inputs =   [-4.1 -4.0 +4.0 +4.1 +6.0 +6.1];
 targets  = [+.97 +.99 +.01 +.03 +1.0 +1.0];

 wv = -1:.1:1;
 bv = -2.5:.25:2.5;
 es = errsurf(inputs,targets,wv,bv,'tansig');
 plotes(wv,bv,es,[100 60])

 net = newff(inputs,targets,[1],{'tansig'});
 net = train(net,inputs,targets);
 outputs = net(inputs);
 errors = outputs - targets;

SSE = sse(errors)
plotep(net.IW{1,1},net.b{1},SSE);