GitHub user auonhaidar opened a pull request:
https://github.com/apache/incubator-madlib/pull/80
KNN Added
I have added implementation of K-Nearest Neighbours. The function takes
following arguments in order:
_training table name
training table's column name having vectors
training table's column name having target values(labels): assumed float
testing table name
testing table's column name having vectors
testing table's column name having row ids (used for final result's table
creation)
Operation ('c' for classification, 'r' for regression)
K_
**sample run:**
select * from
madlib.knn('training_knn','points','label','testing_knn','points','pid','c',3);
**Output gets saved in knn_final table as:**
_pid, points, predicted_target_value_
Nearest neighbours are calculated using madlib's _squared norm_ metric.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/auonhaidar/incubator-madlib master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-madlib/pull/80.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #80
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commit 23b418cf9155aa74d388d67fcec184902570869c
Author: auonhaidar <[email protected]>
Date: 2016-12-13T02:09:12Z
KNN Added
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