I''m looking to write a javascript heavy clientside program with a something serverside backend that connects to the free maxima math program. I have extensive knowledge of ruby on rails, so I would prefer to call Maxima with ruby, but I don''t know if this is even possible. Its fairly easy to call Maxima (with a lisp implementation) using ANSI C, it is a little less easy to implement using JAVA with a lisp implementation like Armed Bear, but I don''t see any information about using Maxima with Ruby or Ruby on Rails. Since Maxima as far as I can tell is the number one most powerful open-source math program, and RoR is my favorite open-source web framework, it would seem like a good fit. Has anyone implemented any math heavy applications with RoR, and can you give me any advice (anyone know if RoR and maxima is possible) ?? -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Well since it probably supports command line arguments, you could always use ''system'' method On Jan 31, 5:22 am, Richard Schneeman <rails-mailing-l...@andreas- s.net> wrote:> I''m looking to write a javascript heavy clientside program with a > something serverside backend that connects to the free maxima math > program. I have extensive knowledge of ruby on rails, so I would prefer > to call Maxima with ruby, but I don''t know if this is even possible. Its > fairly easy to call Maxima (with a lisp implementation) using ANSI C, it > is a little less easy to implement using JAVA with a lisp implementation > like Armed Bear, but I don''t see any information about using Maxima with > Ruby or Ruby on Rails. > > Since Maxima as far as I can tell is the number one most powerful > open-source math program, and RoR is my favorite open-source web > framework, it would seem like a good fit. Has anyone implemented any > math heavy applications with RoR, and can you give me any advice (anyone > know if RoR and maxima is possible) ?? > -- > Posted viahttp://www.ruby-forum.com/.--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
I Read up on some of my options, found that I can run maxima as a
subprocess using:
IO.popen("maxima")
but how do I pass in arguments and get a response? After i start
"maxima" i should be able to run "1 + 1;" and return the
answer of "2"?
Also, Is popen the best way to go about running this process?
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I tried the following but i''m getting errors...am I missing something here?>> f = IO.popen("maxima")=> #<IO:0x208d5e8>>> f.puts "1+1;"IOError: not opened for writing from (irb):7:in `write'' from (irb):7:in `puts'' from (irb):7>> f.close_writeIOError: closing non-duplex IO for writing from (irb):8:in `close_write'' from (irb):8 -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Pass "w" as second argument: IO.popen("maxima",
"w")
On Feb 1, 8:52 am, Richard Schneeman <rails-mailing-l...@andreas-
s.net> wrote:> I tried the following but i''m getting errors...am I missing
something
> here?
>
> >> f = IO.popen("maxima")
> => #<IO:0x208d5e8>
> >> f.puts "1+1;"
>
> IOError: not opened for writing
> from (irb):7:in `write''
> from (irb):7:in `puts''
> from (irb):7>> f.close_write
>
> IOError: closing non-duplex IO for writing
> from (irb):8:in `close_write''
> from (irb):8
>
> --
> Posted viahttp://www.ruby-forum.com/.
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Thanks that did the trick. Do you know if there is an easy way to get the last result, or everything without having to do so many "gets"? I tried .each and readlines but with not much success. Or at least a way to determine when the last line has been "get"en without error-ing out?>> max = IO.popen("maxima", "w+")=> #<IO:0x201bccc>>> max.puts "1+1;"=> nil>> max.gets=> "Maxima 5.15.0 http://maxima.sourceforge.net\n">> max.gets=> "Using Lisp SBCL 1.0.17\n">> max.gets=> "Distributed under the GNU Public License. See the file COPYING.\n">> max.gets=> "Dedicated to the memory of William Schelter.\n">> max.gets=> "The function bug_report() provides bug reporting information.\n">> max.gets=> "(%i1) \n">> max.gets=> "(%o1) 2\n">> max.puts "1+9;"=> nil>> max.gets=> "(%i2) \n">> max.gets=> "(%o2) 10\n">> max.gets-- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
What about readlines.last? On Feb 1, 7:40 pm, Richard Schneeman <rails-mailing-l...@andreas- s.net> wrote:> Thanks that did the trick. Do you know if there is an easy way to get > the last result, or everything without having to do so many "gets"? I > tried .each and readlines but with not much success. Or at least a way > to determine when the last line has been "get"en without error-ing out? > > >> max = IO.popen("maxima", "w+") > => #<IO:0x201bccc> > >> max.puts "1+1;" > => nil > >> max.gets > > => "Maxima 5.15.0http://maxima.sourceforge.net\n">> max.gets > > => "Using Lisp SBCL 1.0.17\n">> max.gets > > => "Distributed under the GNU Public License. See the file COPYING.\n">> max.gets > > => "Dedicated to the memory of William Schelter.\n">> max.gets > > => "The function bug_report() provides bug reporting information.\n">> max.gets > => "(%i1) \n" > >> max.gets > > => "(%o1) 2\n">> max.puts "1+9;" > => nil > >> max.gets > => "(%i2) \n" > >> max.gets > > => "(%o2) 10\n" > > >> max.gets > > -- > Posted viahttp://www.ruby-forum.com/.--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
>> max = IO.popen("maxima", "w+")=> #<IO:0x2535b68>>> max.readlines.last^CIRB::Abort: abort then interrupt!! from /opt/local/lib/ruby/1.8/irb.rb:81:in `irb_abort'' from /opt/local/lib/ruby/1.8/irb.rb:243:in `signal_handle'' from /opt/local/lib/ruby/1.8/irb.rb:66:in `start'' from (irb):2:in `call'' from (irb):2:in `readlines'' from (irb):2 When you run max.readlines.anything script/console freezes -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Hm I''m not sure why does it freeze. You could try max.to_a.last or if all else fails try just skipping unnecessary lines using while loop On Feb 3, 3:36 pm, Richard Schneeman <rails-mailing-l...@andreas- s.net> wrote:> >> max = IO.popen("maxima", "w+") > => #<IO:0x2535b68> > >> max.readlines.last > > ^CIRB::Abort: abort then interrupt!! > from /opt/local/lib/ruby/1.8/irb.rb:81:in `irb_abort'' > from /opt/local/lib/ruby/1.8/irb.rb:243:in `signal_handle'' > from /opt/local/lib/ruby/1.8/irb.rb:66:in `start'' > from (irb):2:in `call'' > from (irb):2:in `readlines'' > from (irb):2 > > When you run max.readlines.anything script/console freezes > -- > Posted viahttp://www.ruby-forum.com/.--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Thanks for the help, but alas calling max.to_a results in an unrecoverable error as well. I will have to just skip unnecessary lines... -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---