the confusion is because when we specify --sgd in vw command line, it runs classic sgd, without adaptive, normalised and invariant updates. So, when we specify algorithm as sgd in vw-hyperopt, does it run as classic or with special updates? Is it mandatory to specify algorithm in vw-hyperopt? Which is the default algorithm? Thank you.
When we specify "--algorithms=sgd" in vw-hyperopt, does it run with adaptive, normalised and invariant updates?
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Looking at the source code confirms that the meaning of
--algorithm sgdhere simply leaves the default alone.This is different than
vw --sgd. It doesn't disable the defaults by passing--sgdtovw. IOW: yes, the adaptive, normalized and invariant updates will still be in effect.Also: you can verify this further by looking at the log file created by
vw-hyperoptin the current dir and verify it has no--sgdoption in it. This log includes the fullvwcommand line it executes for training and testing, e.g: