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- clear off
- nntwarn off
- format compact
- P=-1:.1:-.5;
- T=[-.9602, -.5770, -.0729, .3771, .6405, .6600];
- [R,Q]=size(P);
- S1=13;
- S2=7;
- [S3,Q]=size(T);
- [W1,B1]=nwtan(S1,R);
- [W2,B2]=nwtan(S2,S1);
- [W3,B3]=rands(S3,S2);
- disp_freq=100;
- max_epoch=20000;
- err_goal=0.01;
- lr=0.01;
- error=[];
- A1=tansig(W1*P,B1);
- A2=tansig(W2*A1,B2);
- A3=purelin(W3*A2,B3);
- E=T-A3;
- SSE=sumsqr(E);
- for epoch=1:max_epoch
- if SSE<err_goal
- epoch=epoch-1;
- break
- end
- D3=deltalin(A3,E);
- D2=deltatan(A2,D3,W3);
- D1=deltatan(A1,D2,W2);
- [dW1,dB1]=learnbp(P,D1,lr);
- [dW2,dB2]=learnbp(A1,D2,lr);
- [dW3,dB3]=learnbp(A2,D3,lr);
- W1=W1+dW1; B1=B1+dB1;
- W2=W2+dW2; B2=B2+dB2;
- W3=W3+dW3; B3=B3+dB3;
- A1=tansig(W1*P,B1);
- A2=tansig(W2*A1,B2);
- A3=purelin(W3*A2,B3);
- E=T-A3;
- SSE=sumsqr(E);
- error=[error SSE];
- if(rem(epoch,disp_freq)==0)
- epoch
- SSE
- plot(P,T,'r',P,A3,'g')
- pause(1e-50)
- end
- end
- epoch
- SSE
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