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• Touch Event Not Work With PinchZoom

  - by Siddharth

  I was implemented pinch zoom functionality for my tower of defense game. I manage different entity to display all the towers. From that entity game player select the tower and drag to the actual position where he want to plot the tower. I set the entity in HUD also, so user scroll and zoom the region, the tower become visible all the time. Basically I have created the different entity to show and hide towers only so I can manage it easily. My problem is when I have not perform the scroll and zoom the tower touch and the dragging easily done but when I zoom and scroll the scene at that time the tower touch event does not call so the player can not able to drag and drop it to actual position. So anybody please help me to come out of it.

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• Ouverture d'un espace pour vos applications mobiles : faites découvrir vos applications aux 220.000 professionnels de notre communauté

  Ouverture d'un espace pour vos applications mobiles Faites découvrir vos créations (Android, BlackBerry, iPhone, MeeGo, WinPhone, etc.) aux 220 000 professionnels de notre communauté Dans l'optique de vous offrir un service de qualité, Developpez.com vous propose un espace pour présenter vos applications mobiles. Quels sont les avantages ? En présentant votre projet sur Developpez.com, vous le mettez sur le devant de la scène francophone, en l'exposant aux 220 000 développeurs et professionnels de l'informatique qui visitent chaque jour Developpez.com, vous serez à même de trouver des personnes intéressées pour contribuer, tester ou vous faire des retours constructifs...

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• Lancement de Windows Phone 8 : encore quelques nouveautés, les premiers modèles disponibles ce week-end et le SDK dès ce soir

  Lancement de Windows Phone 8 : Microsoft vise grand public et professionnels Les premiers modèles disponibles ce week-end, le SDK dès ce soir Microsoft en avait déjà beaucoup dit sur Windows Phone 8. Mais il lui en restait encore (un peu) à dévoiler. En France, sur la scène du Palais de Tokyo, c'est Marc Jalabert, le directeur de la division grand public et opérateurs de Microsoft France, qui a commencé par confirmer en guise de préambule que la galerie du nouvel OS avait bien dépassé les 120.000 applications. Une information jusqu'ici officieuse. Puis quelques minutes plus tard, c'est Joe Belfiore qui a de...

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• Where in a typical rendering pipeline does visibility and shading occur?

  - by user29163

  I am taking a computer graphics course. The book and the lecture notes are vague on the on the order of flow between the different steps in the rendering process. For example, if we have specified a view in a scene, and then want to perform a projection transformation for that given view, then we have to go through a sequence of transformations. In the end we end up with a normalized "viewcube" ready to be mapped 2D after clipping. But why do we end up with a cube (ie 3D thing), when a projection results in projecting the 3D objects to 2D. (depth information is lost?) The other line of reasoning is that all information further needed is stored within the "cube" and that visibility detection and shading is performed with respect to this cube and then we perform rasterezation.

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• Which optional features would you recommend for a raytracer? [closed]

  - by locks

  I'm developing a basic triangle mesh raytracer on a short deadline. This means I can't implement every feature I come across, so I'm looking for some feedback about which features you think are most important, taking into consideration the performance of the feature and how much punch it packs. I'm especially looking for optimization techniques that allow for a faster rendering and simple techniques that make a big impact on the final scene quality. Is there any chance of making it fast enough to run in realtime? Here are some example of features I've read about: Anti-aliasing Bounding box Sky box

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• How should i learn to make a game in c++ [on hold]

  - by Foo

  I been having a lot of trouble making a game by myself in c++. I know c++, I know how to implement anything I just don't know how to make all the classes work into a game it just turn into a lot of useless coding and the game never get off the basic drawing, input etc. I read sfml game developemt and the choice the author make are working and I say to myself "I would have never thought of making a scene node class and doing x that way" I just think I can't put my thoughts into working classes and make them communite the right way and make it work. Any help. Sorry I got bad English and I am not a native English speaker. And a grammar edits are welcome and tag fixing.

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• Directional Lights

  - by Setrio

  I'm working on a game idea (2D) that needs directional lights. Basically I want to add light sources that can be moved and the light rays interact with the other bodies on the scene. What I'm doing right now is some test where using sensors (box2d) and ccDrawLine I could achieve something similar to what I want. Basically I send a bunch of sensors from certain point and with raycast detect collisions, get the end points and draw lines over the sensors. Just want to get some opinions if this is a good way of doing this or is other better options to build something like this? Also I would like to know how to make a light effect over this area (sensors area) to provide a better looking light effect. Any ideas?

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• Spécial Rétrospective 2010 sur Développez : quels événements IT vous ont le plus marqué cette année ?

  Spécial Rétro 2010 Quels événements IT vous ont le plus marqué cette année ? En collaboration avec Idelways Cloud computing, mobiles, réseaux sociaux, HTML5, Wikileaks... l'année 2010 touche à sa fin et force est de constater qu'elle fut riche en rebondissements dans le domaine du développement et dans l'IT d'une manière générale. Cette année a tout particulièrement été marquée par le retour fracassant d'Oracle sur le devant de la scène médiatique. Rachats, poursuites judiciaires, forks, déclarations assassines, abandons et lancement de produits... bref, Oracle était partout en 2010. Tout a vraiment commencé après la

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• ????JavaFX??Java???????·?????????????????Java Developer Workshop #2?????|WebLogic Channel|??????

  - by ???02

  WebLogic Server?????????Java???????????????????WebLogic Channel?????????JavaOne 2011??Java/Java EE????????!――???????????????!!?????????????????????JavaOne 2011????????????????????????????????????JavaFX?????2011?12?1?????????????Java?????????????Java Developer Workshop #2????JavaOne 2011?JavaFX???????????????Oracle Corporation?JavaFX??????Nandini Ramani?(Client Java Group???????????)??????JavaFX 2.0-Next generation Java client solution????????????????????JavaFX?????????????????????(???)?Pure Java???????UI??????JavaFX 2.0??JavaOne 2011??Java/Java EE????????!???????????API????Java????????????1?????????Ramani?????????JavaFX????????JavaFX 2.0??????????????????????　???JavaFX 2.0?????????????????????????????????JavaFX Script??????????????????Java?????????????·???????????????????????Java?????????????????????????????　??????????????PC????????????·??????????????????????????????????????API???????????????????·?????????????????????????????????????????????900????????????Java???????????JavaFX??????????????????????????????·???????(UI)????????????????????(Ramani?)　Ramani??????JavaFX 2.0??????/???????????100% Java API?Swing????FXML???UI????????WebKit???Web????????????????????????????　??????FXML(FX Markup Language)???JavaFX?UI????????XML????????????????Ramani????????????????????????????????·?????????????UI????????????????????????JavaScript?Groovy?Scala???JVM????????????????????????　???JavaFX 2.0????????(JavaFX Runtime)???????????????????????AWT????????????????OS???????????????Glass Windowing Toolkit??2D/3D????????·???????GPU???????????Prism????????????????　?????Prism????????????????·??????????3D?????????????????????????????????????????????·????????60fps??HD??????????VP6?MP3?????????????????????????????????????·??????????????　?????????????????????????JavaFX 2.0???????Ramani???????????????????·????????????·???????????????????????????????JavaFX 2.0?????????????·?????????????????????????????????????Prism???????????????????????????????????????????????????????????????????????JavaFX??????????·??????????????????????????????????????????????/???????????(?????????)????????????????????　??????????????????NetBeans IDE 7.0?????Eclipse?JDeveloper???????IDE?????????????????????????????&??????????????UI???????JavaFX Scene Builder????????　?????JavaFX 2.0???????????·???????????????3D????????????·????????????????????????????????????Ramani????JavaFX Labs????????????JavaFX 2.0????????????????????????????3D???????????????????????????????UI?????????????????????????????????????3D???·?????????????????　???JavaFX 2.0?????????????3D?????????·??????·??????????????????????·?????·?????Kinect?????????????????????·?????????????????????·?????·????Kinect????3D??????????????????????????????　????JavaFX????????????????????????JavaFX????????·?????????Linux?????????PC?iPad????????????????????　?????????2???????????JavaFX??Java??????????????????GUI?????????????????????????????JavaFX??????????????????????Ramani???????????　?JavaFX???????????????????????????????·??????????????????Swing?AWT???????????????·?????????????????????????????????????　???JavaFX???????????·???????OpenJFX?????OpenJDK????????????????????????????UI??????????????????Ramani??????????????????????????????????????????????Java???????????????????JavaFX???????????????????????????????????????????:?Java Developer Workshop #2?????Nandini Ramani?????????????????????

