0001 0002 function [nsv,al3] = irwls_pd_svr_nobias(x,y,H,C,D,epsi,F); 0003 0004 T=clock; 0005 if (nargin<7 | nargin>7) 0006 help irwls_adapta_nobias2 0007 else 0008 0009 tol=10^-4; 0010 K=10^8; 0011 val_a=100; 0012 N=length(x); 0013 ns=-1; 0014 k=1; 0015 hacer=1; 0016 bi=0; 0017 0018 i1p=1:2:N; 0019 i1n=2:2:N; 0020 i1=[i1p i1n]; 0021 0022 epsi = epsi./F; 0023 0024 a(i1)=C*D(i1); 0025 al3=zeros(N,1); 0026 bi=0; 0027 i2p=[]; 0028 i2n=[]; 0029 e=y; 0030 0031 while(hacer) 0032 al3_a=al3; 0033 bi_a=bi; 0034 al3=zeros(N,1); 0035 al3(i2p)=C*D(i2p); 0036 al3(i2n)=-C*D(i2n); 0037 0038 if(length(i1)) 0039 0040 Xi=inv(H(i1,i1)+diag(1./(a(i1)))); 0041 E=ones(N,1); 0042 E(i1n)=-1; 0043 0044 if (length(i2n)==0) & (length(i2p)==0) 0045 aux=Xi*(y(i1)-E(i1).*epsi(i1)); 0046 elseif (length(i2n)==0) & (length(i2p)~=0) 0047 aux=Xi*(y(i1)-E(i1).*epsi(i1)-C*H(i1,i2p)*D(i2p)); 0048 elseif (length(i2n)~=0) & (length(i2p)==0) 0049 aux=Xi*(y(i1)-E(i1).*epsi(i1)+C*H(i1,i2n)*D(i2n)); 0050 else 0051 aux=Xi*(y(i1)-E(i1).*epsi(i1)+C*H(i1,i2n)*D(i2n)-C*H(i1,i2p)*D(i2p)); 0052 end; 0053 0054 al3(i1)=aux(1:length(i1)); 0055 0056 bi=0; 0057 end 0058 0059 e_a=e; 0060 0061 I=find(al3-al3_a); 0062 if(length(I)) 0063 e=e_a-H(:,I)*(al3(I)-al3_a(I)); 0064 end 0065 0066 if((max(abs(e-e_a))<tol & k>(ns+1)) | k>=2000) 0067 nsv=length(i1)+length(i2n)+length(i2p); 0068 hacer=0; 0069 else 0070 0071 i1p=find(e>epsi); 0072 i1n=find(e<-epsi); 0073 i2p=find(e>epsi & al3==C*D); 0074 i2n=find(e<-epsi & al3==-C*D); 0075 0076 a=zeros(N,1); 0077 a(i1p)=C*D(i1p)./(e(i1p)-epsi(i1p)); 0078 a(i1n)=-C*D(i1n)./(e(i1n)+epsi(i1n)); 0079 a(find(a>K))=K; 0080 0081 i2p_c=find(al3>=(C*D-C*D/100) & al3<=(C*D+C*D/100) & e>epsi & a<val_a); 0082 i2p_c=setdiff(i2p_c',i2p)'; 0083 i2p=sort([i2p' i2p_c'])'; 0084 i1p=setdiff(i1p',i2p)'; 0085 0086 i2n_c=find(al3>=(-C*D-C*D/100) & al3<=(-C*D+C*D/100) & e<-epsi & a<val_a); 0087 i2n_c=setdiff(i2n_c',i2n)'; 0088 i2n=sort([i2n' i2n_c'])'; 0089 i1n=setdiff(i1n',i2n)'; 0090 0091 i1=[i1p;i1n]; 0092 0093 if(length(i1)==0) 0094 [val,pos]=min(e(i2p)); 0095 i1p=i2p(pos); 0096 i2p=setdiff(i2p',i1p)'; 0097 a(i1p)=C*D(i1p)./(e(i1p)-epsi(i1p)); 0098 0099 [val,pos]=max(e(i2n)); 0100 i1n=i2n(pos); 0101 i2n=setdiff(i2n',i1n)'; 0102 a(i1n)=C*D(i1n)./(e(i1n)-epsi(i1n)); 0103 end 0104 0105 k=k+1; 0106 if(rem(k,20)==0 & max(abs(e-e_a))<(tol*10)) 0107 val_a=min(val_a*2,1000); 0108 end 0109 end 0110 end 0111 end