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2012-08-11 06:48:54 -0500 | answered a question | psycopg2: ImportError libgnutls on Debian wheezy and sage-5.2-Ubuntu-10.04 I downloaded source tarball I have found the following hack that now seemds to work: I will write an update if it doesn't work... fero |

2012-08-10 18:17:47 -0500 | asked a question | psycopg2: ImportError libgnutls on Debian wheezy and sage-5.2-Ubuntu-10.04 Hi all, I am deploying my Django app in sage-5.2-Ubuntu-10.04 on a Debian Wheezy. Almost all succeeds but I need python psycopg2 in sage environment and I cannot make it working. ## My problem is verified when I import psycopg2:#
# The symbol ## Follow the story on how to reproduce it First error: Following http://stackoverflow.com/questions/6329887/compiling-problems-cannot-find-crt1-o and I have done:
I cannot find out the way to get out of this problem, please help me if you can. Thank you very much Luca |

2012-08-10 18:00:31 -0500 | answered a question | notebook api: new worksheet I finally have decided to come back to the notebook interface. I proxy the notebook interface in an iframe, adjusted some css, and call some worksheet function with javascript. I have not used sagecell version 1 because I have to present the user a cell with different interpreters from the %sage one. I have not used sagecell > version 1 because I can't manage to install it. For my needings now, it's enough this implementation, spent too much time on this activity for a "proof of concept", maybe we have the opportunity to improve sagecell in some future days... |

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2012-08-10 17:48:45 -0500 | answered a question | sage 5.2 and single cell server Would you like to follow https://github.com/sagemath/sagecell/... while trying these patches? Yet not too much testing done and first time "hg" user as published now in sage-devel group. This is for sagecell version 1. |

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2012-08-06 00:19:18 -0500 | marked best answer | Math structures converters If you look at the source for the Matlab interface, you can see that it's still pretty rudimentary. In particular, doesn't reveal anything to convert it to a Matlab format. It turns out you but I don't know if that's what you want. It looks like this interface could use a lot of work. Perhaps you might contribute? Also, if you really just need an open source alternative, Octave is very good. Interestingly, there though of course one needs Octave installed and in the PATH to use it. On a tangential note, I've opened Ticket 13291 to do some minor improvement to our internal testing stuff that I found while looking at this. |

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2012-08-03 05:03:25 -0500 | answered a question | Math structures converters thx to logix in the irc channel I found a workaround to complete the circle, saved a struct to 'test.mat' file and then reload through scipy: |

2012-08-03 05:00:35 -0500 | commented answer | Math structures converters thx to logix in the irc channel I found a workaround to do this: import scipy.io mat = scipy.io.loadmat('/tmp/test.mat') print mat['test_struct'] M =matrix(mat['test_struct']) matlab("%s'" % matlab.sage2matlab_matrix_string(M)) |

2012-08-02 20:23:09 -0500 | commented answer | Math structures converters it is wonderful thank you. The thing that I still do not understand is how to revert the result to sage. In example I have a "data" variable in a data.mat file and I can do: matlab.eval("load('/tmp/data.mat')") ; x = matlab("data") ; but then I can't convert it to sage variable. I wrote x.sage(), but I get a "NotImplementedError: Unable to parse output: ??? Undefined function or variable 'sage10'" |

2012-07-25 02:09:25 -0500 | commented question | Math structures converters let's say a simple example like: a = [ 1.1, 2.000002 ; 3, 4] , is there a way to say: sage_to_matlab(a) ? Of course I have already done this by hand with the help of str(), and " ".join() but what about number precision? and what about if I have a structure? like the one presented in Matlab "help save": s1.a = 12.7; s1.b = {'abc', [4 5; 6 7]}; s1.c = 'Hello!'; ? TIA |

2012-07-21 21:59:08 -0500 | asked a question | notebook api: new worksheet Hello I am here again for a second question: I proxy connections to SAGE notebook, because I tried the API documented at http://www.sagemath.org/doc/reference/sagenb/simple/twist.html but I didn't succeed. To my needing in this stage of early development is ok to proxy connections to notebook worksheet pages, hijacking the session cookie, but I'd like to be able to create new worksheets on the fly. I know it is a bit weird, but is it feasible in your opinion? TIA Luca |

2012-07-21 21:51:01 -0500 | asked a question | Math structures converters Hi all, I am a newbie here, and I am doing some experiments with SAGE. I am trying to tie up a kind of computing framework that could import data from some kind of sources, invoke generic algorhitms, and render output data. SAGE and SAGENB are great works, thanks for developing them! I see that SAGE can operate on many backends, but I can't figure out if it can convert data from one backend to another. More explanation: I have to take care mainly of Matlab syntax in this stage, but I'd like to save data in Python or a Scipy structure after import, and then perform conversion of data basing on the computing or rendering algorithm the user choose. Is it feasible with any library you developed or you know? The "b plan" could be to use the Octave syntax which is 100% compatible. Am I right? Respect to this question there are also performance,data size grow issues and maybe other to consider. I hope this is the right place to post this question. Thank you in advance Luca |

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