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• WPF 3.5 RenderTargetBitmap memory hog

  - by kingRauk

  I have a 3.5 WPF application that use's RenderTargetBitmap. It eat's memory like a big bear. It's is a know problem in 3.5 that RenderTargetBitmap.Render has memory problems. Have find some solutions for it, but i doesnt help. https://connect.microsoft.com/VisualStudio/feedback/details/489723/rendertargetbitmap-render-method-causes-a-memory-leak Program takes too much memory And more... Does anyway have any more ideas to solve it... static Image Method(FrameworkElement e, int width, int height) { const int dpi = 192; e.Width = width; e.Height = height; e.Arrange(new Rect(0, 0, width, height)); e.UpdateLayout(); if(element is Graph) (element as Graph).UpdateComponents(); var bitmap = new RenderTargetBitmap((int)(width*dpi/96.0), (int)(height*dpi/96.0), dpi, dpi, PixelFormats.Pbgra32); bitmap.Render(element); var encoder = new PngBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(bitmap)); using (var stream = new MemoryStream()) { encoder.Save(stream); element.Clip = null; Dispose(element); bitmap.Freeze(); DisposeRender(bitmap); bitmap.Clear(); GC.Collect(); GC.WaitForPendingFinalizers(); return System.Drawing.Image.FromStream(stream); } } public static void Dispose(FrameworkElement element) { GC.Collect(); GC.WaitForPendingFinalizers(); GC.Collect(); } public static void DisposeRender(RenderTargetBitmap bitmap) { if (bitmap != null) bitmap.Clear(); bitmap = null; GC.Collect(); GC.WaitForPendingFinalizers(); }

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• EF 4, POCO and AddOrUpdate

  - by Eric J.

  I'm trying to create a method on an EF 4 POCO repository called AddOrUpdate. The idea is that the business layer can pass in a POCO object and the persistence framework will add the object if it is new (not yet in the database), else will update the database (once SaveChanges() is called) with the new value. This is similar to some other questions I have asked about EF, but I'm only about 80% there in understanding this so please forgive partial duplication. The part I'm missing is how to update the object graph in my ObjectContext/associated ObjectSet for the passed-in business object once I have determined that the business object indeed already exists in the database (and now has been loaded thanks to TryGetObjectByKey). ApplyCurrentValues sounds sort of like what I want, but it only copies scalar values and doesn't seem intended to update the object graph in the ObjectContext/ObjectSet. Because of my particular use case I don't care about concurrency right now. public void AddOrUpdate(BO biz) { object obj; EntityKey ek = Ctx.CreateEntityKey(mySetName, biz); bool found = Ctx.TryGetObjectByKey(ek, out obj); if (found) { // How do I do what this method name implies? Biz is a parent with children. mySet.TellTheSetToUpdateThisObject(biz); } else { mySet.AddObject(biz); } Ctx.DetectChanges(); }

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• Determining the maximum stack depth

  - by Joa Ebert

  Imagine I have a stack-based toy language that comes with the operations Push, Pop, Jump and If. I have a program and its input is the toy language. For instance I get the sequence Push 1 Push 1 Pop Pop In that case the maximum stack would be 2. A more complicated example would use branches. Push 1 Push true If .success Pop Jump .continue .success: Push 1 Push 1 Pop Pop Pop .continue: In this case the maximum stack would be 3. However it is not possible to get the maximum stack by walking top to bottom as shown in this case since it would result in a stack-underflow error actually. CFGs to the rescue you can build a graph and walk every possible path of the basic blocks you have. However since the number of paths can grow quickly for n vertices you get (n-1)! possible paths. My current approach is to simplify the graph as much as possible and to have less possible paths. This works but I would consider it ugly. Is there a better (read: faster) way to attack this problem? I am fine if the algorithm produces a stack depth that is not optimal. If the correct stack size is m then my only constraint is that the result n is n = m. Is there maybe a greedy algorithm available that would produce a good result here?

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• "Pretty" Continuous Integration for Python

