indDW_gt_0 = find(productDW > 0);
indDB_gt_0 = find(productDB > 0);
indDW_lt_0 = find(productDW < 0);
indDB_lt_0 = find(productDB < 0);
indDW_eq_0 = find(productDW == 0);
indDB_eq_0 = find(productDB == 0);

net.deltaMarginW{i}(indDW_gt_0) = min(ETA_PLUS.*net.deltaMarginW{i}(indDW_gt_0), 50);
net.deltaMarginB{i}(indDB_gt_0) = min(ETA_PLUS.*net.deltaMarginB{i}(indDB_gt_0), 50);

   net.deltaMarginW{i}(indDW_lt_0) = max(ETA_MINUS.*net.deltaMarginW{i}(indDW_lt_0), exp(-6));
net.deltaMarginB{i}(indDB_lt_0) = max(ETA_MINUS.*net.deltaMarginB{i}(indDB_lt_0), exp(-6));

    net.W{i}(indDW_gt_0) = net.W{i}(indDW_gt_0)-(sign(DW{i}(indDW_gt_0).*net.deltaMarginW{i}(indDW_gt_0)));
net.B{i}(indDB_gt_0) = net.B{i}(indDB_gt_0)-(sign(DB{i}(indDB_gt_0).*net.deltaMarginB{i}(indDB_gt_0)));

  DW{i}(indDW_lt_0) = 0;
DB{i}(indDB_lt_0) = 0;

     net.W{i}(indDW_eq_0) = net.W{i}(indDW_eq_0)-(sign(DW{i}(indDW_eq_0).*net.deltaMarginW{i}(indDW_eq_0)));
net.B{i}(indDB_eq_0) = net.B{i}(indDB_eq_0)-(sign(DB{i}(indDB_eq_0).*net.deltaMarginB{i}(indDB_eq_0)));

Totale nella Rete Neurale.
net.DW{i} = DW{i};
net.DB{i} = DB{i};