_engine"/>
<map name="_qwt_scale_engine" id="_qwt_scale_engine">
<area shape="rect" id="node1" href="class_qwt_scale_engine.html" title="Base class for scale engines." alt="" coords="7,32,124,61"/><area shape="rect" id="node3" href="class_qwt_linear_scale_engine.html" title="A scale engine for linear scales." alt="" coords="175,5,327,35"/><area shape="rect" id="node5" href="class_qwt_log10_scale_engine.html" title="A scale engine for logarithmic (base 10) scales." alt="" coords="175,59,327,88"/></map>
</td></tr>
<tr><td><img src="inherit_graph_38.png" border="0" alt="" usemap="#_qwt_scale_map"/>
<map name="_qwt_scale_map" id="_qwt_scale_map">
<area shape="rect" id="node1" href="class_qwt_scale_map.html" title="A scale map." alt="" coords="7,5,108,35"/></map>
</td></tr>
<tr><td><img src="inherit_graph_39.png" border="0" alt="" usemap="#_qwt_scale_transformation"/>
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