def __init__(self):
Curve.__init__(self)
self.setPen( QColor( 150, 150, 200 ), 2 )
self.setStyle( Qwt.QwtPlotCurve.Lines )
curveFitter = Qwt.QwtSplineCurveFitter()
curveFitter.setSplineSize( 150 )
self.setCurveFitter( curveFitter )
self.setCurveAttribute( Qwt.QwtPlotCurve.Fitted, True )
symbol = Qwt.QwtSymbol( Qwt.QwtSymbol.XCross )
symbol.setPen( Qt.yellow )
symbol.setSize( 7 )
self.setSymbol( symbol )
# somewhere to the left
self.transform = QTransform()
self.transform.scale( 1.5, 1.0 );
self.transform.translate( 1.5, 3.0 );
self.setTransformation( self.transform )
a = QApplication(sys.argv)
plot = Qwt.QwtPlot()
plot.setTitle("Plot Demo")
plot.setCanvasBackground(Qt.white)
plot.insertLegend(Qwt.QwtLegend())
grid = Qwt.QwtPlotGrid()
grid.attach(plot)
curve = Qwt.QwtPlotCurve()
curve.setTitle("Some Points")
curve.setPen(Qt.blue, 4)
curve.setRenderHint(Qwt.QwtPlotItem.RenderAntialiased, True)
symbol = Qwt.QwtSymbol(Qwt.QwtSymbol.Ellipse, QBrush(Qt.yellow),
QPen(Qt.red, 2), QSize(8, 8))
curve.setSymbol(symbol)
#x=np.arange(0,10,0.1)
x = []
y = []
for i in range(101):
x.append(0.1 * i)
y.append(math.sin(0.1 * i))
#y=np.sin(x)
curve.setSamples(x, y)
curve.attach(plot)
plot.resize(600, 400)
plot.replot()
plot.show()
def __init__(self, parent=None):
Qwt.QwtPlot.__init__(self, parent)
self.setAutoReplot(False)
self.setTitle("Frequency Response of a Second-Order System")
canvas = Qwt.QwtPlotCanvas()
canvas.setBorderRadius(10)
self.setCanvas(canvas)
self.setCanvasBackground(QColor("MidnightBlue"))
# legend
legend = Qwt.QwtLegend()
self.insertLegend(legend, Qwt.QwtPlot.BottomLegend)
# grid
grid = Qwt.QwtPlotGrid()
grid.enableXMin(True)
grid.setMajorPen(Qt.white, 0, Qt.DotLine)
grid.setMinorPen(Qt.gray, 0, Qt.DotLine)
grid.attach(self)
# axes
self.enableAxis(Qwt.QwtPlot.yRight)
self.setAxisTitle(Qwt.QwtPlot.xBottom, "Normalized Frequency")
self.setAxisTitle(Qwt.QwtPlot.yLeft, "Amplitude [dB]")
self.setAxisTitle(Qwt.QwtPlot.yRight, "Phase [deg]")
self.setAxisMaxMajor(Qwt.QwtPlot.xBottom, 6)
self.setAxisMaxMinor(Qwt.QwtPlot.xBottom, 9)
self.setAxisScaleEngine(Qwt.QwtPlot.xBottom, Qwt.QwtLogScaleEngine())
# curves
self.d_curve1 = Qwt.QwtPlotCurve("Amplitude")
self.d_curve1.setRenderHint(Qwt.QwtPlotItem.RenderAntialiased)
self.d_curve1.setPen(Qt.yellow)
self.d_curve1.setLegendAttribute(Qwt.QwtPlotCurve.LegendShowLine)
self.d_curve1.setYAxis(Qwt.QwtPlot.yLeft)
self.d_curve1.attach(self)
self.d_curve2 = Qwt.QwtPlotCurve("Phase")
self.d_curve2.setRenderHint(Qwt.QwtPlotItem.RenderAntialiased)
self.d_curve2.setPen(Qt.cyan)
self.d_curve2.setLegendAttribute(Qwt.QwtPlotCurve.LegendShowLine)
self.d_curve2.setYAxis(Qwt.QwtPlot.yRight)
self.d_curve2.attach(self)
# marker
self.d_marker1 = Qwt.QwtPlotMarker()
self.d_marker1.setValue(0.0, 0.0)
self.d_marker1.setLineStyle(Qwt.QwtPlotMarker.VLine)
self.d_marker1.setLabelAlignment(Qt.AlignRight | Qt.AlignBottom)
self.d_marker1.setLinePen(Qt.green, 0, Qt.DashDotLine)
self.d_marker1.attach(self)
self.d_marker2 = Qwt.QwtPlotMarker()
self.d_marker2.setLineStyle(Qwt.QwtPlotMarker.HLine)
self.d_marker2.setLabelAlignment(Qt.AlignRight | Qt.AlignBottom)
self.d_marker2.setLinePen(QColor(200, 150, 0), 0, Qt.DashDotLine)
self.d_marker2.setSymbol(
Qwt.QwtSymbol(Qwt.QwtSymbol.Diamond, QColor(Qt.yellow),
QColor(Qt.green), QSize(8, 8)))
self.d_marker2.attach(self)
self.setDamp(0)
self.setAutoReplot(True)
def __init__(self):
Curve.__init__(self)
self.setStyle( Qwt.QwtPlotCurve.Sticks );
self.setPen( QColor( 200, 150, 50 ) );
self.setSymbol( Qwt.QwtSymbol( Qwt.QwtSymbol.Ellipse,QColor( Qt.gray ), QColor( Qt.yellow ), QSize( 5, 5 ) ) )