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  • R vs Python for data analysis

    - by The_Cthulhu_Kid
    I have been programming for about a year and I am really interested in data analysis and machine learning. I am taking part in a couple of online courses and am reading a couple of books. Everything I am doing uses either R or Python and I am looking for suggestions on whether or not I should concentrate on one language (and if so which) or carry on with both; do they complement each other? -- I should mention that I use C# in school but am familiar with Python through self-study.

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  • how to plot scatterplot and histogram using R [migrated]

    - by Wee Wang Wang
    I have a dataset about maximum wind speed(cm) as below: Year Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec 2011 4.5 5.6 5.0 5.4 5.0 5.0 5.2 5.3 4.8 5.4 5.4 3.8 2010 4.6 5.0 5.8 5.0 5.2 4.5 4.4 4.3 4.9 5.2 5.2 4.6 2009 4.5 5.3 4.3 3.9 4.7 5.0 4.8 4.7 4.9 5.6 4.9 4.1 2008 3.8 1.9 5.6 4.7 4.7 4.3 5.9 4.9 4.9 5.6 5.2 4.4 2007 4.6 4.6 4.6 5.6 4.2 3.6 2.5 2.5 2.5 3.3 5.6 1.5 2006 4.3 4.8 5.0 5.2 4.7 4.6 3.2 3.4 3.6 3.9 5.9 4.4 2005 2.7 4.3 5.7 4.7 4.6 5.0 5.6 5.0 4.9 5.9 5.6 1.8 How to create monthly max wind speed scatterplot (month in x-axis and wind speed in y-axis) and also the monthly max wind speed histogram by using R programming?

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  • ING: Scaling Role Management and Access Certification to Thousands of Applications

    - by Tanu Sood
    Organizations deal with employee and user access certifications in different ways.  There’s collation of multiple spreadsheets, an intense two-week exercise by managers or use of access certification tools to do so across a handful of applications. But for most organizations compliance is about certifying user access for thousands of employees across hundreds of systems. Managing and auditing millions of entitlement combinations on a periodic basis poses a huge scale challenge. ING solved the compliance scale challenge using an Identity Platform approach. Join the live webcast featuring ING’s enterprise architect, Mark Robison, as he discusses how a platform approach offers value that is greater than the sum of its parts and enables ING to successfully meet their security and compliance goals. Mark will also share his implementation experiences and discuss the key requirements to manage the complexity and scale of access certification efforts at ING. Mark will be joined by Neil Gandhi, Principal Product Manager for Oracle Identity Analytics. Live WebcastING: Scaling Role Management and Access Certification to Thousands of ApplicationsWednesday, April 11th at 10 am Pacific/ 1 pm EasternRegister Today

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  • Resources for understanding iOS architecture [closed]

    - by BlackJack
    I recently finished reading Randall Hyde's excellent book Write Great Code: Volume 1: Understanding the Machine, and I have a much better knowledge of what's going on under the hood now. I want to start making iPhone apps, and there are lots of guides for that. Embracing my inner Hyde, however, I want to first learn about the iOS system architecture. Apple has a really good overview here: iOS Technology Overview Before I start, I wanted to know if there were any other good resources for understanding iOS architecture and using that knowledge for iPhone programming. Thanks.

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  • Good university for computer science with plans for game development

    - by DukeYore
    I am starting my computer science degree at a local community college in programming using C++. However, I will be transferring to a 4-year university. Does anyone have any insight on university programs? I know Cal State Fullerton has a degree with a minor in Game Development. however, is that as important as getting a degree from a really great school? If I could shoot for something like Cal Poly would that be better? Or even Stanford or SF State being so close to so many gaming companies up there in the Bay area? Thank you in advance for any guidance.

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  • Installing drivers using DPInst

    - by Sreejith S
    You can use DPInst (Driver Package Installer) to install driver files for your device on Windows Operating Systems. DPInst.exe is part of DIFx (Driver Install Framework tools) which comes along with the Windows Driver Kit (WDK). You can find DPInst redistributable inside the redist\DIFx\DPInst folder of the WDK. Using DPInst to install driver: 1)  http://msdn.microsoft.com/en-us/library/ff553601(VS.85).aspx  2) http://blogs.technet.com/svengruenitz/archive/2008/07/02/driver-installation-and-updating-made-easy-dpinst-exe.aspx How to ? 1. Copy dpinst.exe to the folder where the driver files (sys, inf, dll) reside. 2. Optionally create a dpinst.xml file which is used to configure dpinst (http://msdn.microsoft.com/en-us/library/ff550803(VS.85).aspx) If your drivers are not signed you must use the <legacyMode/> tag in dpinst.xml. 3. Run dpinst.exe to install drivers using a 'device driver update' wizard.

