lecture14-SVMs-handout-6-per

None verylirle quitealot ahugeamountanditsgrowing 31

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Unformatted text preview: 
problem
separable.
   Map
data
into
berer
representa)onal
space
   Common
kernels
   Linear
   Polynomial
K(x,z)
=
(1+xTz)d
   Gives
feature
conjunc)ons
   Radial
basis
func)on
(infinite
dimensional
space)
 Common categories (#train, #test)   Haven’t
been
very
useful
in
text
classifica)on
 Introduc)on to Informa)on Retrieval 20
 21
 Sec. 15.2.4 Reuters
Text
Categoriza)on
data
set
 (Reuters‐21578)
document
 •  Earn (2877, 1087) •  Acquisitions (1650, 179) •  Money-fx (538, 179) •  Grain (433, 149) •  Crude (389, 189) •  Trade (369,119) •  Interest (347, 131) •  Ship (197, 89) •  Wheat (212, 71) •  Corn (182, 56) Introduc)on to Informa)on Retrieval 22
 Sec. 15.2.4 Per
class
evalua)on
measures
   Recall:
Frac)on
of
docs
in
class
i
 classified
correctly:
 <REUTERS TOPICS="YES" LEWISSPLIT="TRAIN" CGISPLIT="TRAINING-SET" OLDID="12981" NEWID="798"> <DATE> 2-MAR-1987 16:51:43.42</DATE> <TOPICS><D>livestock</D><D>hog</D></TOPICS> <TITLE>AMERICAN PORK CONGRESS KICKS OFF TOMORROW</TITLE> <DATELINE> CHICAGO, March 2 - </DATELINE><BODY>The American Pork Congress kicks off tomorrow, March 3, in Indianapolis with 160 of the nations pork producers from 44 member states determining industry positions on a number of issues, according to the National Pork Producers Council, NPPC.   Precision:
Frac)on
of
docs
assigned
 class
i
that
are
actually
about
class
i:
 Delegates to the three day Congress will be considering 26 resolutions concerning various issues, including the future direction of farm policy and the tax law as it applies to the agriculture sector. The delegates will also debate whe...
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This document was uploaded on 02/26/2014.

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