Hi guys,

I have an iterative workflow where a distance matrix is calculated using the *Distance Matrix Calculate* node. At each new iteration there are only few new data points, because most of them came from older iterations. **Is there a way to avoid re-calculating all the distances of the old points at each iteration?**

**I can save the distance matrix but then I don’t know how to extend it with the new data points**, calculating only the distances between the new data points and the old ones (and of course between the new data points themselves). I think to a sort of “distance matrix extension/concatenation”. **Is this possible?**

Thanks in advance for any hint.