On Mon, Mar 24, 2008 at 8:26 AM, Michael <[EMAIL PROTECTED]> wrote: > > What is the recommended way to handle Octave functions with multiple > return values in Sage?
I wrote the Sage/Octave interface, but I didn't think of everything. In particular, I completely forgot about multiple return values. The recommend way to handle them would be to implement something similar to what the Magma interface currently does, then use that. :-) This is now trac http://trac.sagemath.org/sage_trac/ticket/2696 -- William > Like Magma, Octave functions can return multiple values. Working with > such Magma functions is documented in the Sage documentation (http:// > modular.math.washington.edu/sage/doc/html/ref/node125.html), but I > cannot find similar documentation for Octave. > > Here is how it works in Octave -- foo is a function that returns two > values: > > octave:4> function [a b] = foo() a=1; b=2; endfunction > octave:5> foo() > ans = 1 > octave:6> [c,d] = foo() > c = 1 > d = 2 > > > This code transliterated into Sage is shown below. What is the > correct way to do this? > > ---------------------------------------------------------------------- > | SAGE Version 2.10.3, Release Date: 2008-03-11 | > | Type notebook() for the GUI, and license() for information. | > ---------------------------------------------------------------------- > > sage: octave.eval("function [a b] = foo() a=1; b=2; endfunction") > '' > sage: octave.foo() > 1 > sage: [c, d] = octave.foo() > --------------------------------------------------------------------------- > <type 'exceptions.NotImplementedError'> Traceback (most recent call > last) > > /home/login/<ipython console> in <module>() > > /usr/local/sage/local/lib/python2.5/site-packages/sage/interfaces/ > expect.py in __iter__(self) > 1013 > 1014 def __iter__(self): > -> 1015 for i in range(1, len(self)+1): > 1016 yield self[i] > 1017 > > /usr/local/sage/local/lib/python2.5/site-packages/sage/interfaces/ > expect.py in __len__(self) > 1017 > 1018 def __len__(self): > -> 1019 raise NotImplementedError > 1020 > 1021 def __reduce__(self): > > <type 'exceptions.NotImplementedError'>: > sage: > > > > > -- William Stein Associate Professor of Mathematics University of Washington http://wstein.org --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
