Source code for bigdl.dataset.transformer

#
# Copyright 2016 The BigDL Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
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from bigdl.util.common import Sample


[docs]def normalizer(mean, std):
    """
    Normalize features by standard deviation
    """
    return lambda sample: Sample.from_ndarray((sample.features - mean) / std,
                                              sample.label, sample.bigdl_type)