Great, could you provide in comment some test cases with correct from formula or wolfram and wrong answers
сб, 29 авг. 2020 г., 22:25 Mark Andreev (Jira) <[email protected]>: > Mark Andreev created IGNITE-13392: > ------------------------------------- > > Summary: Incorrect Vector::kNorm evaluation for odd powers > Key: IGNITE-13392 > URL: https://issues.apache.org/jira/browse/IGNITE-13392 > Project: Ignite > Issue Type: Improvement > Components: ml > Reporter: Mark Andreev > Assignee: Mark Andreev > > > Current implementation of `Vector::kNorm` is incorrect. > > Current formula is > (`org.apache.ignite.ml.math.primitives.vector.AbstractVector:882`): > {code:java} > (\sum_{i}{x^p})^{1/p} > {code} > But correct formula is: > {code:java} > (\sum_{i}{|x|^p})^{1/p} > {code} > We can verify this using lectures ([ > https://www.math.usm.edu/lambers/mat610/sum10/lecture2.pdf)] or using > Wolfram Mathematica: > {code:java} > > Norm[{x, y, z}, p] > (Abs[x]^p+Abs[y]^p+Abs[z]^p)^(1/p){code} > > > > > -- > This message was sent by Atlassian Jira > (v8.3.4#803005) >