  - by dbr

  This is a slightly.. vain question, but BuildBot's output isn't particularly nice to look at.. For example, compared to.. phpUnderControl Hudson CruiseControl.rb ..and others, BuildBot looks rather.. archaic I'm currently playing with Hudson, but it is very Java-centric (although with this guide, I found it easier to setup than BuildBot, and produced more info) Basically: is there any Continuous Integration systems aimed at python, that produce lots of shiney graphs and the likes? Update: After trying a few alternatives, I think I'll stick with Hudson. Integrity was nice and simple, but quite limited. I think Buildbot is better suited to having numerous build-slaves, rather than everything running on a single machine like I was using it. Setting Hudson up for a Python project was pretty simple: Download Hudson from https://hudson.dev.java.net/ Run it with java -jar hudson.war Open the web interface on the default address of http://localhost:8080 Go to Manage Hudson, Plugins, click "Update" or similar Install the Git plugin (I had to set the git path in the Hudson global preferences) Create a new project, enter the repository, SCM polling intervals and so on Install nosetests via easy_install if it's not already In the a build step, add nosetests --with-xunit --verbose Check "Publish JUnit test result report" and set "Test report XMLs" to **/nosetests.xml That's all that's required. You can setup email notifications, and the plugins are worth a look. A few I'm currently using for Python projects: SLOCCount plugin to count lines of code (and graph it!) - you need to install sloccount separately Violations to parse the PyLint output (you can setup warning thresholds, graph the number of violations over each build) Cobertura can parse the coverage.py output. Nosetest can gather coverage while running your tests, using nosetests --with-coverage (this writes the output to **/coverage.xml)

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• C# Linq List Contains Similar Elements

  - by John Peters

  Hi All, I am looking for linq query to see if there exists a similar object I have an object graph as follows Cart myCart = new Cart { List<CartProduct> myCartProduct = new List<CartProduct> { CartProduct cartProduct1 = new CartProduct { List<CartProductAttribute> a = new List<CartProductAttribute> { CartProductAttribute cpa1 = new CartProductAttribute{ title="red" }, CartProductAttribute cpa2 = new CartProductAttribute{ title="small" } } } CartProduct cartProduct2 = new CartProduct { List<CartProductAttribute> d = new List<CartProductAttribute> { CartProductAttribute cpa3 = new CartProductAttribute{ title="john" }, CartProductAttribute cpa4 = new CartProductAttribute{ title="mary" } } } } } I would like to get from the Cart = a CartProduct that has the exact same CartProductAttribute title values as a CartProduct that I need to compare. No more and no less. E.G. I need to find a similar CartProduct that has a CartProductAttribute with title="red" and a cartProductAttribute with title="small" in myCart (eg 'cartProduct1' in the example) CartProduct cartProductToCompare = new CartProduct { List<CartProductAttribute> cartProductToCompareAttributes = new List<CartProductAttribute> { CartProductAttribute cpa5 = new CartProductAttribute{ title="red" }, CartProductAttribute cpa6 = new CartProductAttribute{ title="small" } } } So from object graph myCart cartProduct1 cpa1 (title=red) cpa2 (title=small) cartProduct2 cpa3 (title=john) cpa4 (title=mary) Linq query looking for cartProductToCompare cpa5 (title=red) cpa6 (title=small) Should find cartProduct1 Hope all this makes sense... Thanks

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• Facebook Oauth 2.0 Token errors

  - by James

  The user clicks the URL that is generated via the code below. $url = 'https://graph.facebook.com/oauth/authorize?' . http_build_query(array('client_id' => FACEBOOK_APP_ID, 'redirect_uri' => 'http://fb.example.com/facebook', 'scope' => 'publish_stream,email,offline_access,user_location,user_hometown', 'display' => 'page')); Upon granting access to the application, and redirecting to http://fb.example.com/facebook I grab the following URL using cURL. $url = 'http://graph.facebook.com/oauth/access_token?' . http_build_query(array('client_id' => FACEBOOK_APP_ID, 'client_secret' => FACEBOOK_SECRET, 'redirect_uri' => 'http://fb.example.com/facebook', 'code' => $params['code'])); This returns the error below that I receive when grabbing the above URL. { "error": { "type": "OAuthException", "message": "Error validating verification code." } } Any ideas? Really getting stuck on this.

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• ASP.NET with MS Chart disable the vertical line

  - by Bayonian

  Hi, I have a graph created with MS Chart like the following picture. As you can see the vertical lines are messed up with value of the top of each bar. Here's the mark-up for the graph: <asp:Chart ID="chtNBAChampionships" runat="server"> <Series> <asp:Series Name="Championships" YValueType="Int32" ChartType="Column" ChartArea="MainChartArea" IsValueShownAsLabel="true"> <Points> <asp:DataPoint AxisLabel="Celtics" YValues="17" /> <asp:DataPoint AxisLabel="Lakers" YValues="15" /> <asp:DataPoint AxisLabel="Bulls" YValues="6" /> <asp:DataPoint AxisLabel="Spurs" YValues="4" /> <asp:DataPoint AxisLabel="76ers" YValues="3" /> <asp:DataPoint AxisLabel="Pistons" YValues="3" /> <asp:DataPoint AxisLabel="Warriors" YValues="3" /> </Points> </asp:Series> </Series> <ChartAreas> <asp:ChartArea Name="MainChartArea"> </asp:ChartArea> </ChartAreas> </asp:Chart> I don't want the display the vertical line because it's messed up with the value on top of the each bar. How can I disable the vertical line? Thank you.

