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'''
Created on Oct 6, 2010
@author: Peter
'''
from numpy import *
import matplotlib
import matplotlib.pyplot as plt
from matplotlib.patches import Rectangle
n = 1000 #number of points to create
xcord1 = []; ycord1 = []
xcord2 = []; ycord2 = []
xcord3 = []; ycord3 = []
markers =[]
colors =[]
fw = open('testSet.txt','w')
for i in range(n):
[r0,r1] = random.standard_normal(2)
myClass = random.uniform(0,1)
if (myClass <= 0.16):
fFlyer = random.uniform(22000, 60000)
tats = 3 + 1.6*r1
markers.append(20)
colors.append(2.1)
classLabel = 1 #'didntLike'
xcord1.append(fFlyer); ycord1.append(tats)
elif ((myClass > 0.16) and (myClass <= 0.33)):
fFlyer = 6000*r0 + 70000
tats = 10 + 3*r1 + 2*r0
markers.append(20)
colors.append(1.1)
classLabel = 1 #'didntLike'
if (tats < 0): tats =0
if (fFlyer < 0): fFlyer =0
xcord1.append(fFlyer); ycord1.append(tats)
elif ((myClass > 0.33) and (myClass <= 0.66)):
fFlyer = 5000*r0 + 10000
tats = 3 + 2.8*r1
markers.append(30)
colors.append(1.1)
classLabel = 2 #'smallDoses'
if (tats < 0): tats =0
if (fFlyer < 0): fFlyer =0
xcord2.append(fFlyer); ycord2.append(tats)
else:
fFlyer = 10000*r0 + 35000
tats = 10 + 2.0*r1
markers.append(50)
colors.append(0.1)
classLabel = 3 #'largeDoses'
if (tats < 0): tats =0
if (fFlyer < 0): fFlyer =0
xcord3.append(fFlyer); ycord3.append(tats)
fw.close()
fig = plt.figure()
ax = fig.add_subplot(111)
#ax.scatter(xcord,ycord, c=colors, s=markers)
type1 = ax.scatter(xcord1, ycord1, s=20, c='red')
type2 = ax.scatter(xcord2, ycord2, s=30, c='green')
type3 = ax.scatter(xcord3, ycord3, s=50, c='blue')
ax.legend([type1, type2, type3], ["Did Not Like", "Liked in Small Doses", "Liked in Large Doses"], loc=2)
ax.axis([-5000,100000,-2,25])
plt.xlabel('Frequent Flyier Miles Earned Per Year')
plt.ylabel('Percentage of Time Spent Playing Video Games')
plt.show()
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