def __init__(self, *args):
QwtPlot.__init__(self, *args)
self.setTitle('ReallySimpleDemo.py')
self.insertLegend(QwtLegend(), QwtPlot.RightLegend)
self.setAxisTitle(QwtPlot.xBottom, 'x -->')
self.setAxisTitle(QwtPlot.yLeft, 'y -->')
self.enableAxis(self.xBottom)
# insert a few curves
cSin = QwtPlotCurve('y = sin(x)')
cSin.setPen(QPen(Qt.red))
cSin.attach(self)
cCos = QwtPlotCurve('y = cos(x)')
cCos.setPen(QPen(Qt.blue))
cCos.attach(self)
# make a Numeric array for the horizontal data
x = np.arange(0.0, 10.0, 0.1)
# initialize the data
cSin.setData(x, np.sin(x))
cCos.setData(x, np.cos(x))
# insert a horizontal marker at y = 0
mY = QwtPlotMarker()
mY.setLabel(QwtText('y = 0'))
mY.setLabelAlignment(Qt.AlignRight | Qt.AlignTop)
mY.setLineStyle(QwtPlotMarker.HLine)
mY.setYValue(0.0)
mY.attach(self)
# insert a vertical marker at x = 2 pi
mX = QwtPlotMarker()
mX.setLabel(QwtText('x = 2 pi'))
mX.setLabelAlignment(Qt.AlignRight | Qt.AlignTop)
mX.setLineStyle(QwtPlotMarker.VLine)
mX.setXValue(2*np.pi)
mX.attach(self)
# replot
self.replot()
def __init__(self, *args):
QwtPlot.__init__(self, *args)
self.setTitle('ReallySimpleDemo.py')
self.insertLegend(QwtLegend(), QwtPlot.RightLegend)
self.setAxisTitle(QwtPlot.xBottom, 'x -->')
self.setAxisTitle(QwtPlot.yLeft, 'y -->')
self.enableAxis(self.xBottom)
# insert a few curves
cSin = QwtPlotCurve('y = sin(x)')
cSin.setPen(QPen(Qt.red))
cSin.attach(self)
cCos = QwtPlotCurve('y = cos(x)')
cCos.setPen(QPen(Qt.blue))
cCos.attach(self)
# make a Numeric array for the horizontal data
x = np.arange(0.0, 10.0, 0.1)
# initialize the data
cSin.setData(x, np.sin(x))
cCos.setData(x, np.cos(x))
# insert a horizontal marker at y = 0
mY = QwtPlotMarker()
mY.setLabel(QwtText('y = 0'))
mY.setLabelAlignment(Qt.AlignRight | Qt.AlignTop)
mY.setLineStyle(QwtPlotMarker.HLine)
mY.setYValue(0.0)
mY.attach(self)
# insert a vertical marker at x = 2 pi
mX = QwtPlotMarker()
mX.setLabel(QwtText('x = 2 pi'))
mX.setLabelAlignment(Qt.AlignRight | Qt.AlignTop)
mX.setLineStyle(QwtPlotMarker.VLine)
mX.setXValue(2 * np.pi)
mX.attach(self)
# replot
self.replot()
def __init__(self, *args):
QwtPlot.__init__(self, *args)
self.setTitle('Frequency Response of a 2<sup>nd</sup>-order System')
self.setCanvasBackground(Qt.darkBlue)
# legend
legend = QwtLegend()
legend.setFrameStyle(QFrame.Box | QFrame.Sunken)
self.insertLegend(legend, QwtPlot.BottomLegend)
# grid
self.grid = QwtPlotGrid()
self.grid.enableXMin(True)
self.grid.attach(self)
# axes
self.enableAxis(QwtPlot.yRight)
self.setAxisTitle(QwtPlot.xBottom, '\u03c9/\u03c9<sub>0</sub>')
self.setAxisTitle(QwtPlot.yLeft, 'Amplitude [dB]')
self.setAxisTitle(QwtPlot.yRight, 'Phase [\u00b0]')
