Closed pugantsov closed 5 years ago
I've found where it breaks, it tries to call max on an array with no values in it:
2019-03-12 17:41:30,000 [MainThread ] [INFO ] Beginning model evaluation...
[[ 0]
[ 1]
[ 2]
...
[11436]
[11437]
[11438]]
[]
Traceback (most recent call last):
File "model_spotlight.py", line 542, in <module>
sim.run(defaults=True)
File "model_spotlight.py", line 534, in run
evaluation = self.evaluation(model, (train, test), (train_ids, item_ids))
File "model_spotlight.py", line 444, in evaluation
prec = sequence_precision_recall_score(model, test)
File "/home/alex/anaconda3/envs/recsys/lib/python3.6/site-packages/spotlight/evaluation.py", line 128, in sequence_precision_recall_score
predictions = -model.predict(sequences[i])
File "/home/alex/anaconda3/envs/recsys/lib/python3.6/site-packages/spotlight/sequence/implicit.py", line 303, in predict
self._check_input(sequences)
File "/home/alex/anaconda3/envs/recsys/lib/python3.6/site-packages/spotlight/sequence/implicit.py", line 179, in _check_input
item_id_max = item_ids.max()
File "/home/alex/anaconda3/envs/recsys/lib/python3.6/site-packages/numpy/core/_methods.py", line 28, in _amax
return umr_maximum(a, axis, None, out, keepdims, initial)
ValueError: zero-size array to reduction operation maximum which has no identity
Is there maybe something wrong with the formatting of the item_ids that there is a sequence where there are no item IDs?
EDIT: Found the issue, just before sequences is declared, printing test.sequences results in:
[[3200 7408 6290 ... 3379 2562 7778]
[7529 4331 3728 ... 7872 3519 6102]
[4191 1439 7711 ... 3083 8747 7610]
...
[4899 6165 2563 ... 4812 6666 4481]
[ 0 0 0 ... 4361 4407 4602]
[ 0 0 0 ... 461 4331 3279]] 702
However, the line sequences = test.sequences[:, :-k]
seems to result in an empty list. Realised this is because the default sequence length in to_sequences()
is 10 and the default k
in PR score for sequences is 10, resulting in an empty list.
I change my
Interactions
matrices toSequenceInteractions
instances during cross validation. I think this may be becauseSequenceInteractions
has noitem_ids
member?