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https://issues.apache.org/jira/browse/MAHOUT-959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13193449#comment-13193449
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Sean Owen commented on MAHOUT-959:
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No, this is wrong. The vectors are most certainly read back as they are
written. That is why there is a flag written into the 'header'. This is *not*
the same as laxPrecision.
The issue is this: when serializing / writing a vector, which in memory always
uses a double, how do you specify that it should be written as floats? that is
the one and only purpose of laxPrecision in VectorWritable. It has no role in
reading a vector. When reading a vector, the serialized form says whether the
data is 'lax' or not.
> VectorWritable does not preserve the laxPrecision flag
> ------------------------------------------------------
>
> Key: MAHOUT-959
> URL: https://issues.apache.org/jira/browse/MAHOUT-959
> Project: Mahout
> Issue Type: Bug
> Components: Math
> Affects Versions: 0.6
> Reporter: Rares Vernica
> Assignee: Sean Owen
> Attachments: MAHOUT-959.patch, VerctorWritable-laxPrecicison.patch
>
>
> When reading a vector, VectorWritable uses the laxPrecision flag to read with
> the right precision, but it does not preserve the flag in case the vector is
> written back.
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