1""" 2================= 3Demo Axes Divider 4================= 5 6Axes divider to calculate location of axes and 7create a divider for them using existing axes instances. 8""" 9import matplotlib.pyplot as plt 10 11 12def get_demo_image(): 13 import numpy as np 14 from matplotlib.cbook import get_sample_data 15 f = get_sample_data("axes_grid/bivariate_normal.npy", asfileobj=False) 16 z = np.load(f) 17 # z is a numpy array of 15x15 18 return z, (-3, 4, -4, 3) 19 20 21def demo_simple_image(ax): 22 Z, extent = get_demo_image() 23 24 im = ax.imshow(Z, extent=extent, interpolation="nearest") 25 cb = plt.colorbar(im) 26 plt.setp(cb.ax.get_yticklabels(), visible=False) 27 28 29def demo_locatable_axes_hard(fig1): 30 31 from mpl_toolkits.axes_grid1 \ 32 import SubplotDivider, LocatableAxes, Size 33 34 divider = SubplotDivider(fig1, 2, 2, 2, aspect=True) 35 36 # axes for image 37 ax = LocatableAxes(fig1, divider.get_position()) 38 39 # axes for colorbar 40 ax_cb = LocatableAxes(fig1, divider.get_position()) 41 42 h = [Size.AxesX(ax), # main axes 43 Size.Fixed(0.05), # padding, 0.1 inch 44 Size.Fixed(0.2), # colorbar, 0.3 inch 45 ] 46 47 v = [Size.AxesY(ax)] 48 49 divider.set_horizontal(h) 50 divider.set_vertical(v) 51 52 ax.set_axes_locator(divider.new_locator(nx=0, ny=0)) 53 ax_cb.set_axes_locator(divider.new_locator(nx=2, ny=0)) 54 55 fig1.add_axes(ax) 56 fig1.add_axes(ax_cb) 57 58 ax_cb.axis["left"].toggle(all=False) 59 ax_cb.axis["right"].toggle(ticks=True) 60 61 Z, extent = get_demo_image() 62 63 im = ax.imshow(Z, extent=extent, interpolation="nearest") 64 plt.colorbar(im, cax=ax_cb) 65 plt.setp(ax_cb.get_yticklabels(), visible=False) 66 67 68def demo_locatable_axes_easy(ax): 69 from mpl_toolkits.axes_grid1 import make_axes_locatable 70 71 divider = make_axes_locatable(ax) 72 73 ax_cb = divider.new_horizontal(size="5%", pad=0.05) 74 fig1 = ax.get_figure() 75 fig1.add_axes(ax_cb) 76 77 Z, extent = get_demo_image() 78 im = ax.imshow(Z, extent=extent, interpolation="nearest") 79 80 plt.colorbar(im, cax=ax_cb) 81 ax_cb.yaxis.tick_right() 82 ax_cb.yaxis.set_tick_params(labelright=False) 83 84 85def demo_images_side_by_side(ax): 86 from mpl_toolkits.axes_grid1 import make_axes_locatable 87 88 divider = make_axes_locatable(ax) 89 90 Z, extent = get_demo_image() 91 ax2 = divider.new_horizontal(size="100%", pad=0.05) 92 fig1 = ax.get_figure() 93 fig1.add_axes(ax2) 94 95 ax.imshow(Z, extent=extent, interpolation="nearest") 96 ax2.imshow(Z, extent=extent, interpolation="nearest") 97 ax2.yaxis.set_tick_params(labelleft=False) 98 99 100def demo(): 101 102 fig1 = plt.figure(1, (6, 6)) 103 fig1.clf() 104 105 # PLOT 1 106 # simple image & colorbar 107 ax = fig1.add_subplot(2, 2, 1) 108 demo_simple_image(ax) 109 110 # PLOT 2 111 # image and colorbar whose location is adjusted in the drawing time. 112 # a hard way 113 114 demo_locatable_axes_hard(fig1) 115 116 # PLOT 3 117 # image and colorbar whose location is adjusted in the drawing time. 118 # a easy way 119 120 ax = fig1.add_subplot(2, 2, 3) 121 demo_locatable_axes_easy(ax) 122 123 # PLOT 4 124 # two images side by side with fixed padding. 125 126 ax = fig1.add_subplot(2, 2, 4) 127 demo_images_side_by_side(ax) 128 129 plt.draw() 130 plt.show() 131 132 133demo() 134