DATA MINING IS....

"A process used by companies to turn raw data into useful information.

Get an idea...

In vitro fertilizationGiven : Embryos described by 60 features Problem : Selection of embryos that will survive Data : Historical records of embryos and outcome

Cow culling Given : Cows described by 700 featuresProblem : Selection of cows that should be culledData : Historical records and farmers’ decisions

How it works?

salary

: paid

:unpaid

Example

loan

loan

salary

: paid

:unpaidIf salary < p..then loan : unpaid

p

At a glance....

Methodology of Data Mining

SIMPLE EXAMPLE

Outlook Temperature Humidity Play

Sunny Hot High No

Sunny Hot High No

Rainy Mild High Yes

Rainy Cool Normal Yes

Overcast Cool Normal Yes

Sunny Mild High No

Rainy Mild Normal Yes

Sunny Mild Normal Yes

Overcast Hot Normal Yes

Rainy Mild High No

WEATHER DATA1.1

We can generalise the data as We can generalise the data as followsfollowsIf outlook = sunny and humidity = high then play = noIf outlook = overcastIf humidity = normal

then play = yesthen play = yesthen play = yesIf none of the above

OUTLOOK

Rainy

Yes

Outlook

Sunny

Temperature

Mild Hot

HumidityYes

Normal

Yes No

High

DECISION TREE FOR WEATHER DATA

DATAMINING IS IMPORTANT ......

"We are overwhelmed by large amount of data today.."

"Data mining make it easier to handle it !! "