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task 24 : why pqn is not as good as spg for mmv problem #27

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LinaMiao opened this issue Aug 15, 2012 · 2 comments
Open

task 24 : why pqn is not as good as spg for mmv problem #27

LinaMiao opened this issue Aug 15, 2012 · 2 comments

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@LinaMiao
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-- in spglineCurvy the scaling of derivative !!!!
@LinaMiao
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-- well, well, well, indeed pqn is better, just because for the very first example I tried, problem scale is too small, when the residual get near to 1e-4, spg can decrease it very fast, pqn is normal. What would be the reason?

-- for normal example scale, pqn is better, but not as obvious as for not mmv. What happened here?

@LinaMiao
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-- nope,nope, pqn got the strength again, if not bp, i.e. add noise in.
-- done

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@LinaMiao