• Introducing the New Wolfram Screencast & Video Gallery

    Updated: 2012-08-31 23:26:34
    Did you know that we have more than 600 videos and screencasts that highlight (and help you get started with) different features of Mathematica and other Wolfram technologies? You’ve probably seen a number of them across our websites or on our YouTube channels. But now, it’s easier than ever to explore the full collection—thanks to [...]

  • Enter the Mathematica Experts Live: One-Liner Competition 2012

    Updated: 2012-08-31 23:26:34
    At the last two annual Wolfram Technology Conferences, attendees have enjoyed amazing, and being amazed by, each other in the One-Liner Competition, which challenges participants to show us the most astounding things they can do with 140 characters or less of Mathematica code. And each time we have been surprised, inspired, and gratified by their [...]

  • Friday math movie: Advancing the Digital Arts

    Updated: 2012-08-31 23:25:41
    Every time you see a computer graphic, you are looking at math in action.

  • IntMath Newsletter: No cost math books, math in art, Manga Guide review

    Updated: 2012-08-31 23:25:41
    In this Newsletter: 1. Resource: free math textbooks 2. Math in Art - Bridges 2012 3. Manga Guide to Linbear Algebra review 4. F1gur471v31y 5p34k1ng? 5. Math puzzles 5. Friday math movie 6. Final thought - a 2-letter approach to life

  • Friday math movie: A test for Parkinson's

    Updated: 2012-08-31 23:25:41
    Here's a possible test for Parkison's Disease based on math.

  • RStan: Fast, multilevel Bayesian modeling in R

    Updated: 2012-08-31 21:24:55
    For the last decade or so, the go-to software for Bayesian statisticians has been BUGS (and later the open-source incarnation, OpenBugs, or JAGS). BUGS is used for multi-level modeling: using a specialized notation, you can define random variables of various distributions, set Bayesian priors for their parameters, and create the network of relationships that describe how the random variables influence each other. To apply these models to data requires some heavy-duty number crunching: hundreds or thousands of simulations of every random variable in the model (of which there can be dozens), all in parallel. This has generally been done using...

  • Compiling rgdal on Mac OS 10.5

    Updated: 2012-08-31 20:25:12
    Why do I always forget how to do this? R CMD INSTALL rgdal --configure-args="--with-gdal-config=/Library/Frameworks/GDAL.framework/Versions/Current/unix/bin/gdal-config --with-proj-include=/Library/Frameworks/PROJ.framework/Versions/4/Headers/ --w...

  • Getting things done with large datasets: xpra separates display from computation

    Updated: 2012-08-31 20:07:19
    X11, the predominant GUI tool on UNIX and Linux machines has always allowed you to run a program on one computer and display the results on another. But standard X11 windows do not persist beyond the life of the connection. If you close the lid of your laptop, move to another location, and re-connect to [...]

  • Cluster Multiple Images with ImageJ and R

    Updated: 2012-08-31 10:14:50
    30.08.2012 With Bio7 1.6 it is possible to send multiple images from ImageJ to R without the need to open them in the Graphical User Interface of ImageJ for speed improvements. With a simple script written in Java, Groovy or BeanShell a new Bio7 API command can be used (see below) to transfer images and [...]

  • A Stan is Born

    Updated: 2012-08-31 00:30:49
    Stan 1.0.0 and RStan 1.0.0 It’s official. The Stan Development Team is happy to announce the first stable versions of Stan and RStan. What is (R)Stan? Stan is an open-source package for obtaining Bayesian inference using the No-U-Turn sampler, a variant of Hamiltonian Monte Carlo. It’s sort of like BUGS, but with a different language [...]

  • Dora Musielak – Inspired by Math #10

    Updated: 2012-08-20 05:22:57
    Note: The first minute or so of the audio is choppy but it's fine after that. About Dora Musielak Dr. Dora Musielak is a research professor, the recipient of two NASA research fellowships, and teaches science and mathematics for engineers and scientists. She is member of the American Institute of Aeronautics and Astronautics (AIAA), the [...]

