matplotlib-users Mailing List for matplotlib

On 2014年06月21日, 3:39 PM, 不坏阿峰 wrote:
> is there someone can help me ?
Posting a *simple*, self-contained example as a starting point would 
make it more likely that someone would understand your question. Leave 
out everything that is irrelevant--I suspect all the gui and threading 
code is in that category.
Also, although it is not directly related to your question, please note 
that you are using a horrible mixture of backend invocations, and even 
if it works now, it will do you no good in the long run.
See the embedding examples: no matplotlib.use, no pylab, one and only 
one gui toolkit.
I also suspect the answer to your question is at least partly in one of 
the examples of plotting with dates; dates and times are handled 
together. Here is one such example:
http://matplotlib.org/examples/pylab_examples/date_demo1.html
Eric
> many thanks
>
>
> 2014年06月19日 19:36 GMT+07:00 不坏阿峰 <onl...@gm...
> <mailto:onl...@gm...>>:
>
> Dear all
>
> could some expert can help me.
> I have modify from one demo. but i do not how to change the x_lable
> to time like H:M:S, and can move it. i have try some way, but failed.
>
> hope some expert can do me a favor.
> thanks a lot
>
> ######################
> # coding=utf-8
> import os
> import pprint
> import random, time
> import sys
> from PyQt4 import QtGui, QtCore
> from threading import *
> import time
> import datetime
>
> import matplotlib
> matplotlib.use('WXAgg')
> from matplotlib.figure import Figure
> from matplotlib.backends.backend_qt4agg import \
> FigureCanvasQTAgg as FigCanvas, \
> NavigationToolbar2QT as NavigationToolbar
> import numpy as np
> import pylab
> class DataGen(object):
> """ A silly class that generates pseudo-random data for
> display in the plot.
> """
> def __init__(self, init=50):
> self.data = self.init = init
> def next(self):
> self._recalc_data()
> return self.data
> def _recalc_data(self):
> delta = random.uniform(-0.5, 0.5)
> r = random.random()
> if r > 0.9:
> self.data += delta * 15
> elif r > 0.8:
> # attraction to the initial value
> delta += (0.5 if self.init > self.data else -0.5)
> self.data += delta
> else:
> self.data += delta
>
> class myThing():
> class myThread(Thread):
> def __init__(self):
> Thread.__init__(self)
> self.running = True
> self.vec = [0]
> self.dg = DataGen()
>
> print "Initializing myThread..."
>
> def run(self):
> print "Running myThread..."
> while self.running:
> time.sleep(1)
> self.vec.append(self.dg.next())
> print "Splat"
> def getVec(self):
> return self.vec
> def stop(self):
> self.running = False
> def __init__(self):
> self.theThread = self.myThread()
> self.threadRunning = True
> print "initializing myThing..."
> self.theThread.start()
> def __del__(self):
> self.theThread.stop()
> def getVec(self):
> #print self.theThread.vec[:]
> return self.theThread.vec[:]
> class ApplicationWindow(QtGui.QMainWindow):
> """ The main window of the application
> """
> def __init__(self):
> QtGui.QMainWindow.__init__(self)
> self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
> self.setWindowTitle('Demo: dynamic matplotlib graph')
> self.thing1 = myThing()
> self.thing2 = myThing()
> self.starttime = int(time.time())
>
>
> self.create_menu()
> #self.create_status_bar()
> self.create_main_panel()
> self.redraw_timer = QtCore.QTimer(self)
> QtCore.QObject.connect(self.redraw_timer,
> QtCore.SIGNAL("timeout()"), self.on_redraw_timer)
> self.redraw_timer.start(4000)
> def create_menu(self):
> menu_file = QtGui.QMenu("&File", self)
> #menu_file.addAction(u'&Save plot', self.on_save_plot,
> # QtCore.Qt.CTRL + QtCore.Qt.Key_S)
> menu_file.addSeparator()
> menu_file.addAction(u'E&xit', self.on_exit,
> QtCore.Qt.CTRL + QtCore.Qt.Key_X)
> self.menuBar().addMenu(menu_file)
> def create_main_panel(self):
> self.panel = QtGui.QFrame(self)
> self.setCentralWidget(self.panel)
> self.init_plot()
> self.canvas = FigCanvas(self.fig)
> self.canvas.setMinimumHeight(150)
> #self.toolbar = NavigationToolbar(self.canvas, None)
> self.vbox = QtGui.QVBoxLayout()
> self.vbox.addWidget(self.canvas)
>
> self.panel.setLayout(self.vbox)
> #self.vbox.Fit(self)
> self.unit = 20
> width, height = self.geometry().width(),
> self.geometry().height()
> self.show()
> def init_plot(self):
> self.dpi = 100
> self.fig = Figure((5.0, 3.0), dpi=self.dpi)