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  • Platform for DS/Gameboy Dev - Managed Memory, Tools, and Unit Testing

    - by ashes999
    I'm interested in dabbling in Nintendo DS, 3DS, or GBA development. I would like to know what my (legal) options for development tools and IDEs are. In particular, I would not consider moving in this direction unless I can find: A programming language that has managed memory (garbage collection) A unit testing tool akin to JUnit, NUnit, etc. for unit tests I would also prefer if other tools exist, like code-coverage, etc. for that platform. But the main thing is managed memory and unit testing. What options are out there?

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  • Advice on starting a new job

    - by Sisiutl
    In a week I will start a new job at a manufacturing company managing the development of a new eCommerce site. The company scores about a 3 on the "Joel" test. I will inherit 3 programmers who developed the company web site and do general IT programming. I have the grey hair and credentials to have their initial respect but I'm an engineer, not a manager. I'm looking for practical advise - particularly for the first 90 days - on how to establish myself, keep the team together, and move forward.

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  • What reasons are there for not using a third party version control service?

    - by Earlz
    I've recently noticed a bit of a trend for my projects as of late. I use to run my own SVN server on my VPS, but recently the nail went in the coffin for that when I got my last project migrated from my server to a Mercurial repo on Bitbucket. What are some of the ramifications to this? (disregarding the change in version control systems) It seems like there has been a huge explosion in version control hosting, and companies like Bitbucket even offer private repos for free, and Github and other such services are extremely cheap now. Also, by using them you get the benefit of their infrastructure's speed and stability. What reasons are there these days to host your own version control? The only real reason I can think of is if your source code is super top secret.

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  • The JavaOne 2012 Sunday Technical Keynote

    - by Janice J. Heiss
    At the JavaOne 2012 Sunday Technical Keynote, held at the Masonic Auditorium, Mark Reinhold, Chief Architect, Java Platform Group, stated that they were going to do things a bit differently--"rather than 20 minutes of SE, and 20 minutes of FX, and 20 minutes of EE, we're going to mix it up a little," he said. "For much of it, we're going to be showing a single application, to show off some of the great work that's been done in the last year, and how Java can scale well--from the cloud all the way down to some very small embedded devices, and how JavaFX scales right along with it."Richard Bair and Jasper Potts from the JavaFX team demonstrated a JavaOne schedule builder application with impressive navigation, animation, pop-overs, and transitions. They noted that the application runs seamlessly on either Windows or Macs, running Java 7. They then ran the same application on an Ubuntu Linux machine--"it just works," said Blair.The JavaFX duo next put the recently released JavaFX Scene Builder through its paces -- dragging and dropping various image assets to build the application's UI, then fine tuning a CSS file for the finished look and feel. Among many other new features, in the past six months, JavaFX has released support for H.264 and HTTP live streaming, "so you can get all the real media playing inside your JavaFX application," said Bair. And in their developer preview builds of JavaFX 8, they've now split the rendering thread from the UI thread, to better take advantage of multi-core architectures.Next, Brian Goetz, Java Language Architect, explored language and library features planned for Java SE 8, including Lambda expressions and better parallel libraries. These feature changes both simplify code and free-up libraries to more effectively use parallelism. "It's currently still a lot of work to convert an application from serial to parallel," noted Goetz.Reinhold had previously boasted of Java scaling down to "small embedded devices," so Blair and Potts next ran their schedule builder application on a small embedded PandaBoard system with an OMAP4 chip set. Connected to a touch screen, the embedded board ran the same JavaFX application previously seen on the desktop systems, but now running on Java SE Embedded. (The systems can be seen and tried at four of the nearby JavaOne hotels.) Bob Vandette, Java Embedded Architect, then displayed a $25 Rasberry Pi ARM-based system running Java SE Embedded, noting the even greater need for the platform independence of Java in such highly varied embedded processor spaces. Reinhold and Vandetta discussed Project Jigsaw, the planned modularization of the Java SE platform, and its deferral from the Java 8 release to Java 9. Reinhold demonstrated the promise of Jigsaw by running a modularized demo version of the earlier schedule builder application on the resource constrained Rasberry Pi system--although the demo gods were not smiling down, and the application ultimately crashed.Reinhold urged developers to become involved in the Java 8 development process--getting the weekly builds, trying out their current code, and trying out the new features:http://openjdk.java.net/projects/jdk8http://openjdk.java.net/projects/jdk8/spechttp://jdk8.java.netFrom there, Arun Gupta explored Java EE. The primary themes of Java EE 7, Gupta stated, will be greater productivity, and HTML 5 functionality (WebSocket, JSON, and HTML 5 forms). Part of the planned productivity increase of the release will come from a reduction in writing boilerplate code--through the widespread use of dependency injection in the platform, along with default data sources and default connection factories. Gupta noted the inclusion of JAX-RS in the web profile, the changes and improvements found in JMS 2.0, as well as enhancements to Java EE 7 in terms of JPA 2.1 and EJB 3.2. GlassFish 4 is the reference implementation of Java EE 7, and currently includes WebSocket, JSON, JAX-RS 2.0, JMS 2.0, and more. The final release is targeted for Q2, 2013. Looking forward to Java EE 8, Gupta explored how the platform will provide multi-tenancy for applications, modularity based on Jigsaw, and cloud architecture. Meanwhile, Project Avatar is the group's incubator project for designing an end-to-end framework for building HTML 5 applications. Santiago Pericas-Geertsen joined Gupta to demonstrate their "Angry Bids" auction/live-bid/chat application using many of the enhancements of Java EE 7, along with an Avatar HTML 5 infrastructure, and running on the GlassFish reference implementation.Finally, Gupta covered Project Easel, an advanced tooling capability in NetBeans for HTML5. John Ceccarelli, NetBeans Engineering Director, joined Gupta to demonstrate creating an HTML 5 project from within NetBeans--formatting the project for both desktop and smartphone implementations. Ceccarelli noted that NetBeans 7.3 beta will be released later this week, and will include support for creating such HTML 5 project types. Gupta directed conference attendees to: http://glassfish.org/javaone2012 for everything about Java EE and GlassFish at JavaOne 2012.

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  • Should a senior developer refuse to take paper exams during an interview?

    - by ??? Shengyuan Lu
    I found that many senior developers refuse to do paper exams in interviews. They regard the exam as a kind of humiliation, because they think that "They don't trust my programming ability even if I have five years working experience... only junior staff need take a paper exam...". However, Joel insists: 11. Do new candidates write code during their interview? Would you hire a magician without asking them to show you some magic tricks? Of course not. Is it justifiable if a senior developer refuses to take a paper exam in an interview?

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  • How important is to sacriface your free time for accomplishing goals? [closed]

    - by Darf Zon
    I was reading a book about XP programming and about agile teams. While I was reading, I saw this scenario. I've never worked with a development team (just in school). So I would like what do you opine on this situation: Your boss has asked you to deliver software in a time that can only be possible to meet the project team asking if you want to work overtime without pay. All team members have young children. Discuss whether it should accept this request from your boss or should persuade the team to give their time to the organization rather than their families. What could be significant factors in the decision? As a programmer, you are offered an upgrade as project manager, but his feeling is that you can have a more effective contribution in a technical role in one administrative. Write when you should accept that promotion. Somethimes, I sacrifice my free time for accomplishing hits at work, so it's very important to me to know your opinion base of your experience.

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  • Does md2 support skeletal meshes?

    - by jsvcycling
    I'm creating an FPS game. I'm writing my own game engine. So far all the backend stuff is going great. I'd like to support md2 as the native file format for 3D Objects, but I also want to use skeletal meshes. Does anyone know if the md2 file format supports skeletal meshes? In-case you need to know, I'm going to use blender as my Mesh creation tool and C++ as my programming language... Thanks For got to mention, the engine is based on OpenGL... Alright, for anyone who is reading this, I just found the Doom 3 md5 specifications (http://tfc.duke.free.fr/coding/md5-specs-en.html). It gives you some help on writing a parser (see bottom of link), but the example doesn't support lighting and texture mapping (the second set of example code allows for animation). Thanks @Neverender for answering my question...

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  • Which version of Java should I use for learning?

    - by Dan
    I am a QA engineer interested in mobile development and automation.I have basic programming experience (intermediate level Python, C++ programmer) and as most companies choose Java for writing frameworks I need to pickup Java. I use Ubutnu 12.04 LTS and I will be using Head First Java as learning material. When I searched for JDK options I found Oracle Java 6 and 7 and Open JDK. I read somewhere in Ubuntu forums that Java 6 is not recommended on Ubuntu systems and I am a little bit confused about which version should I use, that would be compatible with the book and the OS.

