Created
June 18, 2015 17:26
-
-
Save jpjacobs/6190830a08b95b0bd984 to your computer and use it in GitHub Desktop.
KNN graph
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| NB. knn graph | |
| knn =: 4 : 0 | |
| d =. (+/@:*:@:-)"1/~ y NB. distances between vectors in y | |
| n =. x ({. }.@/:)"1 d NB. get nearest neighbors (exclude self) | |
| W =. n (_"_)`(<@<@<@[)`]}"1 d NB. set all non-neighbors to _ | |
| W =. (<.|:) W NB. make symmetric | |
| ) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment