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  1. Re: Information about Linux / Ubuntu / Android use in schools

    hi,
    I hope that this is not too late yet, but I attend to the university of Minnessota and there is a computer lab I pass by every day, and they run Ubuntu 12.04, in fact they have several labs...
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    Re: Auctex -- parse on save not working

    the way I deal whit that kind of things is completely different. Any time I install emacs, I install auctex and reftex at the same time. reftex handles all the labels and cross-references and it does...
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    Re: MATLAB R2010a Launcher problem.

    did you guys try starting matlab from the command line? usually the matlab installer aks during the installation if you want to add a symbolic link to /usr/bin which is all what you need in order to...
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    Re: Software for Creation of Academic Posters

    from what I have read in the previous posts, I think that the best option is Inkscape. Don't forget that in case that you have to include some math in your poster, you can typeset everything directly...
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    Re: Canonical & Banshee Agree to Disagree

    I agree with you, but I think that the analogy is accurate. without the chassis, the thing wouldn't run, but If it not were for the far better user experience and attention to details, Ubuntu...
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    Re: Canonical & Banshee Agree to Disagree

    sure, canonical takes something like this, and gives to the users something like this, which they would even ship for free to people all over the world. I wonder why Ubuntu is so popular. I only hope...
  7. Re: Which language is better for scientific computing?

    I decided to learn a bit of C++ and now, I definitely and absolutely prefer fortran 90. check the following fortran 90 code for matrix times vector multiplication and compare it to the equivalent C++...
  8. Poll: Re: Preparing presentation with Latex and Animation

    you can actually embed a movie in a beamer presentation. the code for doing that is below

    \usepackage{multimedia}
    \begin{document}
    \movie[width=6cm, height=6cm, poster]{}{animation.avi}

    now,...
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    Re: Problem with Matlab in Ubuntu

    did you try using the menu file>save path?
    I'm not sure that I really understand what is your problem.
  10. Re: Which language is better for scientific computing?

    yes indeed. as I stated in a previous post I learned about the "parallel universe" of programming with MPI. however MPI is much harder to use than openMP. and from what I've been reading you only...
  11. Re: Which language is better for scientific computing?

    that sounds interesting. meanwhile I'm investing some time in learning openMP. I'm really surprised about how easily you can paralellize a code for using it with a multicore machine. considering how...
  12. Re: Which language is better for scientific computing?

    I thought that you and I agreed with respect to the parallelization capabilities of both languages:

    ssam was arguing about C being better than fortran in this respect (parallelization), basing his...
  13. Re: Which language is better for scientific computing?

    I don't see why that wouldn't be possible with fortran. also, using gotos etc seems a bit like using outdated bad programming practices to me.
    gotos were common with the fortran 77 standard, but...
  14. Re: Which language is better for scientific computing?

    here is the change you did, but in fortran version:

    program test
    integer :: i,j,k,n
    real*8 :: x
    n=10000
    !$OMP PARALLEL do
    do i=1,n
    do j =1,n
    do k=1,n
  15. Re: Which language is better for scientific computing?

    I think that this comment summarizes what I have learned in this thread and answers my original question. thanks
  16. Re: Which language is better for scientific computing?

    the execution times below


    fortran
    7:54:38.40 (7 hours 54 minutes 38.4 seconds)
    C
    7:54:06.71 (7 hours 54 minutes 6.7 seconds)

    were obtained when compiled as shown here
  17. Re: Which language is better for scientific computing?

    definitely!. no doubt about that

    now, that is a very interesting question. I have little knowledge about parallelization. I have used the MPI library before, and as far as I know, its use is...
  18. Re: Which language is better for scientific computing?

    this is chinese to me :D, I'm not really a programmer. If matlab were as fast as fortran or C, I wouldn't bother using anything else.

    I regularly used that flag, until a couple of years ago, when...
  19. Re: Which language is better for scientific computing?

    using those flags (-msse2 -mfpmath=sse) increased the execution time for both C and Fortran executables, and also made them run in similar times. I'll look into that and post the best results with a...
  20. Re: Which language is better for scientific computing?

    ftfy ;)
  21. Re: Which language is better for scientific computing?

    great!! that's really good stuff. I'm running two executables compiled with those tags right now, and I'll post the results tomorrow. Also, given that computing the square root has been source of...
  22. Re: Which language is better for scientific computing?

    below is a summary of the execution times for all the test I have run until now:


    fortran (no optimization)
    4:46:48.45 (4 hours, 46 min, 48 seconds)
    fortran (full optimization)
    4:18:08.29 ...
  23. Re: Which language is better for scientific computing?

    yes! I agree. a comparison like that is what I would really like to see.

    this is a very sophisticated question actually. I use vectorial operations in fortran all the time but as I stated...
  24. Re: Which language is better for scientific computing?

    my apologies for my C-C++ ignorance, and thanks for the info. If you read the original post carefully, you will notice that times for 2 fortran executables were reported, one compiled with full...
  25. Re: Which language is better for scientific computing?

    I completely agree with you. I would only recommend fortran to anybody interested in scientific computing, who wants to do some heavy computations. In my case, I use matlab for manipulating and...
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