Python matplotlib.use函数代码示例

    def setUpClass(cls):
        try:
            import matplotlib as mpl

            mpl.use("Agg", warn=False)
        except ImportError:
            raise nose.SkipTest

def showKernel(dataOrMatrix, fileName = None, useLabels = True, **args) :
 
    labels = None
    if hasattr(dataOrMatrix, 'type') and dataOrMatrix.type == 'dataset' :
	data = dataOrMatrix
	k = data.getKernelMatrix()
	labels = data.labels
    else :
	k = dataOrMatrix
	if 'labels' in args :
	    labels = args['labels']

    import matplotlib

    if fileName is not None and fileName.find('.eps') > 0 :
        matplotlib.use('PS')
    from matplotlib import pylab

    pylab.matshow(k)
    #pylab.show()

    if useLabels and labels.L is not None :
	numPatterns = 0
	for i in range(labels.numClasses) :
	    numPatterns += labels.classSize[i]
	    #pylab.figtext(0.05, float(numPatterns) / len(labels), labels.classLabels[i])
	    #pylab.figtext(float(numPatterns) / len(labels), 0.05, labels.classLabels[i])
	    pylab.axhline(numPatterns, color = 'black', linewidth = 1)
	    pylab.axvline(numPatterns, color = 'black', linewidth = 1)
    pylab.axis([0, len(labels), 0, len(labels)])
    if fileName is not None :
        pylab.savefig(fileName)
	pylab.close()

def plot_gen(ping, now, t, nans, host, interactive=False, size="1280x640"):
    ''' Generates ping vs time plot '''
    if not interactive:
        import matplotlib
        matplotlib.use("Agg") # no need to load gui toolkit, can run headless
    import matplotlib.pyplot as plt
    
    size      = [int(dim) for dim in size.split('x')]
    datestr   = now[0].ctime().split()
    datestr   = datestr[0] + " " + datestr[1] + " " + datestr[2] + " " + datestr[-1]
    plt.figure(figsize=(size[0]/80.,size[1]/80.)) # dpi is 80
    plt.plot(now[~nans], ping[~nans], drawstyle='steps', marker='+')
    plt.title("Ping Results for {0}".format(host))
    plt.ylabel("Latency [ms]")
    plt.xlabel("Time, {0} [GMT -{1} hrs]".format(datestr, time.timezone/3600))
    plt.xticks(size=10)
    plt.yticks(size=10)
    plt.ylim(ping[~nans].min()-5, ping[~nans].max()+5)
    
    # plot packet losses
    start  = []
    finish = []
    for i in range(len(nans)):
        if nans[i] == True:
            if i == 0:
                start.append(i)
            elif nans[i] != nans[i-1]:
                start.append(i)
            #if i != len(nans) and nans[i+1] != nans[i]:
            #    finish.append(i)
                
    # add the red bars for bad pings
    for i in range(len(start)):
        plt.axvspan(now[start[i]], now[finish[i]+1], color='red')
    return plt

 def testTelescope(self):
     import matplotlib
     matplotlib.use('AGG')
     import matplotlib.mlab as ml
     import pylab as pl
     import time        
     w0 = 8.0
     k = 2*np.pi/3.0
     gb = GaussianBeam(w0, k)
     lens = ThinLens(150, 150)
     gb2 = lens*gb
     self.assertAlmostEqual(gb2._z0, gb._z0 + 2*150.0)
     lens2 = ThinLens(300, 600)
     gb3 = lens2*gb2
     self.assertAlmostEqual(gb3._z0, gb2._z0 + 2*300.0)
     self.assertAlmostEqual(gb._w0, gb3._w0/2.0)
     z = np.arange(0, 150)
     z2 = np.arange(150, 600)
     z3 = np.arange(600, 900)
     pl.plot(z, gb.w(z, k), z2, gb2.w(z2, k), z3, gb3.w(z3, k))
     pl.grid()
     pl.xlabel('z')
     pl.ylabel('w')
     pl.savefig('testTelescope1.png')
     time.sleep(0.1)
     pl.close('all')        

    def screeplot(self, type="barplot", **kwargs):
        """
        Produce the scree plot
        :param type: type of plot. "barplot" and "lines" currently supported
        :param show: if False, the plot is not shown. matplotlib show method is blocking.
        :return: None
        """
        # check for matplotlib. exit if absent.
        try:
            imp.find_module('matplotlib')
            import matplotlib
            if 'server' in kwargs.keys() and kwargs['server']: matplotlib.use('Agg', warn=False)
            import matplotlib.pyplot as plt
        except ImportError:
            print "matplotlib is required for this function!"
            return

