[SYSTEMDS-3670] Added early-stopping mechanism to tSNE #1990
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This patch improves the builtin dist function by removing the outer product operator. For 100 function calls on an arbitrary matrix with 4000 rows and 800 cols, the new dist function shortens the runtime from 66.541s to 60.268s.
ramesesz
changed the title
Baunsgaard
reviewed
Jan 28, 2024
src/test/java/org/apache/sysds/test/functions/builtin/part2/BuiltinTSNETest.java
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Hi @ramesesz - thanks for contribution. 😄 ✨ is this good for merge? |
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LGTM as well, thanks for the contribution. |
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Added a tolerance parameter to tSNE and implemented an early-stopping mechanism based on the L1 norm of the difference. Furthermore I also added a test case, whose setup guarantees that the early-stopping mechanism is triggered.
Without early-stopping, tSNE always runs 1000 iterations (based on the default parameter value). More often than not, this leads to redundant iterations, where changes are minimal. This mechanism is a good addition as it adds a dimension of flexibility to the algorithm.