Transcript Lecture 1a - Courses - University of California, Berkeley

290: Data Mining,
InformationExtraction, and
(Business)Analytics
in Knowledge Services
Ram Akella
University of California
Berkeley & Silicon Valley Center
Lecture 1
January 19, 2011
Class Outline
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Knowledge Services, Data Mining, and Business
Analytics
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Internet marketing and online ads, financial services,
health services, service centers
Data Mining and Statistics
Focus of course
Prediction and Classification
Data and pre-processing: TSK Ch 2
Review of class
Look ahead for next class
Who?
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Who Should Take This Course?
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Graduate Students
Engineers and Managers who wish to
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Gain depth and/or perspective
Move into this area
(Potential) Entrepreneurs who wish to
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Brainstorm new ideas
Create process for startup
What?
What will you learn in this course?
 Techniques, software, and perspectives in:
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Statistics, Data Mining, and Business Analytics
Online marketing, computational advertising,
healthcare services, financial services,
service/call centers and text mining
Knowledge Services Examples
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Online Marketing (Ranking Ads)
User
Ad
Creatives
Target
Page
Targeting
Engine
...
Ads
...
Landing
Pages
...
...
Knowledge Services Examples
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Opinion Mining (Blog Trend)
Knowledge Services Examples
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Social Networks
Knowledge Services and Data Mining
What are Knowledge Services?
 What is Data Mining? Business Analytics?
 What is the connection between all three?
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Services
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What is a service?
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http://en.wikipedia.org/wiki/Service_(economi
cs)
A service is the non-material equivalent
of a good. A service provision is an
economic activity that does not result in
ownership
 Service professions
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
http://www.bls.gov/oco/oco1006.htm
Management and Business Professionals

http://www.bls.gov/oco/oco1001.htm
Knowledge Services
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Marketing
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Internet and other marketing campaigns
Online (computational) advertising
Financial Services
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How should you invest?
What are stock and industry trends?
Fraud detection
Knowledge Services (Continued)
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Health Services
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Body fat profile and weight prediction
Cancer identification
Social networks for diabetes knowledge sharing
Facebook!
Service Centers
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Call center management
Network prognostics and diagnostics
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Anomaly detection
Data Mining and Business Analytics
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Data Mining and Business Analytics
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Techniques to model and solve Knowledge
Services problems => This course
Decision Theory is an aspect of business
analytics
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Techniques to solve business management
decision making  Later courses
E.g. How many experts and technicians of
each type in a service center
Data Mining and Text Mining

Knowledge Services
Data Mining
Data Mining
Business Analytics
Decision analytics
Text Mining plus Image/Video Mining
Statistics and Data Mining - 1
How are statistics and data mining
related?
 Or are they not?
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Data Mining: Definitions
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Data mining is the nontrivial process of identifying, novel,
potentially useful, and ultimately understandable patterns
in data. - Fayyad.
Data mining is the process of extracting previously
unknown, comprehensible, and actionable information from
large databases and using it to make crucial business
decisions. - Zekulin.
Data Mining is a set of methods used in the knowledge
discovery process to distinguish previously unknown
relationships and patterns within data. - Ferruzza.
Data mining is the process of discovering advantageous
patterns in data. - John
Statistics
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Hypothesis testing
Experimental design
Response surface modeling
ANOVA, MANOVA, etc.
Linear regression
Discriminant analysis
Logistic regression
GLM
Canonical correlation
Principal components
Factor analysis
Data Mining
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Decision tree induction (C4.5, CART, CHAID)
Rule induction (AQ, CN2, Recon, etc.)
Nearest neighbors (case based reasoning)
Clustering methods (data segmentation)
Association rules (market basket analysis)
Feature extraction
Visualization
In addition, some include:
Neural networks
Bayesian belief networks (graphical models)
Genetic algorithms
Self-organizing maps
Course Focus
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In this course, we transition from one to
the other
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Good statistical basis enables more powerful
data mining techniques!
Every class
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Motivated by practical examples in Knowledge
Services
Solid grounding in techniques, software, data,
for statistics and data mining (machine
learning)
Statistics to Data Mining Transition
DM packages implement well known
procedures from machine learning,
pattern recognition, neural networks and
data visualization.
 Statistics concentrate on probabilistic
inference in information science while
DM also finds patterns in the data.
 Dimensionality reduction with statistical
assumptions can be applied in DM (PCA).
 Assessing data quality.
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Class Administration
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Office hours 1-2?, 5-6 pm?, Wed, by appt.
Ignore rst for now
Assignments and Projects: Postponement by 1 day – lose 10 points; 2 days, 20
points; then, 0 credit
Project grading will be identical; lose 10 points for one day delay, 20 for 2 days, and
0 credit subsequently
Quizzes and midterms: No postponement unless serious health or extraordinary work
situation; see TA and then instructor
Review website every day; you are responsible for monitoring and responding to
changes
Readings will be posted ahead of time; lecture PPTs just a bit before or after class
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You are expected to read and be prepared!
Homework will be posted by Wednesday (latest Friday) for you to work over weekend
and consult TA on Monday
Labs: has computers; similarly Labs, with course software
Prediction and Classification
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Classification
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Prediction
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Classification is the task of assigning objects to
one of several predefined categories.
A prediction is a statement or claim that a
particular event or value will occur in the
future in more certain terms than a forecast.
In DM, typically these tasks are performed
based on a set of attributes which describe
the object to classify or the variable to
predict.
Data and Pre-processing
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Lecture 1b
Review and Summary of Lecture 1
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Introduction to the course:
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Problems in Knowledge Services and Analytics.
Data Mining definitions and differences between
DM and Statistics.
Data types and issues:
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Types of attributes in data: Nominal, Ordinal,
Interval and Ratio.
Types of data sets: Record, Graph, Ordered.
Data quality issues: Noise and outliers, missing
values, duplicate data.
Review and Summary of Lecture 1
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Data preprocessing:
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Aggregation: data reduction, change of scale,
combination of features.
Sampling: random, with/without replacement,
stratified.
Dimensionality reduction: PCA, SVD.
Feature subset selection: brute-force,
embedded, filter, wrapper.
Feature creation: extraction (domain specific),
mapping to new space, combination of features.
Look-Ahead for Lecture 2
(and Boot camp 1)
Covariance Matrix.
 Notions of Linear Algebra
 Singular Value Decomposition
 Principal Component Analysis in detail
 Please take a look at chapter 4 of the
textbook.
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Guest Speaker
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Jeff Kreuelen
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Senior Manager, IBM Almaden
Text Mining, Service Centers
Service Analytics, Data Mining, Text Mining,
CRM, Marketing, Call Centers, Financial
Services