        variances = [s**2 for s in self._model_json['output']['importance'].cell_values[0][1:]]
        plt.xlabel('Components')
        plt.ylabel('Variances')
        plt.title('Scree Plot')
        plt.xticks(range(1,len(variances)+1))
        if type == "barplot": plt.bar(range(1,len(variances)+1), variances)
        elif type == "lines": plt.plot(range(1,len(variances)+1), variances, 'b--')
        if not ('server' in kwargs.keys() and kwargs['server']): plt.show()

def plot_lines_iamondb_example(X, title=None, index=None, ax=None, equal=True,
                               save=True):
    if save:
        import matplotlib
        matplotlib.use('Agg')
    import matplotlib.pyplot as plt
    if ax is None:
        f, ax = plt.subplots()
    points = list(np.where(X[:, 0] > 0)[0])
    start_points = [0] + points
    stop_points = points + [len(X)]
    ax.get_xaxis().set_visible(False)
    ax.get_yaxis().set_visible(False)
    for start, stop in zip(start_points, stop_points):
        # Hack to actually separate lines...
        ax.plot(X[start + 2:stop, 1], X[start + 2:stop, 2], color="black")
    if equal:
        ax.set_aspect('equal')
    if title is not None:
        plt.title(title)
    if ax is None:
        if not save:
            plt.show()
        else:
            if index is None:
                t = time.time()
            else:
                t = index
            plt.savefig("lines_%i.png" % t)

    def __init__(self, controllers, recipelist, server=myserver.myserver(host="0.0.0.0", port=8080)):
        self.count = 0
        self.wapp = Bottle()
        self.controllers = controllers
        self.recipelist = recipelist
        self.server = server
        self.stages = {}
        self.runningRecipeName = ""
        self.selectedRecipeName = ""
        self.recipeObject = None

        self.switchdict = {"lights": True, "camera": False, "sound": True}

        matplotlib.use("Agg")

        # Routing statements
        self.wapp.route("/status", "GET", self.statusPage)
        self.wapp.route("/", "GET", self.indexPage)
        self.wapp.route("/start", "GET", self.commandPage)
        self.wapp.route("/start", "POST", self.doCommand)
        self.wapp.route("/recipelist", "GET", self.recipeliststatusPage)
        self.wapp.route("/recipelist", "POST", self.dorecipeliststatus)
        self.wapp.route("/debugStages", "GET", self.debugStages)
        self.wapp.route("/readrecipes", "GET", self.getTestRecipeList)

        self.wapp.route("/switchlist", "GET", self.switchliststatusPage)
        self.wapp.route("/switchlist", "POST", self.doswitchliststatus)

        self.wapp.route("/temp", "GET", self.tempPage)
        self.wapp.route("/ingredients", "GET", self.ingredientsPage)
        self.wapp.route("/static/<filename>", "GET", self.server_static)

        self.s2b = stages2beer.s2b(controllers, self.stages)
        self.dl = ctrl.datalogger(controllers)

    def plot(self, path, only=None, title=None):
        import matplotlib
        matplotlib.use('Agg')
        import matplotlib.pyplot as plt
        import matplotlib.gridspec as gridspec

        _only = set(only) if only is not None else set(self.ssmap.values())
        rmap  = dict([(v,k) for (k,v) in self.ssmap.iteritems()])
        only  = set([rmap.get(name) for name in _only])


        stats   = self.stats()
        xaxis   = np.array(sorted(stats.keys()))
        totals  = np.zeros(len(xaxis))
        ss_perc = collections.defaultdict(lambda: np.zeros(len(xaxis)))
        for i, x in enumerate(xaxis):
            total = sum(stats[x].values())
            totals[i] = total
            for ss, count in stats[x].iteritems():
                if ss in only: name = ss
                else:          name = 'other'
                ss_perc[name][i] += 100 * count / float(total)
        self.colormap['other'] = 'black'
        self.ssmap['other'] = 'other'

        xaxis /= 10.**3 # convert to ns
        gs = gridspec.GridSpec(2, 1, hspace=0, height_ratios=[1,10])

        # frame counts
        plt.subplot(gs[0])
        plt.title(title)
        ax = plt.gca()
        plt.bar(xaxis, totals, 1, color='grey', alpha=.5)
        ax.yaxis.tick_right()
        ax.yaxis.set_label_position('right')
        plt.ylabel('#')

        ax.yaxis.set_major_locator(plt.MaxNLocator(2))
        ax.xaxis.set_visible(False)
        # ax.spines['bottom'].set_visible(False)
        # ax.xaxis.set_ticks_position('none')

