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Write splits for sparse data into sparse arff format #376

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Write splits for sparse data into sparse arff format #376

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5 changes: 3 additions & 2 deletions amlb/datasets/openml.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@

from ..data import AM, DF, Dataset, DatasetType, Datasplit, Feature
from ..resources import config as rconfig
from ..utils import as_list, lazy_property, path_from_split, profile, split_path, unsparsify
from ..utils import as_list, is_sparse, lazy_property, path_from_split, profile, split_path, unsparsify


log = logging.getLogger(__name__)
Expand Down Expand Up @@ -248,11 +248,12 @@ def _save_split(self, df, path, name):
else 'STRING'
))
for c, dt in zip(df.columns, df.dtypes)]
data = sp.coo_matrix(df.values) if is_sparse(df) else df.values
arff.dump(dict(
description=description,
relation=name,
attributes=attributes,
data=df.values
data=data
), file)

def _is_numeric(self, col):
Expand Down