Utility functions for LSH models

ml_approx_nearest_neighbors(
  model,
  dataset,
  key,
  num_nearest_neighbors,
  dist_col = "distCol"
)

ml_approx_similarity_join(
  model,
  dataset_a,
  dataset_b,
  threshold,
  dist_col = "distCol"
)

Arguments

model

A fitted LSH model, returned by either ft_minhash_lsh() or ft_bucketed_random_projection_lsh().

dataset

The dataset to search for nearest neighbors of the key.

key

Feature vector representing the item to search for.

num_nearest_neighbors

The maximum number of nearest neighbors.

dist_col

Output column for storing the distance between each result row and the key.

dataset_a

One of the datasets to join.

dataset_b

Another dataset to join.

threshold

The threshold for the distance of row pairs.