/home/oo/.gem/ruby/gems/classifier-reborn-2.2.0/lib/classifier-reborn/lsi.rb:313:in sort': comparison of Float with NaN failed (ArgumentError) from /home/oo/.gem/ruby/gems/classifier-reborn-2.2.0/lib/classifier-reborn/lsi.rb:313:inbuild_reduced_matrix'
from /home/oo/.gem/ruby/gems/classifier-reborn-2.2.0/lib/classifier-reborn/lsi.rb:143:in build_index' from /home/oo/.gem/ruby/gems/classifier-reborn-2.2.0/lib/classifier-reborn/lsi.rb:77:inadd_item'
/home/oo/.gem/ruby/gems/classifier-reborn-2.2.0/lib/classifier-reborn/lsi.rb:313:in
sort': comparison of Float with NaN failed (ArgumentError) from /home/oo/.gem/ruby/gems/classifier-reborn-2.2.0/lib/classifier-reborn/lsi.rb:313:in
build_reduced_matrix' from /home/oo/.gem/ruby/gems/classifier-reborn-2.2.0/lib/classifier-reborn/lsi.rb:143:inbuild_index' from /home/oo/.gem/ruby/gems/classifier-reborn-2.2.0/lib/classifier-reborn/lsi.rb:77:in
add_item'