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  • missing plot title in ggplot2

    - by Ben Mazzotta
    How can I create a plot title in ggplot2? Am I making a silly syntax error? The ggplot2 docs indicate that labs(title = 'foo') should work, but I can only get the arguments x='foo' and y='foo' to work with labs(). Neither ggtitle() nor title() worked either. Here is an example. x <- rnorm(10,10,1) y <- rnorm(10,20,2) xy.df <- data.frame(x,y) qplot(x,y, data=xy.df, geom='point', color=x*y) + labs(title = "New Plot Title", x='Some Data', y='Some Other Data')

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  • Problem with "write" function in linux

    - by Dumitru Catalin
    I am trying to write 2 server/client programs under Linux, in which they communicate through named pipes. The problem is that sometimes when I try to write from the server into a pipe that doesn't exist anymore (the client has stopped), I get a "Resource temporarily unavailable" error and the server stops completely. I understand that this is caused by using a O_NONBLOCK parameter when opening the fifo chanel, indicating the point where the program would usually wait until it could write again in the file, but is there a way to stop this behavior, and not halt the entire program if a problem occurs (shouldn't the write command return -1 ad the program continue normally)? And another strange thing is that this error only occurs when running the programs outside the ide (eclipse). If I run both programs inside eclipse, on error the write function just returns -1 and the programs continues normally.

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  • Popuplating an NSPopupButton with the contents of two NSArrayControllers

    - by ndg
    I'm looking to populate an NSPopupButton with the contents of two NSArrayControllers. The NSArrayControllers are both bound to my Core Data Managed Object Context and represent separate entities (in this example: Person and Department). Within my NSPopupButton, I would like a list of departments, and the people that work under them. Like so: Department 1 Person 1 Person 2 Department 2 Person 3 Person 4 All departments would need to be disabled by default, meaning that users should only be able to select people listed within the dropdown. I'm lost as to how I would go about doing something like this. The concept of manually populating an NSPopupButton seems fairly trivial, but I'm a bit shaky as to best to populate the element with Core Data objects. Essentially, I'm just looking for someone to point me in the right direction. I imagine there's a right way to do this, and a number of very wrong ways.

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  • J2EE: Default values for custom tag attributes

    - by Nick
    So according to Sun's J2EE documentation (http://docs.sun.com/app/docs/doc/819-3669/bnani?l=en&a=view), "If a tag attribute is not required, a tag handler should provide a default value." My question is how in the hell do I define a default value as per the documentation's description. Here's the code: <%@ attribute name="visible" required="false" type="java.lang.Boolean" %> <c:if test="${visible}"> My Tag Contents Here </c:if> Obviously, this tag won't compile because it's lacking the tag directive and the core library import. My point is that I want the "visible" property to default to TRUE. The "tag attribute is not required," so the "tag handler should provide a default value." I want to provide a default value, so what am I missing? Any help is greatly appreciated.

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  • Microsoft Access to SQL Server - synchronization

    - by David Pfeffer
    I have a client that uses a point-of-sale solution involving an Access database for its back-end storage. I am trying to provide this client with a service that involves, for SLA reasons, the need to copy parts of this Access database into tables in my own database server which runs SQL Server 2008. I need to do this on a periodic basis, probably about 5 times a day. I do have VPN connectivity to the client. Is there an easy programmatic way to do this, or an available tool? I don't want to handcraft what I assume is a relatively common task.

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  • How do I move the location of an xcodeproj file without breaking external build target?

    - by petFoo
    I have an Xcode project with a directory structure like this: MasterProjectDir/projectname.xcodeproj MasterProjectDir/ProjectSubDir/whatever.c MasterProjectDir/ProjectSubDir/etc.c MasterProjectDir/ProjectSubDir/Makefile My xcodeproj uses an external build target to point to the Makefile using these settings: Build Tool: /usr/bin/make Arguments: $(ACTION) Directory: ./ProjectSubDir For various reasons, I need to change the project directory structure to look like this: MasterProjectDir/projectname.xcodeproj MasterProjectDir/whatever.c MasterProjectDir/etc.c MasterProjectDir/Makefile I copied the .xcodeproj file into the ProjectSubDir and the project somehow still knows where to look for the files (?!?! - this is odd because their location is set as "relative to group" and I've just moved the xcodeproj file). It won't build. I get the following error: make: * No targets specified and no makefile found. Stop. Command /usr/bin/make failed with exit code 2 I could use a little help on this. There must be a setting I need to change somewhere.

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  • How to reset lstset settings for listings?

    - by drittesbinom
    At the top of my tex document, I set my sourcecode listing format by \lstset{language=java} \lstset{numbers=left, numberstyle=\tiny, numbersep=5pt, breaklines=true} \lstset{emph={square}, emphstyle=\color{red}, emph={[2]root,base}, emphstyle={[2]\color{blue}}} because I merely list Java source code. At one point in my document, I had to reformat for a single listing by \lstset{commentstyle=\footnotesize\textit} \lstset{basicstyle=\ttfamily\fontsize{11}{12}\selectfont} \lstset{literate= {!=} {$\neq$}{2}} Now I have the problem that my previous Java formatting for listings is destroyed, and I dont know how to reset the lst settings to default. How can this be avoided?

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  • What's the standard behaviour for an out parameter when a TryXxxx method returns false?

    - by Matt Lacey
    Assuming a method with the following signature bool TryXxxx(object something, out int toReturn) What is it acceptable for toReturn to be if TryXxxx returns false? In that it's infered that toReturn should never be used if TryXxxx fails does it matter? If toReturn was a nulable type, then it would make sense to return null. But int isn't nullable and I don't want to have to force it to be. If toReturn is always a certain value if TryXxxx fails we risk having the position where 2 values could be considered to indicate the same thing. I can see this leading to potential possible confusion if the 'default' value was returned as a valid response (when TryXxxx returns true). From an implementation point if view it looks like having toReturn be a[ny] value is easiest, but is there anything more important to consider?

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  • .htaccess file, IE not working Firefox, Safari & Chrome working

    - by user361284
    Hi, I've built a site in Interspire Web Publisher and it was working fine, seems to work in Firefox, Safari and Chrome but when I fired up Internet Explorer 7 & 8 only the home page works, all links to other pages show up nothing. Do you think it could have something to do with the .htaccess file? But why would it work at one point then not another? I did a test new site (its database driven) with 3 small pages and it worked fine on Internet Explorer....very weird! my website: http://www.artandepilepsy.com

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  • ColdFusion static key/value list?

    - by richardtallent
    I have a database table that is a dictionary of defined terms -- key, value. I want to load the dictionary in the application scope from the database, and keep it there for performance (it doesn't change). I gather this is probably some sort of "struct," but I'm extremely new to ColdFusion (helping out another team). Then, I'd like to do some simple string replacement on some strings being output to the browser, looping through the defined terms and replacing the terms with some HTML to define the terms (a hover or a link, details to be worked out later, not important). Can anyone point me in the right direction of: How to define the stucture (if that is what I need for a key/value pair list) How to query at the application start-up and reuse the list properly The best way to do the string replacement

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  • NullPointerException Java help

    - by KP65
    Hello guys. I've been tearing my hair out the past few hours trying to solve this problem. Every time I click on a JButton which should open a JFrame(And it does), i get a stacktrace saying I have a null point exception at these bits of code: In class A i have: aButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { B instanceofB = new B(userSession.getBalance()); }); and Class B super.getSomeBtn().setVisible(false); This is where the stacktrace says the errors are in the two above sections. I have a line exactly the same as the one above in Class B and it works fine? Really stuck here!

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  • Validating Internationalized URLs - Is this going to be a problem?

    - by VirtuosiMedia
    After reading about the new Arabic URLs, and with more languages to come, how should URL validation be done for internationalized applications? Does the validation change at all and will existing solutions break? Is regex still a good approach? If so, what would that regex look like? If not, what's a good strategy? What are some good resources to read more on the topic? I ask this because it has the potential to cause a good many localized applications to have to be rewritten if they have to validate URLs at any point.

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  • Detect whether certain IIS features are present from InstallScript

    - by Christian Hayter
    I have an InstallScript project written in InstallShield 2010, which, amongst other things, shells out to several .NET MSI installers that install web apps. If any of these web apps are selected for installation by the end user, I need to check for the following optional IIS features from InstallScript code before allowing the install to proceed: ASP.NET (IIS 6+) WCF HTTP Activation (IIS 7+) IIS Metabase and IIS 6 configuration compatibility (IIS 7+) Can anyone point me in the right direction please? Ideally I'm looking for registry values that I can check directly from InstallScript code, but I guess some kind of WMI or COM check would be OK as well. PS: In case it's relevant, we need to support all versions of IIS from 5.1 onwards at this time. If 5.1 support is a problem, we may consider dropping it if we have to.

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  • Java not working on MacOS X Leopard

    - by eeeeaaii
    I'm running Leopard, xcode 3.1.3. When I type "java" at the command line I get this: dyld: could not load inserted library: /usr/lib/libSaturnFE.dylib Trace/BPT trap What did I do? I did do some profiling with Saturn a while back but I didn't know it was going to screw up my machine. I'm fairly sure it worked when I first installed xcode. I guess I could install a different Java SDK than the one that came with Xcode? I can't find an upgrade path for Xcode that doesn't require me to upgrade to Snow Leopard. I just don't feel like upgrading to Snow Leopard right now because I don't have good disk backups in place. edit: at least if anybody could point me to a resource or even a Mac forum where I could ask this question it would be really helpful.

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  • Programatically WPF Fade In (via extension methods)

    - by Dinis Cruz
    I'm trying to write a simple (stand alone) C# extension method to do a Fade-In of a generic WPF UIElement, but the solutions (and code samples) that I found all contain a large number of moving parts (like setting up a story, etc...) For reference here is an example of the type of API method I would like to create. This code will rotate an UIElement according to the values provided (fromValue, toValue, duration and loop) public static T rotate<T>(this T uiElement, double fromValue, double toValue, int durationInSeconds, bool loopAnimation) where T : UIElement { return (T)uiElement.wpfInvoke( ()=>{ DoubleAnimation doubleAnimation = new DoubleAnimation(fromValue, toValue, new Duration(TimeSpan.FromSeconds(durationInSeconds))); RotateTransform rotateTransform = new RotateTransform(); uiElement.RenderTransform = rotateTransform; uiElement.RenderTransformOrigin = new System.Windows.Point(0.5, 0.5); if (loopAnimation) doubleAnimation.RepeatBehavior = RepeatBehavior.Forever; rotateTransform.BeginAnimation(RotateTransform.AngleProperty, doubleAnimation); return uiElement; }); }

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  • Resources/Teaching ideas to teach computers to kids

    - by Shravan
    A small initiative from my work place plans to teach very basic computers to not so fortunate kids. I was looking for some very basic topics/resources. These kids are very young and have not seen/worked with a computer before. The fun factor should not be lost and hence I don't want it to be rigorous, just plain, what is computer, keyboard, mouse, browser, where to look for what (google.com) and so on. Has any-one done this sort of thing before, if yes, could you point me to some resources.

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  • ActionScript 2.0 problem with the object's _visible parameter

    - by GMan
    Hey guys, I've been trying to build something simple in Flash 8, and I stumbled across something weird I cannot explain: I have an object, and at some point of the program, I want it to be visible (it is invisible at first), so I write: _root.myObj._visible = true; _root.gameOver.swapDepths(_root.getNextHighestDepth()); //so it will be on the top and this works fine, the object becomes visible and etc. What I planned to happen next is that the user presses a button on that same object, and the object will go invisible: on(release) { trace(_root.myObj._visible); _root.myObj._visible = false; trace(_root.myObj._visible); _root.gotoAndPlay("three"); } The trace returns at first true and later on false, so the command works, but oddly the object stays visible, that's what I don't understand. Thanks everybody in advance.

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  • Dealing with passwords securely

    - by Krt_Malta
    Hi I have a Java web service and a Java web client making use of this service. One of the functions is to create a new user account. My two concerns are: How will I send the user's password securely from the client. How will I store the user's password securely on the server. How can I achieve these? I know the theory basically behind security, security algorithms etc but can anyone give me some advice on how I should go about in coding? Could anyone point me to some good (and if possible not complicated) examples to follow since I found some examples on the Internet very contorted? Thanks a lot and regards, Krt_Malta

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  • How useful is a 'pure' MVC implementation?

    - by Matt1776
    I work at a company that provides custom made 'CRM'-like software. We are currently redesigning/redeveloping the software with the hopes that it will look more modern and be easier to develop and customize for future clients. Currently it takes a long time to customize each new application. There is a presumption that the reason it takes so long is because of the amount of business logic that is present in the 'view' layer. To some extent I can vouch for this being true, but symptoms don't always reliably point out a cause. There was a suggestion that if we just move the business logic to the controller layer and use pure view (we use java J2EE and struts) as in implementing struts tags instead of calling the bean layer and iterating objects right on the jsp - etc etc. Before I start advocating we go forward with this, I wanted to get a feeling for what other people thought. Does a "pure" implementation of the MVC (especially emphasis on decoupling the controller and the view) provide a cleaner, easier to develop and change code base?

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  • Which is better: string html generation or jquery DOM element creation?

    - by Ed Woodcock
    Ok, I'm rewriting some vanilla JS functions in my current project, and I'm at a point where there's a lot of HTML being generated for tooltips etc. My question is, is it better/preferred to do this: var html = '<div><span>Some More Stuff</span></div>'; if (someCondition) { html += '<div>Some Conditional Content</div>'; } $('#parent').append(html); OR var html = $('<div/>').append($('<span/>').append('Some More Stuff')); if (someCondition) { html.append($('<div/>').append('Some conditionalContent'); } $('#parent').append(html); ?

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  • How can two threads access a common array of buffers with minimal blocking ? (c#)

    - by Jelly Amma
    Hello, I'm working on an image processing application where I have two threads on top of my main thread: 1 - CameraThread that captures images from the webcam and writes them into a buffer 2 - ImageProcessingThread that takes the latest image from that buffer for filtering. The reason why this is multithreaded is because speed is critical and I need to have CameraThread to keep grabbing pictures and making the latest capture ready to pick up by ImageProcessingThread while it's still processing the previous image. My problem is about finding a fast and thread-safe way to access that common buffer and I've figured that, ideally, it should be a triple buffer (image[3]) so that if ImageProcessingThread is slow, then CameraThread can keep on writing on the two other images and vice versa. What sort of locking mechanism would be the most appropriate for this to be thread-safe ? I looked at the lock statement but it seems like it would make a thread block-waiting for another one to be finished and that would be against the point of triple buffering. Thanks in advance for any idea or advice. J.

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  • jQuery Address Plugin - Not allowing loading ajax?

    - by Nic Hubbard
    I am trying to test the jQuery Address Plugin and it seems to not allow ajax to work in the change function. I am using: $.address.change(function(event) { $('#content').load(event.value+' #content'); $.address.title(event.value); }); $('a').click(function() { $.address.value($(this).attr('href')); }); While I can use event.value for other things, it just does not seem to let the .load() function work. Even trying a static URL in .load() does nothing. Is something in the plugin preventing this? I thought this was the point of the plugin!

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  • Creating a loading screen in HTML5

    - by espais
    I am having some issues finding a decent tutorial for generating a loading style screen with regards to HTML5. To be quite honest I'm not sure exactly where to begin... My project is essentially a simple HTML5 game, where I'll be loading in various sprite sheets and tilesets. They'll be reasonably small, but I'd like to show a little loading spinner instead of a blank screen while all the resources are loaded. Much appreciated if somebody could point me in the right direction, be it decent links or code samples to get me going...my Google-fu is lacking today! For clarification, I need to figure out how to load the resources themselves, as opposed to finding a spinner. For instance, how to calculate that X% has loaded.

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  • htaccess rewriterule

    - by user322731
    I currently have this rule where I want the page to just render my static content. RewriteRule ^videos\/coverage\/view\/236159\-([0-9a-zA-Z-]+) http: //website.com/static/236159.html [NC] However, this doesn't work. It works with a L tag but then the URL is different: RewriteRule ^videos\/coverage\/view\/236159\-([0-9a-zA-Z-]+) http: //website.com/static/236159.html [L, NC] My goal is to keep the URL the same but the content different. Can anyone point out to what flags are needed in order to get this working properly? Thanks!

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  • Is it a good idea to work on header files only, just at the start of the project?

    - by m4design
    To explain my point further, I'm a beginner in programming, and I'm working on a small project. Instead of separating the .cpp file from the header file, I'm implementing the code in the header files, and making one .cpp file for testing. I do this to have less files, hence easier navigation. Then later I'll separate the code as it should be. Will this cause any problems? should I continue doing that? Thanks.

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