This document defines key concepts in data mining tasks and knowledge representation. It discusses (1) task relevant data, background knowledge, interestingness measures, input/output representation, and visualization techniques used in data mining; (2) examples of concept hierarchies like schema, set-grouping, and rule-based hierarchies; and (3) common visualization techniques like histograms, scatterplots, and box plots used to analyze and present data mining results.
Data mining Basics and complete description Sulman Ahmed
This course is all about the data mining techniques and how we mine the data and get optimize results.This course is all about the data mining techniques and how we mine the data and get optimize results.This course is all about the data mining techniques and how we mine the data and get optimize results.This course is all about the data mining techniques and how we mine the data and get optimize results.This course is all about the data mining techniques and how we mine the data and get optimize results.This course is all about the data mining techniques and how we mine the data and get optimize results.This course is all about the data mining techniques and how we mine the data and get optimize results
Survey on Various Classification Techniques in Data Miningijsrd.com
Dynamic Classification is an information mining (machine learning) strategy used to anticipate bunch participation for information cases. In this paper, we show the essential arrangement systems. A few significant sorts of arrangement technique including induction, Bayesian networks, k-nearest neighbor classifier, case-based reasoning, genetic algorithm and fuzzy logic techniques. The objective of this review is to give a complete audit of distinctive characterization procedures in information mining.
Data Mining: Concepts and Techniques (3rd ed.)- Chapter 3 preprocessingSalah Amean
the chapter contains :
Data Preprocessing: An Overview,
Data Quality,
Major Tasks in Data Preprocessing,
Data Cleaning,
Data Integration,
Data Reduction,
Data Transformation and Data Discretization,
Summary.
Data mining Basics and complete description Sulman Ahmed
This course is all about the data mining techniques and how we mine the data and get optimize results.This course is all about the data mining techniques and how we mine the data and get optimize results.This course is all about the data mining techniques and how we mine the data and get optimize results.This course is all about the data mining techniques and how we mine the data and get optimize results.This course is all about the data mining techniques and how we mine the data and get optimize results.This course is all about the data mining techniques and how we mine the data and get optimize results.This course is all about the data mining techniques and how we mine the data and get optimize results
Survey on Various Classification Techniques in Data Miningijsrd.com
Dynamic Classification is an information mining (machine learning) strategy used to anticipate bunch participation for information cases. In this paper, we show the essential arrangement systems. A few significant sorts of arrangement technique including induction, Bayesian networks, k-nearest neighbor classifier, case-based reasoning, genetic algorithm and fuzzy logic techniques. The objective of this review is to give a complete audit of distinctive characterization procedures in information mining.
Data Mining: Concepts and Techniques (3rd ed.)- Chapter 3 preprocessingSalah Amean
the chapter contains :
Data Preprocessing: An Overview,
Data Quality,
Major Tasks in Data Preprocessing,
Data Cleaning,
Data Integration,
Data Reduction,
Data Transformation and Data Discretization,
Summary.
Data Analysis: Statistical Methods: Regression modelling, Multivariate Analysis - Classification: SVM & Kernel Methods - Rule Mining - Cluster Analysis, Types of Data in Cluster Analysis, Partitioning Methods, Hierarchical Methods, Density Based Methods, Grid Based Methods, Model Based Clustering Methods, Clustering High Dimensional Data - Predictive Analytics – Data analysis using R.
UNIT 3: Data Warehousing and Data MiningNandakumar P
UNIT-III Classification and Prediction: Issues Regarding Classification and Prediction – Classification by Decision Tree Introduction – Bayesian Classification – Rule Based Classification – Classification by Back propagation – Support Vector Machines – Associative Classification – Lazy Learners – Other Classification Methods – Prediction – Accuracy and Error Measures – Evaluating the Accuracy of a Classifier or Predictor – Ensemble Methods – Model Section.
Data Mining StepsProblem Definition Market AnalysisCsharondabriggs
Data Mining Steps
Problem Definition
Market Analysis
Customer Profiling, Identifying Customer Requirements, Cross Market Analysis, Target Marketing, Determining Customer purchasing pattern
Corporate Analysis and Risk Management
Finance Planning and Asset Evaluation, Resource Planning, Competition
Fraud Detection
Customer Retention
Production Control
Science Exploration
> Data Preparation
Data preparation is about constructing a dataset from one or more data sources to be used for exploration and modeling. It is a solid practice to start with an initial dataset to get familiar with the data, to discover first insights into the data and have a good understanding of any possible data quality issues. The Datasets you are provided in these projects were obtained from kaggle.com.
Variable selection and description
Numerical – Ratio, Interval
Categorical – Ordinal, Nominal
Simplifying variables: From continuous to discrete
Formatting the data
Basic data integrity checks: missing data, outliers
> Data Exploration
Data Exploration is about describing the data by means of statistical and visualization techniques.
· Data Visualization:
o
Univariate
analysis explores variables (attributes) one by one. Variables could be either categorical or numerical.
Univariate Analysis - Categorical
Statistics
Visualization
Description
Count
Bar Chart
The number of values of the specified variable.
Count%
Pie Chart
The percentage of values of the specified variable
Univariate Analysis - Numerical
Statistics
Visualization
Equation
Description
Count
Histogram
N
The number of values (observations) of the variable.
Minimum
Box Plot
Min
The smallest value of the variable.
Maximum
Box Plot
Max
The largest value of the variable.
Mean
Box Plot
The sum of the values divided by the count.
Median
Box Plot
The middle value. Below and above median lies an equal number of values.
Mode
Histogram
The most frequent value. There can be more than one mode.
Quantile
Box Plot
A set of 'cut points' that divide a set of data into groups containing equal numbers of values (Quartile, Quintile, Percentile, ...).