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  • How can I generate a navigation mesh for a tile grid?

    - by Roflha
    I haven't actually started programming for this one yet, but I wanted to see how I would go about doing this anyway. Say I have a grid of tiles, all of the same size, some traversable and some not. How would I go about creating a navigation mesh of polygons from this grid? My idea was to take the non-traversable tiles out and extend lines from there edges to make polygons... that's all I have got so far. Any advice?

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  • Better drivers for SiS 650/740 integrated video?

    - by Bart van Heukelom
    I installed Xubuntu 10.10 on an old box today and the graphical performance is horrid. According to lspci, the video card is this: 01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 65x/M650/740 PCI/AGP VGA Display Adapter (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device 8081 Flags: 66MHz, medium devsel, IRQ 11 BIST result: 00 Memory at f0000000 (32-bit, prefetchable) [size=128M] Memory at e7800000 (32-bit, non-prefetchable) [size=128K] I/O ports at d800 [size=128] Expansion ROM at <unassigned> [disabled] Capabilities: <access denied> Kernel modules: sisfb Is there a way to make it faster? Alternative drivers? The additional drivers tool shows nothing. I'm specifically interested in improving Java's Java2D rendering speed, because I'll be running a "stat screen" written in that language on it.

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  • How is the RIP loaded when an interrupt arrives in an IA-32e 64-bit IDT Gate Descriptor?

    - by Vern
    I need some help with the programming of an IA-32e Interrupt Descriptor as I'm pretty new to it. I don't think I quite understand how the RIP is loaded when an Interrupt arrives. There is a Segment Selector in Intel's 64-bit IDT Gate Descriptor. However, from my understanding across the 5 part Intel manuals, the Linear Address of the Interrupt Handler is loaded into RIP from the 64-bit offset specified in the IDT Gate Descriptor. The only use of the segment selector is to check: if there is a change in privilege levels the Interrupt Handler is truly pointing to a code segment My questions are: Is RIP taken from the 64-bit offset only? Or is RIP = offset(sign extended to 64-bits) + segment selector base? Is the base address pointed to by the segment selector in the IDT Gate Descriptor ignored? Or does it have a use?

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  • Approaching Java/JVM internals

    - by spinning_plate
    I've programmed in Java for about 8 years and I know the language quite well as a developer, but my goal is to deepen my knowledge of the internals. I've taken undergraduate courses in PL design, but they were very broad academic overviews (in Scheme, IIRC). Can someone suggest a route to start delving into the details? Specifically, are there particular topics (say, garbage collection) that might be more approachable or be a good starting point? Is there a decent high-level book on the internals of the JVM and the design of the Java programming language? My current approach is going to be to start with the JVM spec and research as needed.

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  • What are the files pushed to MDS?

    - by harsh.singla
    All files which are under AIAComponents will move to MDS. This contains EnterpriseObjectLibrary, EnterpriseBusinessServiceLibrary, ApplicationObjectLibrary, ApplicationBusinessServiceLibrary, B2BObjectLibrary, ExtensionServiceLibrary, and UtilityArtifacts. Also there are some common transformation (.xsl) files, which are kept under Transformations folder, moved to MDS. AIAConfigurationProperties.xml file will be there in MDS. Every cross reference (.xref) object will also be there. Every Domain value Map (.dvm) will also be there. Common fault policy, which by default included in composite during composite generation, if a user does not choose to customize fault policy. All these files are location under AIAMetaData directory and then placed in their respective folders. We are planning to put Error handling and BSR systems related data also to MDS.

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  • How to use Fixedsys in the Gnome Terminal, or wherever monospaced fonts are required

    - by Walter Tross
    I think that the Fixedsys font is one of the most readable monospaced fonts for programming. It has zero antialiasing, with vertical lines mostly 2 pixels wide. Close to ideal for current monitor dot pitches, in my eyes (literally). After years of Windows at home (for family reasons) and Linux servers at work accessed through Cygwin on Windows (for company policy reasons), with Fixedsys as the shell and IDE font, I have decided to switch to the Ubuntu desktop. Eclipse and gedit are no problem, they accept the Fixedsys Excelsior TTF font. But the Gnome Terminal only accepts monospaced fonts. Although Fixedsys Excelsior is essentially monospaced, it contains larger glyphs (mostly for eastern languages), and also some ligatures. Since apparently ALL characters must have the same width for a font to be recognized as monospaced, Fixedsys Excelsior cannot be selected in all those contexts where monospaced fonts are required, including gnome-terminal. So what is the easiest/cleanest way to use a Fixedsys clone font in contexts that only accept monospaced fonts?

