turicreate.toolkits.distances.compute_composite_distance — Turi Create API 6.4.1 documentation (original) (raw)
turicreate.toolkits.distances. compute_composite_distance(distance, x, y)¶
Compute the value of a composite distance function on two dictionaries, typically SFrame rows.
| Parameters: | distance : list[list] A composite distance function. Composite distance functions are a weighted sum of standard distance functions, each of which applies to its own subset of features. Composite distance functions are specified as a list of distance components, each of which is itself a list containing three items: list or tuple of feature names (strings) standard distance name (string) scaling factor (int or float) x, y : dict Individual observations, typically rows of an SFrame, in dictionary form. Must include the features specified by distance. |
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| Returns: | out : float The distance between x and y, as specified by distance. |
Examples
sf = turicreate.SFrame({'X1': [0.98, 0.62, 0.11], ... 'X2': [0.69, 0.58, 0.36], ... 'species': ['cat', 'dog', 'fossa']}) ... dist_spec = [[('X1', 'X2'), 'euclidean', 2], ... [('species',), 'levenshtein', 0.4]] ... d = turicreate.distances.compute_composite_distance(dist_spec, sf[0], sf[1]) print d 1.95286120899