Range Search and Subset Search Examples in C++

[Christopher-06]

Hello together,
I have gone through the entire documentation and wiki pages of FAISS and learned about the Range Search (link) and Subset Searching (link) features. But now I wonder how to use them in C++, because the descriptions there are not very clearly formulated. Can someone show me how to perform the following:

1. create IVFPQ index with data points and custom IDs
2. do a KNN search
   --- I was able to. Now the part I can't get done: ---
3. search the index with range_search and an arbitrary radius
4. search the index (knn), but include only certain IDs (with the IDSelector)

It would really be a big help if someone could show me code snippets about how to do it - thanks!

[Christopher-06]

For anyone having the same problem, this guy helped me and provided a solution: https://stackoverflow.com/questions/74432548/c-faiss-how-to-search-in-subsets/76493512#76493512