[DOC]: Example of KNN graph generation

[mbruhns]

How would you describe the priority of this documentation request

Medium

Describe the future/missing documentation

It would be great to have a few examples/tutorials on how to generate a KNN graph (e.g., for Leiden clustering) based onNearestNeighbors from cuML. These example could cover different cases of (un)directed and (un)weighted graphs.

Where have you looked?

https://docs.rapids.ai/api/cugraph/stable/

https://docs.rapids.ai/api/cugraph/nightly/

Code of Conduct

• I agree to follow cuGraph's Code of Conduct
• I have searched the open documentation issues and have found no duplicates for this bug report

[acostadon]

I will look into this and see where we can put it on our task list.

[acostadon]

@cjnolet was able to point out this example workflow.

https://github.com/NVIDIA-Genomics-Research/rapids-single-cell-examples/blob/master/notebooks/hlca_lung_cpu_analysis.ipynb

Does it help?

if you need more, let me know.

[mbruhns]

The example is for CPU, right? I am aware of the rapids-single-cell library, but I don't want to rely on its implementation of neighborhood, since I don't want to apply fuzzy_simplicial_set on my graph. I looked into the implementation of rapids-single-cell and figured out how they generate the KNN graph, maybe that code snippet could be used as one example?