Python pyplot.axis函数代码示例

 def test_prop(self):
     N = 800.0
     V = linspace(5.0,51.0,50)
     rho = 1.2255
     beta = 45.0
     J    = list()
     CT   = list()
     CP   = list()
     effy = list()
     for v in V:
         data = self.analyze_prop(beta,N,v,rho)
         J.append(data[2])
         CT.append(data[3])
         CP.append(data[4])
         effy.append(data[5])
     plt.figure(1)
     plt.grid(True)
     plt.hold(True)
     plt.plot(J,CT,'o-')
     plt.xlabel('J')
     plt.plot(J,CP,'ro-')
     plt.axis([0,2.5,0,0.15])
     plt.figure(2)
     plt.plot(J,effy,'gs-')
     plt.hold(True)
     plt.grid(True)
     plt.axis([0,2.5,0,1.0])
     plt.xlabel('advance ratio')
     plt.ylabel('efficiency')
     plt.show()

def do_plot(mode, content, wide):
	global style
	style.apply(mode, content, wide)

	data = np.load("data/prr_AsAu_%s%s.npz"%(content, wide))

	AU, TAU = np.meshgrid(-data["Au_range_dB"], data["tau_range"])
	Zu = data["PRR_U"]
	Zs = data["PRR_S"]

	assert TAU.shape == AU.shape == Zu.shape, "The inputs TAU, AU, PRR_U must have the same shape for plotting!"

	plt.clf()

	if mode in ("sync",):
		# Plot the inverse power ratio, sync signal is stronger for positive ratios
		CSf = plt.contourf(TAU, AU, Zs, levels=(0.0, 0.2, 0.4, 0.6, 0.8, 0.9, 1.0), colors=("1.0", "0.75", "0.5", "0.25", "0.15", "0.0"), origin="lower")
		CS2 = plt.contour(CSf, colors = ("r",)*5+("w",), linewidths=(0.75,)*5+(1.0,), origin="lower", hold="on")
	else:
		CSf  = plt.contourf(TAU, AU, Zs, levels=(0.0, 0.2, 0.4, 0.6, 0.8, 0.9, 1.0), colors=("1.0", "0.75", "0.5", "0.25", "0.15", "0.0"), origin="lower")
		CS2f = plt.contour(CSf, levels=(0.0, 0.2, 0.4, 0.6, 0.8, 1.0), colors=4*("r",)+("w",), linewidths=(0.75,)*4+(1.0,), origin="lower", hold="on")
		#CS2f = plt.contour(TAU, -AU, Zu, levels=(0.9, 1.0), colors=("0.0",), linewidths=(1.0,), origin="lower", hold="on")
		if content in ("unif",):
			CSu  = plt.contourf(TAU, AU, Zu, levels=(0.2, 1.0), hatches=("////",), colors=("0.75",), origin="lower")
			CS2  = plt.contour(CSu, levels=(0.2,), colors = ("r",), linewidths=(1.0,), origin="lower", hold="on")

	style.annotate(mode, content, wide)

	plt.axis([data["tau_range"][0], data["tau_range"][-1], -data["Au_range_dB"][-1], -data["Au_range_dB"][0]])

	plt.ylabel(r"Signal power ratio ($\mathrm{SIR}$)", labelpad=2)
	plt.xlabel(r"Time offset $\tau$ ($/T$)", labelpad=2)

	plt.savefig("pdf/prrc2_%s_%s%s_z.pdf"%(mode, content, wide))

def showOverlapTable(modes_x, modes_y, **kwargs):
    """Show overlap table using :func:`~matplotlib.pyplot.pcolor`.  *modes_x*
    and *modes_y* are sets of normal modes, and correspond to x and y axes of
    the plot.  Note that mode indices are incremented by 1.  List of modes
    is assumed to contain a set of contiguous modes from the same model.