self.setAxisMaxMajor(QwtPlot.xBottom, 6)
self.setAxisMaxMinor(QwtPlot.xBottom, 10)
self.setAxisScaleEngine(QwtPlot.xBottom, QwtLogScaleEngine())
# curves
self.curve1 = QwtPlotCurve('Amplitude')
self.curve1.setRenderHint(QwtPlotItem.RenderAntialiased);
self.curve1.setPen(QPen(Qt.yellow))
self.curve1.setYAxis(QwtPlot.yLeft)
self.curve1.attach(self)
self.curve2 = QwtPlotCurve('Phase')
self.curve2.setRenderHint(QwtPlotItem.RenderAntialiased);
self.curve2.setPen(QPen(Qt.cyan))
self.curve2.setYAxis(QwtPlot.yRight)
self.curve2.attach(self)
# alias
fn = self.fontInfo().family()
# marker
self.dB3Marker = m = QwtPlotMarker()
m.setValue(0.0, 0.0)
m.setLineStyle(QwtPlotMarker.VLine)
m.setLabelAlignment(Qt.AlignRight | Qt.AlignBottom)
m.setLinePen(QPen(Qt.green, 2, Qt.DashDotLine))
text = QwtText('')
text.setColor(Qt.green)
text.setBackgroundBrush(Qt.red)
text.setFont(QFont(fn, 12, QFont.Bold))
m.setLabel(text)
m.attach(self)
self.peakMarker = m = QwtPlotMarker()
m.setLineStyle(QwtPlotMarker.HLine)
m.setLabelAlignment(Qt.AlignRight | Qt.AlignBottom)
m.setLinePen(QPen(Qt.red, 2, Qt.DashDotLine))
text = QwtText('')
text.setColor(Qt.red)
text.setBackgroundBrush(QBrush(self.canvasBackground()))
text.setFont(QFont(fn, 12, QFont.Bold))
m.setLabel(text)
m.setSymbol(QwtSymbol(QwtSymbol.Diamond,
QBrush(Qt.yellow),
QPen(Qt.green),
QSize(7,7)))
m.attach(self)
# text marker
m = QwtPlotMarker()
m.setValue(0.1, -20.0)
m.setLabelAlignment(Qt.AlignRight | Qt.AlignBottom)
text = QwtText(
'[1-(\u03c9/\u03c9<sub>0</sub>)<sup>2</sup>+2j\u03c9/Q]'
'<sup>-1</sup>'
)
text.setFont(QFont(fn, 12, QFont.Bold))
text.setColor(Qt.blue)
text.setBackgroundBrush(QBrush(Qt.yellow))
text.setBorderPen(QPen(Qt.red, 2))
m.setLabel(text)
m.attach(self)
self.setDamp(0.01)
def __init__(self, *args):
QwtPlot.__init__(self, *args)
# set plot title
self.setTitle('ImagePlot')
# set plot layout
self.plotLayout().setCanvasMargin(0)
self.plotLayout().setAlignCanvasToScales(True)
# set legend
legend = QwtLegend()
legend.setDefaultItemMode(QwtLegendData.Clickable)
self.insertLegend(legend, QwtPlot.RightLegend)
# set axis titles
self.setAxisTitle(QwtPlot.xBottom, 'time (s)')
self.setAxisTitle(QwtPlot.yLeft, 'frequency (Hz)')
colorMap = QwtLinearColorMap(Qt.blue, Qt.red)
interval = QwtInterval(-1, 1)
self.enableAxis(QwtPlot.yRight)
self.setAxisScale(QwtPlot.yRight, -1, 1)
self.axisWidget(QwtPlot.yRight).setColorBarEnabled(True)
self.axisWidget(QwtPlot.yRight).setColorMap(interval, colorMap)
# calculate 3 NumPy arrays
x = np.arange(-2 * np.pi, 2 * np.pi, 0.01)
y = np.pi * np.sin(x)
z = 4 * np.pi * np.cos(x) * np.cos(x) * np.sin(x)
# attach a curve
curve = QwtPlotCurve('y = pi*sin(x)')