> self.axes = self.fig.add_subplot(111, navigate=False)
> self.axes.set_axis_bgcolor('black')
>
> self.axes.set_title('Very important random data', size=10)
> self.axes.set_xlabel('Time flies like an arrow',size=10)
> self.axes.set_ylabel('Random is just random',size=10)
> pylab.setp(self.axes.get_xticklabels(), fontsize=8)
> pylab.setp(self.axes.get_yticklabels(), fontsize=8)
> self.plot_data = self.axes.plot(
> self.thing1.getVec(),
> linewidth=0.5,
> color=(1, 1, 0),
> #marker='o',
> label="set1",
> )[0]
> print self.thing1.getVec(), "<<>>"
> self.plot_data2 = self.axes.plot(
> self.thing2.getVec(),
> linewidth=1,
> dashes=[.2, .4],
> color=(0, 1, 1),
> label="set2",
> )[0]
>
>
> def draw_plot(self):
> """ Redraws the plot
> """
> self.data = self.thing1.getVec()
> self.data2 = self.thing2.getVec()
> def do_cal(urdata):
> newdata = []
> for x in range(len(urdata)):
> urtime = x + self.starttime
> newdata.append(urtime)
> return newdata
>
> xmax = len(self.data) if len(self.data) > 50 else 50
>
> xmin = xmax - 50
>
> min1 = min(self.data)
> min2 = min(self.data2)
> theMin = min(min1, min2)
>
> ymin = round(theMin, 0) - 1
>
> max1 = max(self.data)
> max2 = max(self.data2)
> theMax = max(max1, max2)
>
> ymax = round(theMax, 0) + 1
>
> self.axes.set_xbound(lower=xmin, upper=xmax)
> self.axes.set_ybound(lower=ymin, upper=ymax)
>
> self.axes.grid(True, color='gray')
> pylab.setp(self.axes.get_xticklabels(),
> visible=True)
>
> self.plot_data.set_xdata(np.arange(len(self.data)))
> self.plot_data.set_ydata(np.array(self.data))
> self.plot_data2.set_xdata(np.arange(len(self.data2)))
> #self.plot_data2.set_xdata(np.array(newdata2))
> self.plot_data2.set_ydata(np.array(self.data2))
>
> self.canvas.draw()
> def on_redraw_timer(self):
> self.draw_plot()
> def on_exit(self):
> self.close()
> def closeEvent(self, event):
> for thing in (self.thing1, self.thing2):
> thing.theThread.stop()
> thing.theThread.join()
> if __name__ == '__main__':
> app = QtGui.QApplication(sys.argv)
> aw = ApplicationWindow()
> aw.show()
> sys.exit(app.exec_())
>
> #################################
> 内嵌图片 1
>
>
>
>
> ------------------------------------------------------------------------------
> HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions
> Find What Matters Most in Your Big Data with HPCC Systems
> Open Source. Fast. Scalable. Simple. Ideal for Dirty Data.
> Leverages Graph Analysis for Fast Processing & Easy Data Exploration
> http://p.sf.net/sfu/hpccsystems
>
>
>
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

is there someone can help me ?
many thanks
2014年06月19日 19:36 GMT+07:00 不坏阿峰 <onl...@gm...>:
> Dear all
>
> could some expert can help me.
> I have modify from one demo. but i do not how to change the x_lable to
> time like H:M:S, and can move it. i have try some way, but failed.
>
> hope some expert can do me a favor.
> thanks a lot
>
> ######################
> # coding=utf-8
> import os
> import pprint
> import random, time
> import sys
> from PyQt4 import QtGui, QtCore
>
> from threading import *
> import time
> import datetime
>
> import matplotlib
> matplotlib.use('WXAgg')
> from matplotlib.figure import Figure
> from matplotlib.backends.backend_qt4agg import \
> FigureCanvasQTAgg as FigCanvas, \
> NavigationToolbar2QT as NavigationToolbar
> import numpy as np
> import pylab
>
>
> class DataGen(object):
> """ A silly class that generates pseudo-random data for
> display in the plot.
> """
> def __init__(self, init=50):
> self.data = self.init = init
>
> def next(self):
> self._recalc_data()
> return self.data
>
> def _recalc_data(self):
> delta = random.uniform(-0.5, 0.5)
> r = random.random()
>
> if r > 0.9:
> self.data += delta * 15
> elif r > 0.8:
> # attraction to the initial value
> delta += (0.5 if self.init > self.data else -0.5)
> self.data += delta
> else:
> self.data += delta
>
> class myThing():
> class myThread(Thread):
> def __init__(self):
> Thread.__init__(self)
> self.running = True
> self.vec = [0]
> self.dg = DataGen()
>
> print "Initializing myThread..."
>
> def run(self):
> print "Running myThread..."
> while self.running:
> time.sleep(1)
> self.vec.append(self.dg.next())
> print "Splat"
>
> def getVec(self):
> return self.vec
>
> def stop(self):
> self.running = False
>
> def __init__(self):
> self.theThread = self.myThread()
> self.threadRunning = True
> print "initializing myThing..."
