Introduction to
Machine Learing
The science of getting computers to act without being explicitly programmed.
-Stanford University CS 229 (Machine Learning)
What is Machine Learning?
Inference and learning with massive datasets using intelligent machines.
-UBC CSPC340 (Machine Learning & Data Mining)
A branch of artificial intelligence that relies heavily on probability statistics uses data to make predictions and learn.
- The Economist
Get some insights from a process by which computer scientists direct a program to pore through a huge database.
- Harvard Business Review
Artificial Intelligence
Machine Learning
Data Mining
The Restaurant Case
John
Jack used to come a lot, why he hasn't showed up for a while?
Why Bill's bar is more popular?
Is Roy a slow server?
Vancouver's best selling beer
Average cost to run a restaurant
Transaction records related to Jack
......
Popular sauces
Popular restaurants
Query From Computer
Busiest hour of the week
Data Driven Decision
John
People like the happy hour in Bill's Bar so much that the keep going there even when it's not happy hour.
Roy is a great server, he sells more food, and that's why it seems like he is slow.
The Honey BBQ Rib is the best seller, and it has 10% chance of sold out during weekend. So get enough stock before weekend.
But,is that good enough?
But, Is that Good Enough?
MachineLearning.py
import os
import scipy as sp
import matplotlib.pyplot as plt
print("I'm MachineLearning") def ML(models, x, y):
if models:
if mx is None and x = 0
for x, y in zip(models):
# print "Model:",model
# print "Coeffs:",model.coeffs
plt.plot(model(x), c=color)
plt.legend(["d=%i" % m.order for m in models], loc="upper left") Python Hi, Python.
Meh~
Look!
Machine Found A Pattern
MachineLearning.py
import os
import scipy as sp
import matplotlib.pyplot as plt
print("I'm MachineLearning") def ML(models, x, y):
if models:
if mx is None and x = 0
for x, y in zip(models):
# print "Model:",model
# print "Coeffs:",model.coeffs
plt.plot(model(x), c=color)
plt.legend(["d=%i" % m.order for m in models], loc="upper left") Python Hi, Python.
Top Restaurants
Other Restaurants
Factor 2
Factor 1
Machine Found Another Pattern
MachineLearning.py
import os
import scipy as sp
import matplotlib.pyplot as plt
print("I'm MachineLearning") def ML(models, x, y):
if models:
if mx is None and x = 0
for x, y in zip(models):
# print "Model:",model
# print "Coeffs:",model.coeffs
plt.plot(model(x), c=color)
plt.legend(["d=%i" % m.order for m in models], loc="upper left") Python Hi, Python.
Top Restaurants
Other Restaurants
Factor 4
Factor 3
Let the Machine Decide
MachineLearning.py
import os
import scipy as sp
import matplotlib.pyplot as plt
print("I'm MachineLearning") def ML(models, x, y):
if models:
if mx is None and x = 0
for x, y in zip(models):
# print "Model:",model
# print "Coeffs:",model.coeffs
plt.plot(model(x), c=color)
plt.legend(["d=%i" % m.order for m in models], loc="upper left") Python Hi, Python.
Hey John, let's talk.
Factor 1, 34, 42443, 254432 & 4342343214 are the most significant factors. Align your strategies in those factors with the best restaurants. You can beat Bill's Bar in a week.
Machine Does It Better
KPI
View Span
John's View
Bill's View
Machine's View
“A computer program is said to learn from experience E with respect to some task T and some performance measure P, if its performance on T, as measured by P, improves with experience E.”
-- Tom Mitchell, Carnegie Mellon University
Chess Playing
Experience: playing chess games 10,000 times
Task: playing checkers
Performance measures: probability that win the play
Machine Learning Algorithms
Supervised Learning
Unsupervised Learning
Supervised Learning
Right Answer Given
Unsupervised Learning
Learn by self
Organize computing clusters
social network analysis
market segmentation
astronomical data analysis
Machine Learning
is
everywhere
Customized Recommendation
Handwriting recognition
Face Recognition
Ranking webpages
Database Mining
Application cannot program by hand
Self-customizing program
Softwares
http://www.forbes.com/sites/85broads/2014/01/06/six-novel-machine-learning-applications/
http://www.wsj.com/articles/SB10001424052748703834604575365310813948080
ML
By Frank Qiu
ML
Machine Learning Presentation
