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[ÇóÖú] BPÉñ¾­ÍøÂç·ÖÀà ÒÑÓÐ1È˲ÎÓë

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%¶ÁȡѵÁ·Êý¾Ý
[f1,f2,f3,f4,class] = textread('33.txt' , '%f%f%f%f%f',150)

%ÌØÕ÷Öµ¹éÒ»»¯
[input,minI,maxI] = premnmx( [f1 , f2 , f3 , f4 ]')

%¹¹ÔìÊä³ö¾ØÕó
s = length(class)
output = zeros( s , 3 )
for i = 1 : s
   output( i , class( i ) ) = 1
end

%´´½¨Éñ¾­ÍøÂç
net = newff( minmax(input) , [10 3] , { 'logsig' 'purelin' } , 'traingdx' )

%ÉèÖÃѵÁ·²ÎÊý
net.trainparam.show = 50 ;
net.trainparam.epochs = 500 ;
net.trainparam.goal = 0.01 ;
net.trainParam.lr = 0.01 ;

%¿ªÊ¼ÑµÁ·
net = train( net, input , output' ) ;

%¶ÁÈ¡²âÊÔÊý¾Ý
[t1 t2 t3 t4 c] = textread('33.txt' , '%f%f%f%f%f',150);

%²âÊÔÊý¾Ý¹éÒ»»¯
testInput = tramnmx ( [t1,t2,t3,t4]' , minI, maxI ) ;

%·ÂÕæ
Y = sim( net , testInput )

%ͳ¼ÆÊ¶±ðÕýÈ·ÂÊ
[s1 , s2] = size( Y ) ;
hitNum = 0 ;
for i = 1 : s2
    [m , Index] = max( Y( : ,  i ) ) ;
    if( Index  == c(i)   )
        hitNum = hitNum + 1 ;
    end
end
sprintf('ʶ±ðÂÊÊÇ %3.3f%%',100 * hitNum / s2 )

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