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  • Who determines what is best practice? [closed]

    - by dreza
    I've often searched for answers relating to "best practice" when writing code. And I see many questions regarding what is best practice. However, I was thinking the other day. Who actually determines what this best practice is? Is it the owners or creators of the programming language. Is it the general developer community that is writing in the language and it's just a gut feeling consensus. Is it whoever seems to have the highest prestige in the developer world and shouts the loudest? Is best practice really just another term for personal opinion? I hope this is a constructive question. If I could word it better to ensure it doesn't get closed please feel free to edit, or inform me otherwise.

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  • Server Side Developer Prerequisites

    - by Jking
    I am new to server side development and am currently learning node.js. What sort of networking information should I be familiar with to allow for a smooth learning curve with server side development. Could anyone provide resources pertaining to the information required to get into server programming? To give you a better idea of my standpoint: I do not know how a server interacts with a database [Q: How does a NoSQL database, or database in general, communicate with a server?] I am unsure of how a web stack works [Q: I have heard of LAMP but do not know how Apache, MySQL, and PHP interact. Hopefully this applies to other stacks as well. How do the components of a stack work together? Also, is a MEAN stack an alternative, or is it completely irrelevant to this] I have trivial knowledge of internet protocol [however extremely inefficient][Q: What resources are beneficial when learning about networking, and how much/what knowledge should I acquire to program on the server side] I am unsure of what I am unsure of concerning networking information necessary to start development Information on how the client-server model works would be greatly appreciated

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  • What's a good, quick algorithms refresh?

    - by Casey Patton
    I have programming interviews coming up in a couple weeks. I took an algorithms class a while ago but likely forgot some key concepts. I'm looking for something like a very short book (< 100 pages) on algorithms to get back up to speed. Sorting algorithms, data structures, and any other essentials should be included. It doesn't have to be a book...just looking for a great way to get caught up in about a week. What's the best tool for a quick algorithms intro or refresher?

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  • Webcast: Introducing the New Oracle VM Blade Cluster Reference Configuration

    - by Ferhat Hatay
    The Fastest Way to Virtualize Your Datacenter Join our webcast “Best Practices for Speeding Virtual Infrastructure Deployment with Oracle VM” Tues., January 25, 2011 9 a.m. PT / 12 p.m. ET Presented by: Marc Shelley, Senior Manager, Oracle Blades Product Management Tom Lisjac, Senior Member, Oracle Technical Staff Register now for our live webcast! The Oracle VM blade cluster reference configuration addresses the key challenges associated with deploying a virtualization infrastructure. It eliminates or significantly reduces the assembly and integration of the following components BY UP TO 98%: Servers Storage Network Connections Virtualization Software Operating Systems Attend this fact-filled, how-to Webcast with Oracle experts to learn the best practices for deploying the reference configuration for Oracle VM Server for x86 and Sun Blade and Sun Fire x86 rack mount servers. Virtualization is easier than ever with this new configuration. Register now for our live webcast! For more information, see: Oracle white paper: Accelerating deployment of virtualized infrastructures with the Oracle VM blade cluster reference configuration Oracle technical white paper: Best Practices and Guidelines for Deploying the Oracle VM Blade Cluster Reference Configuration

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  • Max Degree of Parallelism Server-Side Setting

    - by Tara Kizer
    Recently I opened a case with Microsoft PSS to help us through a severe performance problem on a new system.  As part of that case, the PSS engineer checked our “max degree of parallelism” server-side setting.  It is our standard to use 4 on our production systems that have 16 CPUs (2 sockets, quad-core, hyper-threaded).  The PSS engineer had me run the below query to get Microsoft’s recommended value of “max degree of parallelism” server-side setting for our 16-CPU system: select case when cpu_count / hyperthread_ratio > 8 then 8 else cpu_count / hyperthread_ratio end as optimal_maxdop_setting from sys.dm_os_sys_info; The query returned 2.  I made the change using sp_configure, and it did not resolve our issue.  We have decided to leave it in place for now.   Do you agree with this query?  What are your thoughts on this? If you decide to change your setting to reflect the output of this query, please test it first to ensure there are no negative side effects.

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