check for NaN on distances, make it Inf

GetDistances.m

@@ -55,10 +55,12 @@ for i=1:length(words)
 
     d1(i)=(NWD1x(i)-NWD1(i));
     d2(i)=(NWD2x(i)-NWD2(i));
+    if isnan(d1(i)) % f(X)=0 --> -log2(0)==Inf , Inf-Inf=NaN
+        d1(i)=Inf;
+    end
     if isnan(d2(i)) % f(X)=0 --> -log2(0)==Inf 
         d2(i)=Inf;
     end
-    
     if d1(i)<d2(i)
 %     if abs(d1(i))<abs(d2(i)) % magnitude?
         fprintf('1,');