Temperature Wind Strong Strong None None Cold Cold 0.75 Warm Hot In the above data-set the Information gain for the attribute Sunshine: Note: Information gain formula for a variable A in a set S is: IG(S,A) = E(S) -vvalues(A) |SV|/|S| *E(SV) 1 0 0.5 Sunshine Cloudy Cloudy Sunny Sunny 0 Go out No No Yes Yes

Temperature Wind Strong Strong None None Cold Cold 0.75 Warm Hot In the above data-set the Information gain for the attribute Sunshine: Note: Information gain formula for a variable A in a set S is: IG(S,A) = E(S) -vvalues(A) |SV|/|S| *E(SV) 1 0 0.5 Sunshine Cloudy Cloudy Sunny Sunny 0 Go out No No Yes Yes

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Use of XOR function

XOR function or exclusive OR function was introduced in Excel 2013. This function is available under excel logical functions. For the given statement, the XOR function will return true only when either of the statements is true. It returns false when both the statements are true or when both the statements are false.

Question

Temperature Wind
Strong
Strong
None
None
0.75
Cold
Cold
Warm
Hot
In the above data-set the Information gain for the attribute Sunshine:
Note: Information gain formula for a variable A in a set S is:
IG(S,A) = E(S)-values(A)
values(A) SV/ISI *E(Sv)
1
0.5
Sunshine
Cloudy
Cloudy
Sunny
Sunny
0
Go out
No
No
Yes
Yes

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