    Default arguments for :func:`~matplotlib.pyplot.pcolor`:

      * ``cmap=plt.cm.jet``
      * ``norm=plt.normalize(0, 1)``"""

    import matplotlib.pyplot as plt

    overlap = abs(calcOverlap(modes_y, modes_x))
    if overlap.ndim == 0:
        overlap = np.array([[overlap]])
    elif overlap.ndim == 1:
        overlap = overlap.reshape((modes_y.numModes(), modes_x.numModes()))

    cmap = kwargs.pop('cmap', plt.cm.jet)
    norm = kwargs.pop('norm', plt.normalize(0, 1))
    show = (plt.pcolor(overlap, cmap=cmap, norm=norm, **kwargs),
            plt.colorbar())
    x_range = np.arange(1, modes_x.numModes() + 1)
    plt.xticks(x_range-0.5, x_range)
    plt.xlabel(str(modes_x))
    y_range = np.arange(1, modes_y.numModes() + 1)
    plt.yticks(y_range-0.5, y_range)
    plt.ylabel(str(modes_y))
    plt.axis([0, modes_x.numModes(), 0, modes_y.numModes()])
    if SETTINGS['auto_show']:
        showFigure()
    return show

    def zplane(self, title="", fontsize=18):
        """ Display filter in the complex plane

        Parameters
        ----------

        """
        rb = self.z
        ra = self.p

        t = np.arange(0, 2 * np.pi + 0.1, 0.1)
        plt.plot(np.cos(t), np.sin(t), "k")

        plt.plot(np.real(ra), np.imag(ra), "x", color="r")
        plt.plot(np.real(rb), np.imag(rb), "o", color="b")
        M1 = -10000
        M2 = -10000
        if len(ra) > 0:
            M1 = np.max([np.abs(np.real(ra)), np.abs(np.imag(ra))])
        if len(rb) > 0:
            M2 = np.max([np.abs(np.real(rb)), np.abs(np.imag(rb))])
        M = 1.6 * max(1.2, M1, M2)
        plt.axis([-M, M, -0.7 * M, 0.7 * M])
        plt.title(title, fontsize=fontsize)
        plt.show()

def vis_detections (im, class_name, dets, thresh=0.5):
    """Draw detected bounding boxes."""
    inds = np.where(dets[:, -1] >= thresh)[0]
    if len(inds) == 0:
        return

    im = im[:, :, (2, 1, 0)]
    fig, ax = plt.subplots(figsize=(12, 12))
    ax.imshow(im, aspect='equal')
    for i in inds:
        bbox = dets[i, :4]
        score = dets[i, -1]

        ax.add_patch(
            plt.Rectangle((bbox[0], bbox[1]),
                          bbox[2] - bbox[0],
                          bbox[3] - bbox[1], fill=False,
                          edgecolor='red', linewidth=3.5)
        )
        ax.text(bbox[0], bbox[1] - 2,
                '{:s} {:.3f}'.format(class_name, score),
                bbox=dict(facecolor='blue', alpha=0.5),
                fontsize=14, color='white')

    ax.set_title(('{} detections with '
                  'p({} | box) >= {:.1f}').format(class_name, class_name,
                                                  thresh),
                 fontsize=14)
    plt.axis('off')
    plt.tight_layout()
    plt.draw()

def influence_plot(X, y_true, y_pred, **kwargs):
    """Produces an influence plot.

    Parameters
    ----------
    X : array
        Design matrix.
    y_true : array_like
        Observed labels, either 0 or 1.
    y_pred : array_like
        Predicted probabilities, floats on [0, 1].

    Notes
    -----
    .. plot:: pyplots/influence_plot.py
    """
    r = pearson_residuals(y_true, y_pred)
    leverages = pregibon_leverages(X, y_pred)

    delta_X2 = case_deltas(r, leverages)
    dbetas = pregibon_dbetas(r, leverages)

    plt.scatter(y_pred, delta_X2, s=dbetas * 800, **kwargs)

    __, __, y1, y2 = plt.axis()
    plt.axis((0, 1, y1, y2))

    plt.xlabel('Predicted Probability')
    plt.ylabel(r'$\Delta \chi^2$')

    plt.tight_layout()

    def render(self, interval=50, **kwargs):
        import matplotlib.cm as cm
        import matplotlib.animation as animation
        import matplotlib.pyplot as plt

        p = self.plot_layout
        _axs = []
        for i in range(self.image_list[0].shape[2]):
            plt.subplot(p[0], p[1], 1 + i)
            # Hide the x and y labels
            plt.axis('off')
            _ax = plt.imshow(self.image_list[0][:, :, i], cmap=cm.Greys_r,
                             **kwargs)
            _axs.append(_ax)

        def init():
            return _axs

        def animate(j):
            for k, _ax in enumerate(_axs):
                _ax.set_data(self.image_list[j][:, :, k])
            return _axs

        self._ani = animation.FuncAnimation(self.figure, animate,
                                            init_func=init,
                                            frames=len(self.image_list),
                                            interval=interval, blit=True)
        return self

def cplot(data, limits=[None,None], CM = 'jet', fname='', ext='png'):
    """Make a color contour plot of data

