def __init__(self, parent=None):
Qwt.QwtPlot.__init__(self, parent)
self.canvas().setStyleSheet(
"border: 2px solid Black;"
"border-radius: 15px;"
"background-color: qlineargradient( x1: 0, y1: 0, x2: 0, y2: 1,"
"stop: 0 LemonChiffon, stop: 1 PaleGoldenrod );")
# attach curve
self.d_curve = Qwt.QwtPlotCurve("Scattered Points")
self.d_curve.setPen(QColor("Purple"))
# when using QwtPlotCurve.ImageBuffer simple dots can be
# rendered in parallel on multicore systems.
self.d_curve.setRenderThreadCount(
0) # 0: use QThread.idealThreadCount()
self.d_curve.attach(self)
self.setSymbol(None)
# panning with the left mouse button
Qwt.QwtPlotPanner(self.canvas())
# zoom in/out with the wheel
#magnifier = Qwt.QwtPlotMagnifier( self.canvas() ) FIXME
#magnifier.setMouseButton( Qt.NoButton )
# distanve measurement with the right mouse button
self.picker = DistancePicker(self.canvas())
self.picker.setMousePattern(Qwt.QwtPlotPicker.MouseSelect1,
Qt.RightButton)
self.picker.setRubberBandPen(QPen(Qt.blue))
import math
#import Qwt
from PyQt4 import Qwt
from PyQt4.QtCore import Qt, QSize
from PyQt4.QtGui import QBrush, QPen, QApplication
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)
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)