  • The Julia Language hits a new speed milestone

    Updated: 2012-08-14 12:35:58
    #leftcontainerBox { float:left; position: fixed; top: 60%; left: 70px; } #leftcontainerBox .buttons { float:left; clear:both; margin:4px 4px 4px 4px; padding-bottom:2px; } #bottomcontainerBox { height: 30px; width:50%; padding-top:1px; } #bottomcontainerBox .buttons { float:left; height: 30px; margin:4px 4px 4px 4px; } I first mentioned Julia, a new language for high performance scientific computing, back in the February edition of a Month of Math software and it certainly hasn’t stood still since then.  A WalkingRandomly reader, Ohad, recently contacted me to tell me about a forum post announcing some Julia speed improvements. Julia has a set of micro-benchmarks [...]

  • Variable precision QR decomposition in MATLAB

    Updated: 2012-08-13 17:59:46
    #leftcontainerBox { float:left; position: fixed; top: 60%; left: 70px; } #leftcontainerBox .buttons { float:left; clear:both; margin:4px 4px 4px 4px; padding-bottom:2px; } #bottomcontainerBox { height: 30px; width:50%; padding-top:1px; } #bottomcontainerBox .buttons { float:left; height: 30px; margin:4px 4px 4px 4px; } Someone recently contacted me complaining that MATLAB could not do a QR factorisation of a variable precision arithmetic matrix.  Double precision matrices work fine of course: >> A=[2 1 3;-1 0 7; 0 -1 -1]; >> [Q R]=qr(A) Q = -0.8944 -0.1826 0.4082 0.4472 -0.3651 [...]

  • Making Ubuntu 12.04 useable

    Updated: 2012-08-10 11:31:38
    #leftcontainerBox { float:left; position: fixed; top: 60%; left: 70px; } #leftcontainerBox .buttons { float:left; clear:both; margin:4px 4px 4px 4px; padding-bottom:2px; } #bottomcontainerBox { height: 30px; width:50%; padding-top:1px; } #bottomcontainerBox .buttons { float:left; height: 30px; margin:4px 4px 4px 4px; } I recently installed Ubuntu 12.04 on my laptop.  I gave Unity a chance for a few days just in case it had improved since I last used it but still found it unusable.  The following tweaks made Ubuntu usable again (for me at least). Install Bumblebee – I have an NVIDIA Graphics card that makes use [...]

  • What are the best commerical non-mathworks MATLAB toolboxes?

    Updated: 2012-08-08 15:10:51
    #leftcontainerBox { float:left; position: fixed; top: 60%; left: 70px; } #leftcontainerBox .buttons { float:left; clear:both; margin:4px 4px 4px 4px; padding-bottom:2px; } #bottomcontainerBox { height: 30px; width:50%; padding-top:1px; } #bottomcontainerBox .buttons { float:left; height: 30px; margin:4px 4px 4px 4px; } The Mathworks sell dozens of toolboxes for MATLAB but they are not the only ones doing it.  Many 3rd party vendors also sell MATLAB toolboxes and many of them are of extremely high quality.  Here are some of my favourites The NAG Toolbox for MATLAB – Over 1500 high quality numerical routines from the Numerical Algorithms [...]

  • Seth Caplan & Dano Johnson – Inspired by Math #9

    Updated: 2012-08-08 04:56:29
    About the Flatland Movies The official website for Flatland the Movie is here. The Sphereland site is here. The facebook coordinates are here and their twitter link is here. About Seth Caplan - Producer Seth Caplan is an award winning filmmaker who has produced an acclaimed collection of feature films, animated movies, and documentary programs. [...]

  • A Month of Math Software – July 2012

    Updated: 2012-08-05 09:24:13
    #leftcontainerBox { float:left; position: fixed; top: 60%; left: 70px; } #leftcontainerBox .buttons { float:left; clear:both; margin:4px 4px 4px 4px; padding-bottom:2px; } #bottomcontainerBox { height: 30px; width:50%; padding-top:1px; } #bottomcontainerBox .buttons { float:left; height: 30px; margin:4px 4px 4px 4px; } Welcome to the slightly delayed July 2012 edition of A Month of Math Software where I take a look at recent events in the world of commercial and open source mathematical software. Feel free to contact me if you have news that you’d like including in next month’s edition. Mark 23 of the NAG Toolbox for [...]

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