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ΠΛΗ31 ΜΑΘΗΜΑ 3.7 (ΕΚΤΥΠΩΣΗ) Slide 1 ΠΛΗ31 ΜΑΘΗΜΑ 3.7 (ΕΚΤΥΠΩΣΗ) Slide 2 ΠΛΗ31 ΜΑΘΗΜΑ 3.7 (ΕΚΤΥΠΩΣΗ) Slide 3 ΠΛΗ31 ΜΑΘΗΜΑ 3.7 (ΕΚΤΥΠΩΣΗ) Slide 4
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ΠΛΗ31 ΜΑΘΗΜΑ 3.7 (ΕΚΤΥΠΩΣΗ)

  1. 1. 31 3: 3.7: WEKA ! " # $ % & !' & $ ! () # * " # +, - ) " # $ % & !' . ! ") ,! $ + , & & " ) ! / ) )' # $ " ) ! / 01& ! 2 " 3 ! ' A. 1. !" # # 1. $% &' WEKA ! ( & '# & ) )* & ! ( " * &' *#' ! ) +' )+ # ," , + ** )* & ! *#' ! ) %& - )" ) !%, -!% '& *#' ! &!" -! - " ) * ) . • $ " : ) ' ! . "! #! %&' " # " . A. 1. !" # # 2. #% " " URL #% " " : http://www.cs.waikato.ac.nz/ml/weka/ &!* # “Download” & ! &!* # % ** * (%- " “Stable Book 3rd Edition” x86 – /! 32bit )& * #!" x64 – /! 64bit )& * #!"
  2. 2. A. 2. WEKA " & + 1. ! " . ) - - ( ! 0 ) . - - ( " &*' % ! # 1 (notepad) @RELATION iris @ATTRIBUTE sepallength REAL @ATTRIBUTE sepalwidth REAL @ATTRIBUTE petallength REAL @ATTRIBUTE petalwidth REAL @ATTRIBUTE class {Iris-setosa,Iris- versicolor,Iris-virginica} @DATA 5.1,3.5,1.4,0.2,Iris-setosa 4.9,3.0,1.4,0.2,Iris-setosa 4.7,3.2,1.3,0.2,Iris-setosa ......... " . ) -! . % !" !% & ( -, 4) % ! & - - ( ) % ' (REAL, INTEGER, BOOLEAN %.*&.) " %* " " ! & . - 0 ! & ' )& . ' )& : , ' !-! . % - !" !%, % ! & ! ' %* " & ) +! !. &(% " ) . ) #! # 0 ! &' & '# ! .arff A. 2. WEKA " & + 2. %& - )" 2* #. ! %'* ) -! -!% " ") 0 ! ' % "% ) 0 ) ( ) !%' - % ) . 2. ) ( " * &' - - ( ) & 3* & ) %& !- " ) . . 0 ) " - " * . • 2 " * - - ( %& - )" & ) & * ! &' % & ' )& . ) . "! & ! " ) #! %& !- " ) - % ) . • 2 ( ! . ! plh31_lesson_3_7_train.arff • +! *'# " &! ). %& - )" # ! (" &' WEKA: • &' ( " * - - ( *(#. ) & ) . "! & ! " ) #! +! * # " ) - % ) & ) % "% ) " &' .!% - - ( . • 2 ( ! . ! plh31_lesson_3_7_test.arff • ( ! ) *#' ! ) & ) & (. ! WEKA A. 2. WEKA " & + 3. .!% ' %& - )" ) !% !% ): &!* # «Explorer» A. 2. WEKA " & + 4. &!* # . ) - ( " &!* # «Open File» % ! !# . ) %& - )" 1 2 3
  3. 3. A. 2. WEKA " & + 5. & " *#' ! ) &!" -! - " # &!* # ) *# ) &!" -! - " ) ) 1 1. &!* # ) tab “classify” 2. &!* # ) “functions” 3. &!* # ) «Multilayer Perceptron» 2 3 A. 2. WEKA " & + 5. & " *#' ! ) &!" -! - " $ *!% " & ! . & ( A. 2. WEKA " & + 5. & " *#' ! ) &!" -! - " / 1!% & !%' !" ) ) !% !% ) ($) False) )1 & & - ...: 2,3,2 (. 3 % )1 & & - 2-3-2 ) , " !. Default ! : a=( ) , _ !"'- )+ ) , _ +'- ))/2 ! " - ! % ! ! (+ - ! % 0 ! &' . %& - )" • !-! . % !" !% ! ! (!" - ! • 2. ) +'- ) '" % ! ! %* " ! ! ) %& - )" ! # ! ' %* %& - )" ( & ., %& - )" ) A. 2. WEKA " & + 5 . +! *'# " : . $) '* ) *(#. ) &!*(# ) " * - - ( *(#. ) & ) (. ) % "% ) " ! " + . !" ' arff . . 1 2 3 4 1. &!*(# ) «supplied test set» 2. &!*(# ) «Open File» 3. &!*(# ) . - - ( . 4. &!*(# ) «Open» 5. &!*(# ) «Start» 5
  4. 4. A. 2. WEKA " & + 5 . +! *'# " : . $) '* ) *(#. ) & % -!% & " & * " & (* " #! " * *(#. ): -, &' 187 & ' )& #! (* #. : 122 +! % " " 65 +! % * $ !" !% $ !. : Mean Absolute Error = &'*) "1 * : /($ " + ) Mean Absolute Error = (" &'*) $1 * = Root Mean Squared Error = $1 * / % )" = Confusion Matrix: &' 103 - # 73 +! % " 30 +! % " 4 &' 80 - # 4 35 +! % " 49 +! % " 4 A. 2. WEKA " & + 53. +! *'# " : &!% " - !# '& +! *'# " ) !% ) . . " - - ( *(#. ) ! « &!% " - !# » 1 2 1. &!*(# ) «cross- validation» 2. !" # ) &* - !# & ) . "! & ! " ) . 3. &!*(# ) «Start» A. 2. WEKA " & + 53. +! *'# " : &!% " - !# &!% " - !# (K-cross validation) ! ! -! -!% " *(#. ) '& ): • ( &' )& " * i=1,…,K: • To )& " * i ! - - ( *(#. ) • )&'* !& )& " * ! - - ( %& - )" .

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