curve.attach(self)
curve.setPen(QPen(Qt.green, 2))
curve.setData(x, y)
# attach another curve
curve = QwtPlotCurve('y = 4*pi*sin(x)*cos(x)**2')
curve.attach(self)
curve.setPen(QPen(Qt.black, 2))
curve.setData(x, z)
# attach a grid
grid = QwtPlotGrid()
grid.attach(self)
grid.setPen(QPen(Qt.black, 0, Qt.DotLine))
# attach a horizontal marker at y = 0
marker = QwtPlotMarker()
marker.attach(self)
marker.setValue(0.0, 0.0)
marker.setLineStyle(QwtPlotMarker.HLine)
marker.setLabelAlignment(Qt.AlignRight | Qt.AlignTop)
marker.setLabel(QwtText('y = 0'))
# attach a vertical marker at x = pi
marker = QwtPlotMarker()
marker.attach(self)
marker.setValue(np.pi, 0.0)
marker.setLineStyle(QwtPlotMarker.VLine)
marker.setLabelAlignment(Qt.AlignRight | Qt.AlignBottom)
marker.setLabel(QwtText('x = pi'))
# attach a plot image
plotImage = PlotImage('Image')
plotImage.attach(self)
plotImage.setData(square(512, -2 * np.pi, 2 * np.pi),
(-2 * np.pi, 2 * np.pi), (-2 * np.pi, 2 * np.pi))
legend.SIG_CLICKED.connect(self.toggleVisibility)
# replot
self.replot()
def __init__(self, *args):
QwtPlot.__init__(self, *args)
self.setTitle('Frequency Response of a 2<sup>nd</sup>-order System')
self.setCanvasBackground(Qt.darkBlue)
# legend
legend = QwtLegend()
legend.setFrameStyle(QFrame.Box | QFrame.Sunken)
self.insertLegend(legend, QwtPlot.BottomLegend)
# grid
self.grid = QwtPlotGrid()
self.grid.enableXMin(True)
self.grid.attach(self)
# axes
self.enableAxis(QwtPlot.yRight)
self.setAxisTitle(QwtPlot.xBottom, '\u03c9/\u03c9<sub>0</sub>')
self.setAxisTitle(QwtPlot.yLeft, 'Amplitude [dB]')
self.setAxisTitle(QwtPlot.yRight, 'Phase [\u00b0]')
self.setAxisMaxMajor(QwtPlot.xBottom, 6)
self.setAxisMaxMinor(QwtPlot.xBottom, 10)
self.setAxisScaleEngine(QwtPlot.xBottom, QwtLogScaleEngine())
# curves
self.curve1 = QwtPlotCurve('Amplitude')
self.curve1.setRenderHint(QwtPlotItem.RenderAntialiased)
self.curve1.setPen(QPen(Qt.yellow))
self.curve1.setYAxis(QwtPlot.yLeft)
self.curve1.attach(self)
self.curve2 = QwtPlotCurve('Phase')
self.curve2.setRenderHint(QwtPlotItem.RenderAntialiased)
self.curve2.setPen(QPen(Qt.cyan))
self.curve2.setYAxis(QwtPlot.yRight)
self.curve2.attach(self)
# alias
fn = self.fontInfo().family()
# marker
self.dB3Marker = m = QwtPlotMarker()
m.setValue(0.0, 0.0)
m.setLineStyle(QwtPlotMarker.VLine)
m.setLabelAlignment(Qt.AlignRight | Qt.AlignBottom)
m.setLinePen(QPen(Qt.green, 2, Qt.DashDotLine))
text = QwtText('')
text.setColor(Qt.green)
text.setBackgroundBrush(Qt.red)
text.setFont(QFont(fn, 12, QFont.Bold))
m.setLabel(text)
m.attach(self)
self.peakMarker = m = QwtPlotMarker()
m.setLineStyle(QwtPlotMarker.HLine)
