python is a veryhighlevel language. that makes it easy to write code quickly but the program may not be as fast as a program compiled from a lowerlevel language. for this reason many scientific programs are written in fortran or c. however it has always been my experience that the majority of time on a project is spent in writing modifiying and debugging code rather th...... [Show More]
latent semantic politics or red v. blue kenyatta
michael sippey
andy baio and joshua schachter today shipped memeorandum colors a firefox extension and greasemonkey script that helps you visualize political bias of the sites linked to on memeorandum .
with the help of del.icio.us founder joshua schachter we used a recommendation algorithm to score every blog on memeorandum...... [Show More]
deaeiim Post Source: feeds.feedburner.com Posted: Sep 17 2008 17:40:45
lisans son saenaeftayken math and mona lisanaen yazarae balent atalay bizim okula gelip bir sunum yapmaetae. o sunuma ara verip ande konuurken kullandaeaeae mac da arkada ova yanelik hareketler yapmaya baladae fotoaeraf geaileri falan. dinleyicilerden ooo sesi gelmesi azerine iletim sistemi muhabbeti yaptae kaesacaek. aeletim sistemi din gibi deaeitirmek a...... [Show More]
we developed a tool for teaching support vector machines some time ago which was broken due to version changes of underlying libraries. today i adapted the demonstration tool to our new csvm library . here comes a screenshot click to enlarge it
you can check it out with svn from httppub lic.procod ers.netsv mtool . you need numpy csvm wxpython and pythoncard ...... [Show More]
beautiful code Post Source: feeds.feedburner.com Posted: Aug 16 2008 13:30:17
i dont remember who metioned this book or where they did it. i seem to remember it being mentioned by several people. but for one reason or another i decided to order it and ive eventually made my way through to it.
beautiful code is a compilation of 30something case studies each chapter written by a different contributing author describing code or systems they f...... [Show More]
the emergence of matlab during the last decade of the 20th century highly changed the way we develop implement and test numerical algorithms
in the old days we used c sometimesa fortran or c.a we spent a lot ofa time in writing lowlevel functions and debugging memory leaks. matlab helped us a lot.
debugging numerical algorithms is hard because dumping a 100 times 100 matrix will not...... [Show More]
...e httpgla dewin32.so urceforge. net
pygtk para windowsen orden
pycairo pygobject y pygtk httpwww .pygtk.org downloads .html
matplotlib en orden
numpy httpnum py.scipy.o rg
matplotlib httpmat plotlib.so urceforge. net
opcional si en algan momento sale un error que no existe msvcp71.dll descargar httpwww .dllfiles .comdllin dexdllfi les.shtml msvcp71
ejemplo en... [Show More]
nnma is a matrix decomposition and approximation method which got some attention during the last years and has many applications as in
textmining eg. toppic detection in documents. here it is a competitor to lsa
image analysis
analysis of signals like eeg or data from raman spectroscopy
sometimes nnma is called nonnegative matrix factorization nmf which is not fully c...... [Show More]
matplotlib is a
python 2d plotting library which produces publication quality figures in a variety of hardcopy formats and interactive environments across platforms. matplotlib can be used in python scripts the python and ipython shell ala matlab or mathematica web application servers and six graphical user interface toolkits.
the plots produced by maplotlib really are very p...... [Show More]
searching the web fora a python based solver for a non negative least squares problem i found some fortran code from www.netlib.org only. f2py is a great tool but due to compiler issues it did not work in my case. so i used ctypes which was easy because numpy has a sub module ctypeslib which provides some nice convenience routines for using ctypes together with numpy .
i trieda t...... [Show More]
ola
no 4a periodo do meu curso de engenharia cursei a disciplina matodos numaricos computacio nais8221 que aborda os diversos matodos computacionais usados para solucionar problemas matematicos em geral.
meu trabalho consistia em implementar um algoritmo em qualquer linguagem de programaaao que resolvesse sistemas lineares pelo matodo iterativo de jacobi.
nao entrare...... [Show More]
sociopatterns.org aims to shed light on hidden patterns in social dynamics. a case in point is the study of contact patterns which deals with such patterns in contacts among people. to date little is known about these patterns. although models can help in learning more measuring realworld dynamics is indispensable for obtaining a complete picture. however doing so manually is both laborious a...... [Show More]
python Post Source: eli.thegreenplace.net Posted: May 14 2008 16:36:36
as i wrote extensively earlier im not fully satisfied with either perl or ruby for my main programming language of choice. i always knew there is the third option python but for some reason never paid any serious attention to it.
well this is about to change ive decided to give python a try. what gave me the push was two things
i was playing with wxwidgets earlier thi...... [Show More]
regular readers of this blog will know that i have been keeping an eye on the open source mathematics package sage but have never really had time to take a closer look at it. a couple of things happened recently that made me find time to sit down and have a play with this extremely promising piece of software.
first of all i discovered that the developers of sage have been implementing a co..... [Show More]
when i started working in a bioinformatics research lab i quickly discovered the wonderful dynamic language that is perl . ive spent a couple of years with mastering perl for bioinformatics somewhere on or around my desk. perl itself was designed with textprocessing and reporting in mind so naturally its become widely used when handling biological data.
so everything bioinfor...... [Show More]
vincent noel
sage is basically a wrapper around python with tons of scientific packages added all nicely precompiled into tasty binaries just for you by very nice people which involves tons of work not as simple as it sounds. these goodies come in gzipped tarballs that you dump into your home. you can then launch the sage program which handles regular python just fine and in...... [Show More]
a while ago i was playing with music visualizations that actually corresponded to the noted being played in contrast to most of the default visualizations in music players which are just meant to look pretty. this was what i came up with before
httpwww .youtube.c omwatchv hwa2cmkw5 hc
in which the vertical axis corresponds to the frequency of the note being played and the...... [Show More]
physics simulations Post Source: feeds.feedburner.com Posted: Mar 11 2008 21:48:29
recently i started studying odes and pdes over again. i have always found this subject interesting but i havent done much with it since university besides the odd classical mechanics ode. you should expect a lot more questions about differential equations in the near future.
besides solving differential equations analytically i have been looking at numerical approaches to sol...... [Show More]
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