        # aggregate SS data
        plt.subplot(gs[1])
        for ss in ss_perc.keys():
            color = self.colormap[ss]
            color = color if not color == '#FFFFFF' else 'black'
            style = ':' if color is 'black' else '-'
            plt.plot(xaxis, ss_perc[ss], linestyle=style,
                       color=color, label=self.ssmap[ss], lw=3, alpha=.6)

        plt.ylabel('%')
        plt.xlabel('Time (ns)')
        ax = plt.gca()
        # ax.tick_params('x', labeltop='off')
        # ax.spines['top'].set_visible(False)
        # ax.xaxis.set_ticks_position('none')
        plt.legend(loc='best', fontsize=9, frameon=False, ncol=len(self.ssmap)/2)

        plt.savefig(path, bbox_inches='tight')

def create_figures(data):
    import numpy as np
    print "# Creating figure ..."
    # prepare matplotlib
    import matplotlib
    matplotlib.rc("font",**{"family":"sans-serif"})
    matplotlib.rcParams.update({'font.size': 14})
    matplotlib.rc("text", usetex=True)
    matplotlib.use("PDF")
    import matplotlib.pyplot as plt

    # KSP
    plt.figure(1)
    n, bins, patches = plt.hist(data[:, 1], bins = 50, fc = "k", ec = "w")
    plt.xticks(range(300, 1001, 100), range(300, 1001, 100))
    plt.yticks(range(0, 17, 2), range(0, 17, 2))
    plt.xlabel("Model years")
    plt.ylabel("Occurrence")
    plt.savefig("parameterrange-ksp", bbox_inches = "tight")

    # SNES
    plt.figure(2)
    n, bins, patches = plt.hist(data[:, 0], bins = 50, fc = "k", ec = "w")
    plt.xticks(range(5, 46, 5), range(5, 46, 5))
    plt.yticks(range(0, 15, 2), range(0, 15, 2))
    plt.xlabel("Newton steps")
    plt.ylabel("Occurrence")
    plt.savefig("parameterrange-snes", bbox_inches = "tight")

def setup():
    # The baseline images are created in this locale, so we should use
    # it during all of the tests.
    import locale
    import warnings
    from matplotlib.backends import backend_agg, backend_pdf, backend_svg

    try:
        locale.setlocale(locale.LC_ALL, str('en_US.UTF-8'))
    except locale.Error:
        try:
            locale.setlocale(locale.LC_ALL, str('English_United States.1252'))
        except locale.Error:
            warnings.warn(
                "Could not set locale to English/United States. "
                "Some date-related tests may fail")

    use('Agg', warn=False)  # use Agg backend for these tests

    # These settings *must* be hardcoded for running the comparison
    # tests and are not necessarily the default values as specified in
    # rcsetup.py
    rcdefaults()  # Start with all defaults

    set_font_settings_for_testing()

	def __init__(self,master,title):
		Toplevel.__init__(self,master)
		self.master = master

		from __init__ import MATPLOTLIB_BACKEND
		if MATPLOTLIB_BACKEND != None:
			print "manipulator: Setting matplotlib backend to \"TkAgg\"."
			
		import matplotlib
		matplotlib.use("TkAgg")

		from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
		from matplotlib.figure import Figure
		from matplotlib import pyplot

		self.title(title)
		self.resizable(True,True)
		self.fig = pyplot.figure()
		pyplot.ion()

		self.canvas = FigureCanvasTkAgg(self.fig, master=self)
		self.canvas.show()
		self.canvas.get_tk_widget().pack(side=TOP, fill=BOTH, expand=1)
		self.canvas._tkcanvas.pack(side=TOP, fill=BOTH, expand=1)
		self.update()

		self.experiments = []

    def run_tests(self):
        import matplotlib
        matplotlib.use('agg')
        import nose
        from matplotlib.testing.noseclasses import KnownFailure
        from matplotlib import default_test_modules as testmodules
        from matplotlib import font_manager
        import time
        # Make sure the font caches are created before starting any possibly
        # parallel tests
        if font_manager._fmcache is not None:
            while not os.path.exists(font_manager._fmcache):
                time.sleep(0.5)
        plugins = [KnownFailure]