Range
Box Plot
Max-Min
The difference between maximum and minimum.
Variance
Histogram
A measure of data dispersion.
Standard Deviation
Histogram
The square root of variance.
Coefficient of Deviation
Histogram
A measure of data dispersion divided by mean.
Skewness
Histogram
A measure of symmetry or asymmetry in the distribution of data.
Kurtosis
Histogram
A measure of whether the data are peaked or flat relative to a normal distribution.
Note: There are two types of numerical variables, interval and ratio. An interval variable has values whose differences are interpretable, but it does not have a true zero. A good example is temperature in Centigrade degrees. Data on an int ...
With R, Python, Apache Spark and a plethora of other open source tools, anyone with a computer can run machine learning algorithms in a jiffy! However, without an understanding of which algorithms to choose and when to apply a particular technique, most machine learning efforts turn into trial and error experiments with conclusions like "The algorithms don't work" or "Perhaps we should get more data".
In this lecture, we will focus on the key tenets of machine learning algorithms and how to choose an algorithm for a particular purpose. Rather than just showing how to run experiments in R ,Python or Apache Spark, we will provide an intuitive introduction to machine learning with just enough mathematics and basic statistics.
We will address:
• How do you differentiate Clustering, Classification and Prediction algorithms?
• What are the key steps in running a machine learning algorithm?
• How do you choose an algorithm for a specific goal?
• Where does exploratory data analysis and feature engineering fit into the picture?
• Once you run an algorithm, how do you evaluate the performance of an algorithm?
Anomaly detection (or Outlier analysis) is the identification of items, events or observations which do not conform to an expected pattern or other items in a dataset. It is used is applications such as intrusion detection, fraud detection, fault detection and monitoring processes in various domains including energy, healthcare and finance. In this talk, we will introduce anomaly detection and discuss the various analytical and machine learning techniques used in in this field. Through a case study, we will discuss how anomaly detection techniques could be applied to energy data sets. We will also demonstrate, using R and Apache Spark, an application to help reinforce concepts in anomaly detection and best practices in analyzing and reviewing results.
2. What Defines a Data Mining Task?
• Task relevant data: where and how to retrieve the data
to be used for mining
• Background knowledge: Concept hierarchies
• Interestingness measures: informal and formal
selection techniques to be applied to the output
knowledge
• Representing input data and output knowledge: the
structures used to represent the input of the output of
the data mining techniques
• Visualization techniques: needed to best view and
document the results of the whole process
3. Task relevant data
• Database or data warehouse name: where to find the
data
• Database tables or data warehouse cubes
• Condition for data selection, relevant attributes or
dimensions and data grouping criteria: all this is used in
the SQL query to retrieve the data
4. Background knowledge: Concept hierarchies
• The concept hierarchies are induced by a partial order
over the values of a given attribute. Depending on the
type of the ordering relation, we distinguish several
types of concept hierarchies.
– Schema hierarchy - Relating concept generality. The
ordering reflects the generality of the attribute values,
Example : street < city < state < country.
– Set-grouping hierarchy - The ordering relation is the subset
relation (⊆). Applies to set values. Example: {13, ..., 39} =
young; {13, ..., 19} = teenage; {13, ..., 19} ⊆ {13, ..., 39} ⇒
teenage < young.
5. Background knowledge: Concept hierarchies
– Operation-derived hierarchy - Produced by applying an
operation (encoding, decoding, information extraction)
Example : markovz@cs.ccsu.edu
instantiates the hierarcy user−name < department < university
– Rule-based hierarchy - Using rules to define the partial
order.
Example : if antecedent consequent
11. Visualization techniques
• Visualization techniques enable us to visually identify
trends, ranges, frequency distributions, relationships,
outliers and make comparisons
• Some of the common graphs used in exploratory data
analysis and data mining are
• Frequency Polygrams and Histograms
• Scatterplots
• Box Plots
• Multiple Graphs
12. Frequency polygrams
• Frequency polygrams - Plot information according to
the number of observations reported for each value (or
ranges of values) for a particular variable (usually for
continuous variables)
• The shape of the plot reveals trends
Frequency polygram displaying a count for cars per year
13. Histograms
• Histograms provide a clear way of viewing the
frequency distribution for a single variable.
• Variables that are not continuous can also be shown as a
histogram
• The length of the bar is proportional to the size of the
group
• For continuous variables, a histogram can be very
useful in displaying the frequency distribution.
• The central values, the shape, the range of values as
well as any outliers can be identified through
Histograms
14. Various Histogram representations
Histogram showing categorical variable Diabetes
Histogram representing counts for ranges in the variable
Length
Histogram showing an outlier
15. Scatterplots
• Scatterplots can be used to identify whether any
relationship exists between two continuous variables
based on the ratio or interval scales
• The two variables are plotted on the x- and y-axes. Each
point displayed on the scatterplot is a single observation
• The position of the point is determined by the value of
the two variables.
• Scatterplots allow you to see the type of relationship
that may exist between the two variables
16. Various Scatter Plot representations
Scatterplot showing an outlier (X) Scatterplot showing a nonlinear relationship
Scatterplot showing no discernable relationship Scatterplot showing a negative relationship
17. Box Plots
• Box plots (also called box-and-whisker plots) provide a succinct
summary of the overall distribution for a variable
• Five points are displayed: the lower extreme value, the lower
quartile, the median, the upper quartile, the upper extreme and
the mean
• The values on the box plot are defined as follows:
– Lower extreme: The lowest value for the variable.
– Lower quartile: The point below which 25% of all observations fall.
– Median: The point below which 50% of all observations fall.
– Upper quartile: The point below which 75% of all observations fall.
– Upper extreme: The highest value for the variable.
– Mean: The average value for the variable.