automated-feature-engineering
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For example, if there is a relationship transaction.session_id -> sessions.id
and we are calculating a feature transactions: sessions.SUM(transactions.value)
any rows for which there is no corresponding session should be given the default value of 0
instead of NaN
.
Of course this should not normally occur, but when it does it seems more reasonable to use the default_value
.
`DirectF
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I'm using mxnet to do some work, but there is nothing when I search the mxnet trial and example.