[Tioga-users] Fwd: tioga gem install and repreview

[Bill Paxton]

Hi Dave,

Thanks for the info.  I'm forwarding your message to the tioga-users  
list since it may be of wider interest.

Sorry about the Mac rubygems problem -- I'm glad you were able to  
work around it.

Concerning NArray -- we are currently going through a reworking of  
the tioga implementation prompted by Taro Sato's project to make a  
Python version.  Taro's version of tioga doesn't use Dvectors -- it  
uses the standard python analog of NArray.

So, if you're willing to help Taro get some new software working, you  
might want to give "PyTioga" a try!
Here are the links:  http://pytioga.sourceforge.net/  and http:// 
sourceforge.net/projects/pytioga

For the ruby Tioga, the NArray to Array to Dvector hack is probably  
the best work around for the short term.

Cheers,
Bill



Begin forwarded message:

> From: David MacMahon <davidm at astro.berkeley.edu>
> Date: April 23, 2008 12:12:26 AM PDT
> To: paxton at kitp.ucsb.edu
> Subject: tioga gem install and repreview
>
> Hi, Bill,
>
> I've just discovered Tioga and am looking forward to great looking  
> plots.  I installed in on my Mac using rubygems and discovered that  
> repreview did not get installed.  I think it and  
> Reload_Preview_Document.scpt are omitted from the gemfile. :- 
> (  Anyway, I got the from the tarball and all is well now. :-)
>
> One thing that would be really helpful (for me at least) would be  
> if Tioga could use NArray (http://narray.rubyforge.org/) in  
> addition to DVector.  NArray has many of the same features as  
> DVector, plus it can do complex numbers (which are a necessity for  
> my work on the radio interferometer for the Allen Telescope  
> Array).  I suspect that they are somewhat similar in nature  
> underneath (i.e. basically a pointer to a block of memory), so it  
> should, in theory, be easy to convert from one to the other without  
> too much fussing (just tricky to make sure one doesn't free the  
> memory out from underneath the other!).  Anyway, worst case is that  
> I can convert from NArray to Array and then to DVector.  Not the  
> rosiest of prospects, but at least there is a straightforward (if  
> not speedy) solution.
>
> Perhaps a better approach would be to add missing (Ruby) functions  
> to NArray so that it would be indistinguishable from DVector.  Do  
> you think that would be feasible or does Tioga depend on DVector's  
> underlying C implementation in a way that would make that approach  
> unworkable?
>
> Thanks again for Tioga!
>
> Dave
>
>

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