> self.theThread.start()
>
> def __del__(self):
> self.theThread.stop()
>
> def getVec(self):
> #print self.theThread.vec[:]
> return self.theThread.vec[:]
>
>
> class ApplicationWindow(QtGui.QMainWindow):
> """ The main window of the application
> """
>
> def __init__(self):
> QtGui.QMainWindow.__init__(self)
> self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
> self.setWindowTitle('Demo: dynamic matplotlib graph')
>
> self.thing1 = myThing()
> self.thing2 = myThing()
> self.starttime = int(time.time())
>
>
> self.create_menu()
> #self.create_status_bar()
> self.create_main_panel()
>
> self.redraw_timer = QtCore.QTimer(self)
> QtCore.QObject.connect(self.redraw_timer,
> QtCore.SIGNAL("timeout()"), self.on_redraw_timer)
> self.redraw_timer.start(4000)
>
>
> def create_menu(self):
> menu_file = QtGui.QMenu("&File", self)
> #menu_file.addAction(u'&Save plot', self.on_save_plot,
> # QtCore.Qt.CTRL + QtCore.Qt.Key_S)
> menu_file.addSeparator()
> menu_file.addAction(u'E&xit', self.on_exit,
> QtCore.Qt.CTRL + QtCore.Qt.Key_X)
>
> self.menuBar().addMenu(menu_file)
>
> def create_main_panel(self):
> self.panel = QtGui.QFrame(self)
> self.setCentralWidget(self.panel)
>
> self.init_plot()
> self.canvas = FigCanvas(self.fig)
> self.canvas.setMinimumHeight(150)
>
> #self.toolbar = NavigationToolbar(self.canvas, None)
> self.vbox = QtGui.QVBoxLayout()
> self.vbox.addWidget(self.canvas)
>
> self.panel.setLayout(self.vbox)
> #self.vbox.Fit(self)
>
> self.unit = 20
> width, height = self.geometry().width(), self.geometry().height()
> self.show()
>
> def init_plot(self):
> self.dpi = 100
> self.fig = Figure((5.0, 3.0), dpi=self.dpi)
>
> self.axes = self.fig.add_subplot(111, navigate=False)
> self.axes.set_axis_bgcolor('black')
>
> self.axes.set_title('Very important random data', size=10)
> self.axes.set_xlabel('Time flies like an arrow',size=10)
> self.axes.set_ylabel('Random is just random',size=10)
>
> pylab.setp(self.axes.get_xticklabels(), fontsize=8)
> pylab.setp(self.axes.get_yticklabels(), fontsize=8)
>
> self.plot_data = self.axes.plot(
> self.thing1.getVec(),
> linewidth=0.5,
> color=(1, 1, 0),
> #marker='o',
> label="set1",
> )[0]
> print self.thing1.getVec(), "<<>>"
> self.plot_data2 = self.axes.plot(
> self.thing2.getVec(),
> linewidth=1,
> dashes=[.2, .4],
> color=(0, 1, 1),
> label="set2",
> )[0]
>
>
> def draw_plot(self):
> """ Redraws the plot
> """
> self.data = self.thing1.getVec()
> self.data2 = self.thing2.getVec()
> def do_cal(urdata):
> newdata = []
> for x in range(len(urdata)):
> urtime = x + self.starttime
> newdata.append(urtime)
> return newdata
>
> xmax = len(self.data) if len(self.data) > 50 else 50
>
> xmin = xmax - 50
>
> min1 = min(self.data)
> min2 = min(self.data2)
> theMin = min(min1, min2)
>
> ymin = round(theMin, 0) - 1
>
> max1 = max(self.data)
> max2 = max(self.data2)
> theMax = max(max1, max2)
>
> ymax = round(theMax, 0) + 1
>
> self.axes.set_xbound(lower=xmin, upper=xmax)
> self.axes.set_ybound(lower=ymin, upper=ymax)
>
> self.axes.grid(True, color='gray')
> pylab.setp(self.axes.get_xticklabels(),
> visible=True)
>
> self.plot_data.set_xdata(np.arange(len(self.data)))
> self.plot_data.set_ydata(np.array(self.data))
> self.plot_data2.set_xdata(np.arange(len(self.data2)))
> #self.plot_data2.set_xdata(np.array(newdata2))
> self.plot_data2.set_ydata(np.array(self.data2))
>
> self.canvas.draw()
>
>
> def on_redraw_timer(self):
> self.draw_plot()
>
> def on_exit(self):
> self.close()
>
> def closeEvent(self, event):
> for thing in (self.thing1, self.thing2):
> thing.theThread.stop()
> thing.theThread.join()
>
> if __name__ == '__main__':
> app = QtGui.QApplication(sys.argv)
> aw = ApplicationWindow()
> aw.show()
> sys.exit(app.exec_())
>
> #################################
> [image: 内嵌图片 1]
>