    Usage: cplot(data, limits=[None,None], fname='')
    If no filename is specified a plot is displayed
    File format is ext (default is png)
    """

    SIZE = 12
    DPI  = 100

    nx, ny = data.shape[0], data.shape[1]
    data = data.reshape(nx,ny)
    scale  = SIZE/float(max(nx,ny))
    plt.figure(figsize=(scale*nx, scale*ny+1.0))
    plt.clf()
    c = plt.imshow(np.transpose(data), cmap=CM)
    plt.clim(limits)
    plt.axis([0,nx,0,ny])
    #cbar = plt.colorbar(c, ticks=np.arange(0.831,0.835,0.001), aspect = 20, orientation='vertical', shrink=0.72, extend='neither', spacing='proportional')
    #cbar = plt.colorbar(c, aspect = 40, orientation='vertical', shrink=0.72, extend='neither', spacing='proportional')
    #cbar = plt.colorbar(c, orientation='horizontal', shrink=1.0)
    cbar = plt.colorbar(c, orientation='vertical', shrink=0.72, extend='neither', spacing='proportional')
    
    cbar.ax.tick_params(labelsize=21,size=10)
    #cbar.ax.yaxis.set_ticks_position('left')
    #c.cmap.set_under(color='black')
    if len(fname) == 0:
        plt.show()
    else:
        plt.savefig(fname+'.'+ ext, format=ext, dpi=DPI, bbox_inches='tight', pad_inches=0.1)
        plt.close()

def xplot(data, limits=[None,None], fname='', func='max', label='',
        loc='upper right', ext='png'):
    """Make an axial plot of a funtion of data

    Usage: xplot(data, limits=[None,None], fname='', loc='upper left', ext='png')
    Possible functions to plot are max, min, avg
    If no filename is specified a plot is displayed
    The special filename 'M' turns "hold" on (for multiplots)
    File format is ext (default is png)
    """

    nx,ny = data.shape[0],data.shape[1]
    z = np.zeros([3,nx])
    for x in range(nx):
        z[0,x] = data[x,:].min()
        z[1,x] = data[x,:].max()
        z[2,x] = data[x,:].sum()/float(ny)

    #plt.plot(z[0], label=label+' min')
    #plt.plot(z[1], label=label+' max')
    plt.plot(z[2], label=label+' avg')

    if (fname == 'M'):
        plt.hold=True
    else:
        plt.legend(loc=loc)
        plt.axis([0,data.shape[0]-1,limits[0],limits[1]])
        plt.hold=False
        if len(fname) == 0:
            plt.show()
        else:
            plt.savefig(fname+'-x.'+ext, format=ext)
            plt.close()

def plot_residuals(turnstile_weather, predictions):
    '''
    Using the same methods that we used to plot a histogram of entries
    per hour for our data, why don't you make a histogram of the residuals
    (that is, the difference between the original hourly entry data and the predicted values).

    Based on this residual histogram, do you have any insight into how our model
    performed?  Reading a bit on this webpage might be useful:

    http://www.itl.nist.gov/div898/handbook/pri/section2/pri24.htm
    '''
    
    plt.figure()
    residuals = (turnstile_weather['ENTRIESn_hourly'] - predictions)
    residuals_mean = np.mean(residuals)
    residuals_std = np.std(residuals)
    residuals.hist(color='blue', bins=100, alpha=0.5)
    the_axis = [-15000, 20000, 0, 40000]
    plt.axis(the_axis)
    plt.xlabel('Actual Hourly Entries - Predictions')
    plt.ylabel('Freq')
    plt.title('Linear Regression with Gradient Descent Residuals')


    return plt, residuals_mean, residuals_std

	def plot_fun(self, x, y, x_min, x_max, y_min, y_max, style):
		fig = plt.figure()
		plt.axis([x_min, x_max, y_min, y_max])
		ax = fig.add_subplot(1, 1, 1)
		ax.plot(x, y, 'g')
		ax.set_xscale('log')
		plt.savefig('plot.png')

