?? c請問如何用matlab的神經網絡工具箱實現三層bp網絡？_百度知道.mht
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Date: Sun, 10 Feb 2008 23:09:09 +0800
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=B1=EA=D7=BC=BB=AF=CA=FD=BE=DD=20
<BR><BR>%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%=
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%=20
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<BR>Para.Epochs =3D 800; <BR>% =CD=F8=C2=E7=D1=B5=C1=B7=B4=FA=CA=FD =
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repmat([-1=20
1],size(Input,1),1); <BR>% =
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<BR>Para.TrainFcn =3D 'trainlm'; <BR>% =
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=CC=DD=B6=C8=CF=C2=BD=B5=BA=F3=CF=F2=B4=AB=B2=A5=B7=A8 <BR>%=20
traingda : =
=D7=D4=CA=CA=D3=A6=D1=A7=CF=B0=CB=D9=C2=CA=B5=C4=CC=DD=B6=C8=CF=C2=BD=B5=B7=
=A8 <BR>% traingdm : =
=B4=F8=B6=AF=C1=BF=B5=C4=CC=DD=B6=C8=CF=C2=BD=B5=B7=A8 <BR>% traingdx : =
<BR>%=20
=B4=F8=B6=AF=C1=BF=A3=AC=D7=D4=CA=CA=D3=A6=D1=A7=CF=B0=CB=D9=C2=CA=B5=C4=CC=
=DD=B6=C8=CF=C2=BD=B5=B7=A8 <BR>Para.LearnFcn =3D 'learngdm'; <BR>% =
=CD=F8=C2=E7=D1=A7=CF=B0=BA=AF=CA=FD=20
<BR>Para.PerformFcn =3D 'sse'; <BR>% =
=CD=F8=C2=E7=B5=C4=CE=F3=B2=EE=BA=AF=CA=FD <BR>Para.InNum =3D =
size(Input,1); <BR>%=20
=CA=E4=C8=EB=C1=BF=CE=AC=CA=FD <BR>Para.IWNum =3D =
Para.InNum*Para.Neurons(1); <BR>% =CA=E4=C8=EB=C8=A8=D6=D8=B8=F6=CA=FD =
<BR>Para.LWNum =3D=20
prod(Para.Neurons); <BR>% =B2=E3=C8=A8=D6=D8=B8=F6=CA=FD =
<BR>Para.BiasNum =3D sum(Para.Neurons); <BR>% =C6=AB=D6=C3=B8=F6=CA=FD=20
<BR>%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%=
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%=20
<BR>Net =3D newff(Para.InRange,Para.Neurons,Para.TransferFcn,...=20
<BR>Para.TrainFcn,Para.LearnFcn,Para.PerformFcn); <BR>% =
=BD=A8=C1=A2=CD=F8=C2=E7=20
<BR>%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%=
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%=20
<BR>Net.trainParam.show =3D Para.Show; <BR>% =
=D1=B5=C1=B7=CF=D4=CA=BE=BC=E4=B8=F4=B8=B3=D6=B5 <BR>Net.trainParam.goal =
=3D=20
Para.Goal; <BR>% =D1=B5=C1=B7=C4=BF=B1=EA=CE=F3=B2=EE=B8=B3=D6=B5 =
<BR>Net.trainParam.lr =3D Para.LearnRate; <BR>% =
=CD=F8=C2=E7=D1=A7=CF=B0=CB=D9=C2=CA=B8=B3=D6=B5=20
<BR>Net.trainParam.epochs =3D Para.Epochs; <BR>% =
=D1=B5=C1=B7=B4=FA=CA=FD=B8=B3=D6=B5 <BR>Net.trainParam.lr =3D=20
Para.LearnRate; <BR><BR>Net.performFcn =3D Para.PerformFcn; <BR>% =
=CE=F3=B2=EE=BA=AF=CA=FD=B8=B3=D6=B5=20
<BR>%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% <BR>% =B5=F7=CA=D4 <BR>Out1 =
=3Dsim(Net,Input); <BR>%=20
=B7=C2=D5=E6=B8=D5=BD=A8=C1=A2=B5=C4=CD=F8=C2=E7 <BR>Sse1 =
=3Dsse(Output-Out1); <BR>% =
=B8=D5=BD=A8=C1=A2=B5=C4=CD=F8=C2=E7=CE=F3=B2=EE=20
<BR><BR>%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% <BR>[Net TR] =3D =
train(Net,Input,Output);=20
<BR>% =D1=B5=C1=B7=CD=F8=C2=E7=B2=A2=B7=B5=BB=D8 =
<BR>%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% <BR>Out3 =3Dsim(Net,Input);=20
<BR>% =
=B6=D4=D1=A7=CF=B0=D1=B5=C1=B7=BA=F3=B5=C4=CD=F8=C2=E7=B7=C2=D5=E6</CA></=
DIV>
<DIV class=3Dgray style=3D"MARGIN: 5px 5px 8px" =
align=3Dright>=BB=D8=B4=F0=D5=DF=A3=BA<A=20
href=3D"http://passport.baidu.com/?business&aid=3D6&un=3D%B0%D9%C=
B%BC%CD%F8#2"=20
target=3D_blank>=B0=D9=CB=BC=CD=F8</A> -<A =
href=3D"http://www.baidu.com/search/zhidao_help.html#n5"=20
target=3D_blank> =CA=D4=D3=C3=C6=DA =D2=BB=BC=B6</A> 3-2 13:17</DIV>
<DIV =
class=3Dt2>=CC=E1=CE=CA=D5=DF=B6=D4=D3=DA=B4=F0=B0=B8=B5=C4=C6=C0=BC=DB=A3=
=BA</DIV>
<DIV class=3D"p90 pl10 f14">=B7=C7=B3=A3=B8=D0=D0=BB=A3=A1</DIV>
<DIV =
class=3Dt2>=C6=C0=BC=DB=D2=D1=BE=AD=B1=BB=B9=D8=B1=D5 &n=
bsp;<SPAN class=3D"f12 gray"=20
style=3D"FONT-WEIGHT: normal">=C4=BF=C7=B0=D3=D0 2 =
=B8=F6=C8=CB=C6=C0=BC=DB</SPAN></DIV>
<DIV class=3Dpl10>
<TABLE cellSpacing=3D0 cellPadding=3D0 border=3D0>
<TBODY>
<TR vAlign=3Dtop>
<FORM name=3Dfpj action=3Dhttp://zhidao.baidu.com/q =
method=3Dpost><INPUT=20
type=3Dhidden value=3D22 name=3Dct> <INPUT type=3Dhidden name=3Dmpn> =
<INPUT=20
type=3Dhidden value=3D100003 name=3Dcm> <INPUT type=3Dhidden =
value=3D20508177=20
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