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[WIP] Kernelized Passive-Aggressive Algorithm for Classification #4
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Bug still occurs for news20-small.binary where the loss does not match between udtf and udtfPKI starting at sample 51, where the label switches from all -1s to all +1s. Also, news20.binary not included due to large filesize.
Note that testTime was added to see how much faster PKI is, but it appears that PKI is actually slower than normal KPA for non-sparse support vectors, since PKI must go through the work of finding all matching support vectors, which is O(number of support vectors) for a completely full match.
Also fixed tests and asserts to match correct alpha calculations.
Also changed alpha from DoubleArrayList to FloatArrayList.
Note that kernel splitting (in KernelExpansionKPA) is incomplete.
Also removed Kernel Splitting (probably uses too much memory).
…emall into JIRA-22/pr-304
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moved to #13 |
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This PR introduce the following algorithms:
This PR is based on a pending PR by @L3Sota that is sent before Hivemall entered Apache Incubator.
See JIRA for tracking the status of this issue.