        # Nose doesn't automatically instantiate all of the plugins in the
        # child processes, so we have to provide the multiprocess plugin
        # with a list.
        from nose.plugins import multiprocess
        multiprocess._instantiate_plugins = plugins

        if self.omit_pep8:
            testmodules.remove('matplotlib.tests.test_coding_standards')
        elif self.pep8_only:
            testmodules = ['matplotlib.tests.test_coding_standards']

        nose.main(addplugins=[x() for x in plugins],
                  defaultTest=testmodules,
                  argv=['nosetests'] + self.test_args,
                  exit=True)

def matplotAnimationLibMovie():
	# Use matplotlib's animation library to directly output an mp4.
	import numpy as np
	import matplotlib
	matplotlib.use('TKAgg')
	from matplotlib import pyplot as plt
	from matplotlib import animation
	def update_line(num, data, line):
		line.set_data(data[...,:num])
		return line,
	fig1 = plt.figure()
	data = np.random.rand(2, 25)
	l, = plt.plot([], [], 'r-')
	plt.xlim(0, 1)
	plt.ylim(0, 1)
	plt.xlabel('x')
	plt.title('test')
	line_ani = animation.FuncAnimation(fig1, update_line, 25, fargs=(data, l),
		interval=50, blit=True)
	line_ani.save('outLines.mp4')
	fig2 = plt.figure()
	x = np.arange(-9, 10)
	y = np.arange(-9, 10).reshape(-1, 1)
	base = np.hypot(x, y)
	ims = []
	for add in np.arange(15):
		ims.append((plt.pcolor(x, y, base + add, norm=plt.Normalize(0, 30)),))
	im_ani = animation.ArtistAnimation(fig2, ims, interval=50, repeat_delay=3000,
		blit=True)
	im_ani.save('outSurface.mp4', metadata={'artist':'Guido'})

    def begin(self):
        #
        # We monkey-patch javabridge.start_vm here in order to
        # set up the ImageJ event bus (actually 
        # org.bushe.swing.event.ThreadSafeEventService) to not start
        # its cleanup thread which semi-buggy hangs around forever
        # and prevents Java from exiting.
        #
        def patch_start_vm(*args, **kwargs):
            jvm_args = list(args[0]) +  [
                "-Dloci.bioformats.loaded=true",
                "-Djava.util.prefs.PreferencesFactory="+
                "org.cellprofiler.headlesspreferences"+
                ".HeadlessPreferencesFactory"]
            #
            # Find the ij1patcher
            #
            if hasattr(sys, 'frozen') and sys.platform == 'win32':
                root = os.path.dirname(sys.argv[0])
            else:
                root = os.path.dirname(__file__)
            jardir = os.path.join(root, "imagej", "jars")
            patchers = sorted([
                    x for x in os.listdir(jardir)
                    if x.startswith("ij1-patcher") and x.endswith(".jar")])
            if len(patchers) > 0:
                jvm_args.append(
                    "-javaagent:%s=init" % os.path.join(jardir, patchers[-1]))
            result = start_vm(jvm_args, *args[1:], **kwargs)
            if javabridge.get_env() is not None:
                try:
                    event_service_cls = javabridge.JClassWrapper(
                        "org.bushe.swing.event.ThreadSafeEventService")
                    event_service_cls.CLEANUP_PERIOD_MS_DEFAULT = None
                except:
                    pass
            return result
        patch_start_vm.func_globals["start_vm"] = javabridge.start_vm
        javabridge.start_vm = patch_start_vm
        if "CP_EXAMPLEIMAGES" in os.environ:
            self.temp_exampleimages = None
        else:
            self.temp_exampleimages = tempfile.mkdtemp(prefix="cpexampleimages")

        if "CP_TEMPIMAGES" in os.environ:
            self.temp_images = None
        else:
            self.temp_images = tempfile.mkdtemp(prefix="cptempimages")
        #
        # Set up matplotlib for WXAgg if in frozen mode
        # otherwise it looks for TK which isn't there
        #
        if hasattr(sys, 'frozen'):
            import matplotlib
            matplotlib.use("WXAgg")
        try:
            from ilastik.core.jobMachine import GLOBAL_WM
            GLOBAL_WM.set_thread_count(1)
        except:
            pass

def activate_matplotlib(backend):
    """Activate the given backend and set interactive to True."""

    import matplotlib
    if backend.startswith('module://'):
        # Work around bug in matplotlib: matplotlib.use converts the
        # backend_id to lowercase even if a module name is specified!
        matplotlib.rcParams['backend'] = backend
    else:
        matplotlib.use(backend)
    matplotlib.interactive(True)

    # This must be imported last in the matplotlib series, after
    # backend/interactivity choices have been made
    import matplotlib.pylab as pylab

    # XXX For now leave this commented out, but depending on discussions with
    # mpl-dev, we may be able to allow interactive switching...
    #import matplotlib.pyplot
    #matplotlib.pyplot.switch_backend(backend)

    pylab.show._needmain = False
    # We need to detect at runtime whether show() is called by the user.
    # For this, we wrap it into a decorator which adds a 'called' flag.
    pylab.draw_if_interactive = flag_calls(pylab.draw_if_interactive)