 def png(self, start_timestamp, end_timestamp):
     self.load(start_timestamp, end_timestamp)
     plt.figure(figsize=(10, 7.52))
     plt.rc("axes", labelsize=12, titlesize=14)
     plt.rc("font", size=10)
     plt.rc("legend", fontsize=7)
     plt.rc("xtick", labelsize=8)
     plt.rc("ytick", labelsize=8)
     plt.axes([0.08, 0.08, 1 - 0.27, 1 - 0.15])
     for plot in self.plots:
         plt.plot(self.timestamps, self.plots[plot], self.series_fmt(plot), label=self.series_label(plot))
     plt.axis("tight")
     plt.gca().xaxis.set_major_formatter(
         matplotlib.ticker.FuncFormatter(lambda x, pos=None: time.strftime("%H:%M\n%b %d", time.localtime(x)))
     )
     plt.gca().yaxis.set_major_formatter(
         matplotlib.ticker.FuncFormatter(lambda x, pos=None: locale.format("%.*f", (0, x), True))
     )
     plt.grid(True)
     plt.legend(loc=(1.003, 0))
     plt.xlabel("Time/Date")
     plt.title(
         self.description()
         + "\n%s to %s"
         % (
             time.strftime("%H:%M %d-%b-%Y", time.localtime(start_timestamp)),
             time.strftime("%H:%M %d-%b-%Y", time.localtime(end_timestamp)),
         )
     )
     output_buffer = StringIO.StringIO()
     plt.savefig(output_buffer, format="png")
     return output_buffer.getvalue()

def plothist():

	n_groups = 3

	means_men = (42.3113658071, 39.7803247373, 67.335243553)
	std_men = (1, 2, 3)

	fig, ax = plt.subplots()

	index = np.array([0.5,1.5,2.5])
	bar_width = 0.4

	opacity = 0.4
	error_config = {'ecolor': '0'}

	rects1 = plt.bar(index, means_men, bar_width,
	                 alpha=opacity,
	                 color='b',
	                 error_kw=error_config)

	plt.xlabel('Approach')
	plt.ylabel('Accuracy')
	plt.axis((0,3.4,0,100))
	plt.title('Evaluation')
	plt.xticks(index + bar_width/2, ('Bing Liu', 'AFINN', 'SentiWordNet'))
	plt.legend()

	plt.tight_layout()
	# plt.show()
	plt.savefig('foo.png')

def plot(i, pcanc, lr, pp, labelFlag, Y):
    if len(str(i)) == 1:
        fig = plt.figure(i)
    else:
        fig = plt.subplot(i)
    if pcanc == 0:
        plt.title(
                  ' learning_rate: ' + str(lr)
                + ' perplexity: ' + str(pp))
        print("Plotting tSNE")
    else:
        plt.title(
                  'PCA-n_components: ' + str(pcanc)
                + ' learning_rate: ' + str(lr)
                + ' perplexity: ' + str(pp))
        print("Plotting PCA-tSNE")
    plt.scatter(Y[:, 0], Y[:, 1], c=colors)
    if labelFlag == 1:
        for label, cx, cy in zip(y, Y[:, 0], Y[:, 1]):
            plt.annotate(
                label.decode('utf-8'),
                xy = (cx, cy),
                xytext = (-10, 10),
                fontproperties=font,
                textcoords = 'offset points', ha = 'right', va = 'bottom',
                bbox = dict(boxstyle = 'round,pad=0.5', fc = 'yellow', alpha = 0.9))
                #arrowprops = dict(arrowstyle = '->', connectionstyle = 'arc3,rad=0'))
    ax.xaxis.set_major_formatter(NullFormatter())
    ax.yaxis.set_major_formatter(NullFormatter())
    plt.axis('tight')
    print("Done.")

def yplot(data, limits=[None,None], fname='', xval=[0.5], label='',
        loc='upper left', ext='png'):
    """Make transverse plots of data

    Usage: yplot(data, limits=[None,None], fname='', xval=[0.5], label='',
        loc='upper left', ext='ext')
    xval is a list of axial distances in units of nx
    If no filename is specified a plot is displayed
    The special filename 'M' turns "hold" on (for multiplots)
    File format is ext (default is png)
    """

    nx, ny = data.shape[0], data.shape[1]

    y = np.array(range(ny)) + 0.5
    for x in xval:
        ix = int(x*nx)
        plt.plot(y, data[ix,:], label=label+" : "+"x="+str(x))

    if (fname == 'M'):
        plt.hold=True
    else:
        plt.axis([0,data.shape[1],limits[0],limits[1]])
        plt.legend(loc=loc)
        plt.hold=False
        if len(fname) == 0:
            plt.show()
        else:
            plt.savefig(fname+'-y.'+ext, format=ext)
            plt.close()