m.setLabelAlignment(Qt.AlignRight | Qt.AlignBottom)
m.setLinePen(QPen(Qt.red, 2, Qt.DashDotLine))
text = QwtText('')
text.setColor(Qt.red)
text.setBackgroundBrush(QBrush(self.canvasBackground()))
text.setFont(QFont(fn, 12, QFont.Bold))
m.setLabel(text)
m.setSymbol(
QwtSymbol(QwtSymbol.Diamond, QBrush(Qt.yellow), QPen(Qt.green),
QSize(7, 7)))
m.attach(self)
# text marker
m = QwtPlotMarker()
m.setValue(0.1, -20.0)
m.setLabelAlignment(Qt.AlignRight | Qt.AlignBottom)
text = QwtText('[1-(\u03c9/\u03c9<sub>0</sub>)<sup>2</sup>+2j\u03c9/Q]'
'<sup>-1</sup>')
text.setFont(QFont(fn, 12, QFont.Bold))
text.setColor(Qt.blue)
text.setBackgroundBrush(QBrush(Qt.yellow))
text.setBorderPen(QPen(Qt.red, 2))
m.setLabel(text)
m.attach(self)
self.setDamp(0.01)
def __init__(self, *args):
QwtPlot.__init__(self, *args)
# set plot title
self.setTitle('ImagePlot')
# set plot layout
self.plotLayout().setCanvasMargin(0)
self.plotLayout().setAlignCanvasToScales(True)
# set legend
legend = QwtLegend()
legend.setDefaultItemMode(QwtLegendData.Clickable)
self.insertLegend(legend, QwtPlot.RightLegend)
# set axis titles
self.setAxisTitle(QwtPlot.xBottom, 'time (s)')
self.setAxisTitle(QwtPlot.yLeft, 'frequency (Hz)')
colorMap = QwtLinearColorMap(Qt.blue, Qt.red)
interval = QwtInterval(-1, 1)
self.enableAxis(QwtPlot.yRight)
self.setAxisScale(QwtPlot.yRight, -1, 1)
self.axisWidget(QwtPlot.yRight).setColorBarEnabled(True)
self.axisWidget(QwtPlot.yRight).setColorMap(interval, colorMap)
# calculate 3 NumPy arrays
x = np.arange(-2*np.pi, 2*np.pi, 0.01)
y = np.pi*np.sin(x)
z = 4*np.pi*np.cos(x)*np.cos(x)*np.sin(x)
# attach a curve
curve = QwtPlotCurve('y = pi*sin(x)')
curve.attach(self)
curve.setPen(QPen(Qt.green, 2))
curve.setData(x, y)
# attach another curve
curve = QwtPlotCurve('y = 4*pi*sin(x)*cos(x)**2')
curve.attach(self)
curve.setPen(QPen(Qt.black, 2))
curve.setData(x, z)
# attach a grid
grid = QwtPlotGrid()
grid.attach(self)
grid.setPen(QPen(Qt.black, 0, Qt.DotLine))
# attach a horizontal marker at y = 0
marker = QwtPlotMarker()
marker.attach(self)
marker.setValue(0.0, 0.0)
marker.setLineStyle(QwtPlotMarker.HLine)
marker.setLabelAlignment(Qt.AlignRight | Qt.AlignTop)
marker.setLabel(QwtText('y = 0'))
# attach a vertical marker at x = pi
marker = QwtPlotMarker()
marker.attach(self)
marker.setValue(np.pi, 0.0)
marker.setLineStyle(QwtPlotMarker.VLine)
marker.setLabelAlignment(Qt.AlignRight | Qt.AlignBottom)
marker.setLabel(QwtText('x = pi'))
# attach a plot image
plotImage = PlotImage('Image')
plotImage.attach(self)
plotImage.setData(square(512, -2*np.pi, 2*np.pi),
(-2*np.pi, 2*np.pi), (-2*np.pi, 2*np.pi))
legend.SIG_CLICKED.connect(self.toggleVisibility)
# replot
self.replot()
