A rare failure of an example about type conversion

[mrkn]

In my pull-request #530 the following failure is occurred and it is not related to that pull-request.

https://travis-ci.org/SciRuby/nmatrix/jobs/145353918#L3456-L3465

  1) math elementwise math functions yale #round for yale complex64 rounds complex with args
     Failure/Error: expect(@mat.round(2)).to be_within(0.0001).of(N.new [2,2], @ans.map {|a|
     TypeError:
       not sure how to convert this type of VALUE to a complex
     # ./lib/nmatrix/nmatrix.rb:243:in `cast_full'
     # ./lib/nmatrix/nmatrix.rb:243:in `cast'
     # ./lib/nmatrix/math.rb:1121:in `block (2 levels) in <class:NMatrix>'
     # ./lib/nmatrix/rspec.rb:64:in `-'
     # ./lib/nmatrix/rspec.rb:64:in `matches?'
     # ./spec/math_spec.rb:189:in `block (8 levels) in <top (required)>'

[translunar]

I'm closing this because it doesn't appear to be an issue anymore (?).

[moskyt]

unfortunately I run into this issue today. right now I am just in despair, because it is in a project I need to have done by the end of weekend – I will try to run it on a different platform and I will also try to make a MVE and post it here.

[kojix2]

@moskyt
Try Numo::NArray
https://github.com/ruby-numo/numo-narray

NMatrix maintenance has almost stopped, and Today Numo::NArray is the most popular matrix computation library in Ruby. NArray outperforms NMatrix in performance, functionality, and all aspects.

If you are interested in machine learning, great libraries available:

https://github.com/yoshoku/rumale
https://github.com/ankane/torch-rb
https://github.com/ankane/lightgbm
https://github.com/ankane/onnxruntime
https://github.com/unagiootoro/ruby-dnn

https://github.com/sonots/cumo
https://github.com/ruby-numo/numo-linalg
https://github.com/ruby-numo/numo-gsl
https://github.com/ruby-numo/numo-gnuplot

[kojix2]

NMatrix's successor project is NumRuby.
https://github.com/SciRuby/numruby

[moskyt]

@kojix2 , thanks a lot! Saved my day.
I need cholesky decomposition, so I cannot go with NumRuby (yet),
however Numo works fine. I had to load openblas manually, but otherwise it's perfect and I am glad to use a maintained library.

Thank you again!