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https://issues.apache.org/jira/browse/MAHOUT-1263?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Davy updated MAHOUT-1263:
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Description:
The value for Lambda in OnlineLogisticRegression seems not the be
serialised/deserialised correctly.
If I train a model with a specific lambda value, serialise it, then read it
back in, the value of Lambda goes back to the default value (1.0e-5).
I've created a patch that adds the lambda value into the write/readFields
(org.apache.hadoop.io.Writable). Patch includes a unit test that checks the
values after serialising/deserialising to/from a ByteArray.
I think this is correct, unless I'm missing something obvious?
Note: this patch is not backwards compatible - can easily adapt to be more
backwards compatible if required.
was:
The value for Lambda in OnlineLogisticRegression seems not the be
serialised/deserialised correctly.
If I train a model with a specific lambda value, serialise it, then read it
back in, the value of Lambda goes back to the default value (1.0e-5).
I've created a patch that adds the lambda value into the write/readFields
(org.apache.hadoop.io.Writable). Patch includes a unit test that checks the
values after serialising/deserialising to/from a ByteArray.
I think this is correct, unless I'm missing something obvious?
> Serialise/Deserialise Lambda value for OnlineLogisticRegression
> ----------------------------------------------------------------
>
> Key: MAHOUT-1263
> URL: https://issues.apache.org/jira/browse/MAHOUT-1263
> Project: Mahout
> Issue Type: Bug
> Components: Classification
> Affects Versions: 0.7
> Reporter: Mike Davy
> Labels: patch
> Attachments: MAHOUT-1263.patch
>
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> The value for Lambda in OnlineLogisticRegression seems not the be
> serialised/deserialised correctly.
> If I train a model with a specific lambda value, serialise it, then read it
> back in, the value of Lambda goes back to the default value (1.0e-5).
> I've created a patch that adds the lambda value into the write/readFields
> (org.apache.hadoop.io.Writable). Patch includes a unit test that checks the
> values after serialising/deserialising to/from a ByteArray.
> I think this is correct, unless I'm missing something obvious?
> Note: this patch is not backwards compatible - can easily adapt to be more
> backwards compatible if required.
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