![]() ![]() The graphics is also not the strongest point of R, but it's a programming language with a decent help system. I used Mysql to hold, organize, reformat my data because it's much easier in SQL than in R. It is really some work getting used to it - very arcane. The programming language R can be a chore. direct database connection to all kinds of RDBMS, fancy algorithms and more. Because of it's popularity there are really loads of packages out there which you can use to do any kind of advanced analysis without programming the stuff yourself, e.g. It is becoming increasingly popular and kind of a de-facto standard for statistical analyses. Py-matplotlib python/py-matplotlib 0.72.1 matlab-like syntax for creating plots in python P5-pgplot perl/p5-pgplot 2.18 PGPlot interface for perl Xplot math/xplot 0.90.7.1 xplot was written in the late 1980s to support the analysis of TCP packet traces. Ploticus math/ploticus 2.31 plot generation program Gnuplot math/gnuplot 4.0.0 A command-driven interactive function plotting program Plotutils graphics/plotutils 2.4.1 GNU plotting utilities Pgplot graphics/pgplot 5.2.2 C/Fortran graphics library ![]() Searching for available software in DarwinPorts, I found the following packages which may be of interest: #Deltagraph mathcad igor mac os xYou will need to install the Xcode developer tools from your Mac OS X install discs before you use them, in order to install gcc and related tools.įink has been around longer, but I prefer DarwinPorts, which is cleaner and more elegant IMHO. These provide an easy way to install Mac OS X patched versions of open source software and their dependencies. Or, you can use one of two package management systems: Fink and DarwinPorts. If you want to run open source software on Mac OS X, you can either download the tarball and try to do a typical: I'd recommend creating a PostScript file directly from R if you intend to use it in a publication. I haven't used it extensively, but I have used it to create a few figures. ![]() #Deltagraph mathcad igor for mac os xIt's free and there is a native Aqua frontend for Mac OS X included in the binary distribution. I'd suggest checking out R to see if it does what you need. ![]()
0 Comments
![]() In a sign that power supplies continue to be badly strained, the California grid operator extended its stage 2 emergency notice until 9 p.m. Grid extends emergency alert for Monday evening Harvey's Donuts in Sonoma will stay closed until Friday to beat the heat. Ray's Deli and Tavern in Petaluma is closing on Tuesday "due to the extreme heat" for the safety of their staff, but hopes to reopen for regular business hours Wednesday. ![]() Murphy's Irish Pub and Restaurant in Sonoma canceled a music jam on Monday evening as temperatures peaked at 110 degrees, although it was open for drinks and food in air-conditioned rooms. Some Sonoma County eateries close amid heat The Brentwood Community Center, located at 35 Oak Street, was open as a cooling center Saturday through Tuesday from 11 am to 6 pm for those needing to escape the heat. The Brentwood Family Aquatic Complex is closed through Tuesday "due to the excessive heat forecasted on those days," the East Bay city said. East Bay pool closes because it's too hot The grid will face a fresh crisis on Tuesday when demand is forecast to be at its highest-ever level, driven by a combination of the heat wave and people returning to work (which boosts electricity demand outside the home). A Flex Alert - a request for Californians to reduce electricity use - remains in effect until 10 p.m. as demand dropped and supplies were sufficiently available - meaning rolling blackouts are extremely unlikely on Monday night. The state power grid canceled its emergency notices on Monday at 9 p.m. Latest updates: California power grid cancels emergency notice as power crisis eases - until tomorrow
![]() ![]() Without any hard data, theorists proposed many models for how massive stars might form, such as via collisions of smaller stars. But it had been impossible to confirm whether this was true for massive stars, which are eight to 100 times larger than low-mass stars. 1 issue of the Astrophysical Journal.įor almost 20 years, astronomers have known that low-mass stars form as a result of disk-mediated accretion, or from material formed from a structure rotating around a central body and driven by magnetic winds. “It is the first really ironclad confirmation that massive young stars are surrounded by orbiting accretion disks, and the first strong suggestion that these disks launch magnetically driven winds,” said University of California at Santa Cruz astronomy and astrophysics professor Mark Krumholz of the time-lapse movie, which is described in a paper published in the Jan. ![]() Massive star movie#By using the National Science Foundation’s Very Long Baseline Array (VLBA) radio telescope to take images of the wavelengths of light emitted by a massive young star located 1,350 light years away in the Orion constellation, Matthews’ team has produced a high-resolution time-lapse movie that reveals a disk rotating around the star, known as Source I (when spoken, “Source Eye”). Until now, it had been difficult to prove how massive stars form because they are rare, form very quickly and tend to be enshrouded in dense, dusty material, making it hard to observe them. Because massive stars are believed to be responsible for creating most of the chemical elements in the universe that are critical for the formation of Earth-like planets and life, understanding how they form may help unravel mysteries about the origins of life. Matthews at the MIT Haystack Observatory has discovered a disk of gas swirling close to a young massive star, which they say offers the first evidence that massive stars form similarly to smaller stars. ![]() |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |