figure-6.py

import numpy as np
import matplotlib.pyplot as plt

n = 20
Z = np.linspace(0,1,n*n).reshape(n,n)
Z = (Z-Z.min())/(Z.max()-Z.min())
Z += np.random.uniform(0,1,(n,n))

plt.figure(figsize=(20,8))

ax = plt.subplot(1,2,1, aspect=1)
values = [30.,20.,15.,10.]
x, y = 0.0, 0.5
for value in values:
    r1 = .5* (value / values[0])
    r2 = .5* ((np.sqrt(value/np.pi))/(np.sqrt(values[0]/np.pi)))
    ax.add_artist(plt.Circle( (x+r2,y), r1, color='r'))
    ax.add_artist(plt.Circle( (x+r2,1.5+y), r2, color='k'))
    fontsize = 2*value
#    plt.text(x+r2, y, "%d" % value, color="white", family = "Times New Roman",
#             fontsize=fontsize, ha="center", va="center")
#    plt.text(x+r2, 1.5+y, "%d" % value, color="white", family = "Times New Roman",
#             fontsize=fontsize, ha="center", va="center")
    x += 2*r2 + 0.05
plt.axhline(1.25, c='k')
plt.text(0.0, 1.25+0.05, "Relative size using disc area",
         ha="left", va="bottom",color=".25")
plt.text(0.0, 1.25-0.05, "Relative size using disc radius",
         ha="left", va="top",color=".25")
plt.xlim(-0.05, 3.5)
plt.ylim(-0.05, 2.6)
plt.axis('off')


ax = plt.subplot(1,2,2, aspect=1)

plt.axhline(5, c='k')
plt.text(0.0, 5+0.15, "Relative size using full range",
         ha="left", va="bottom",color=".25")
plt.text(0.0, 5-0.15, "Relative size using partial range",
         ha="left", va="top",color=".25")


n = 10
np.random.seed(123)
X = 0.25+np.arange(n)
Y = 2+np.random.uniform(.75,.85,n)

plt.bar(X, 5*(Y-2.2), .9, color='k', ec='None',bottom=6)
plt.bar(X, 20*(Y-2.75), .9, color='r', ec='None',bottom=1)

plt.xlim(-0.05, 10.5)
plt.ylim(-0.05, 10.5)
plt.axis('off')

plt.savefig("figure-6.pdf")
plt.show()