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• Java JUnit: The method X is ambiguous for type Y

  - by Rosarch

  I had some tests working fine. Then, I moved it to a different package, and am now getting errors. Here is the code: import static org.junit.Assert.*; import java.util.HashSet; import java.util.Map; import java.util.Set; import org.jgrapht.Graphs; import org.jgrapht.WeightedGraph; import org.jgrapht.graph.DefaultWeightedEdge; import org.jgrapht.graph.SimpleWeightedGraph; import org.junit.*; @Test public void testEccentricity() { WeightedGraph<String, DefaultWeightedEdge> g = generateSimpleCaseGraph(); Map<String, Double> eccen = JGraphtUtilities.eccentricities(g); assertEquals(70, eccen.get("alpha")); assertEquals(80, eccen.get("l")); assertEquals(130, eccen.get("l-0")); assertEquals(100, eccen.get("l-1")); assertEquals(90, eccen.get("r")); assertEquals(120, eccen.get("r-0")); assertEquals(130, eccen.get("r-1")); } The error message is this: The method assertEquals(Object, Object) is ambiguous for the type JGraphtUtilitiesTest How can I fix this? Why did this problem occur as I moved the class to a different package?

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• Debugging SIGABRT within NSManagedObjectContext -save:

  - by westsider

  From inside NSManagedObjectContext -save: I am getting this message: Assertion failed: (_Unwind_SjLj_Resume() can't return), function _Unwind_SjLj_Resume, file /SourceCache/libunwind/libunwind-24.1/src/Unwind-sjlj.c, line 326. Program received signal: “SIGABRT”. warning: Unable to read symbols for /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib (file not found). This happens when I delete an Experiment object with to-many with Run which has to-many with Sample which has to-one with Data. Experiment also has to-many with Page which has to-many with Display which has to-many to Run. I mention this to point out the cyclical nature of the graph. Here is a simplified graph of model: I had been using Delete Rules but have now switched to "No Action" delete rules in combination with -prepareForDeletion methods for all of these classes. This change made no difference. In both cases, the error message is the same. Interestingly, when I relaunch the app, all the objects that were marked for deletion have been deleted. Also, if an Experiment has no Run objects, then deletion works without incidence. For that matter, deleting a single Run from an Experiment also works. I am hoping that someone has seen something like this and can offer advice on what would cause this. Or, if someone has advice on how to get libXcodeDebuggerSupport.dylib for iOS 4.2.1, that might also be helpful. Update: I followed advice found here and was able to get Xcode to find libXcodeDebuggerSupport.dylib for iOS 4.2.1. But this did not help at all in diagnosing problem - which persists.

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• Facebook like and share create a fanpage

  - by nblumoe

  We are using the facebook like plugin with the share button. The URL points to a resource of our app. For example http://apps.facebook.com/appname/resources/id The first time this resource/url is shared or liked, everything works fine. The share for example holds the URL given above. But if the same resource/url is shared again, an error occurs. Facebook did create a fanpage for that resource like http://www.facebook.com/pages/appname So from now on, share/likes refer to that page instead of the resource/url of our app. The URL we use for the like plugin is correct and always points to the app resource URL. The fbappid in there is correct, too. Furthermore the page of the resource holds open graph meta tags like og:url, also pointing to the correct URL. The facebook linter/debugger returns URLs to the correct app resource URLs, when checking the liked/shared resource. Why is a fanpage created instead and the URL exchanged in shares/likes? How to fix it? We want the share to include the URL of the app resource and to increase the like count for that open graph object.

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• subgraph cluster ranking in dot

  - by Chris Becke

  I'm trying to use graphviz on media wiki as a documentation tool for software. First, I documented some class relationships which worked well. Everything was ranked vertically as expected. But, then, some of our modules are dlls, which I wanted to seperate into a box. When I added the nodes to a cluster, they got edged, but clusters seem to have a LR ranking rule. Or being added to a cluster broke the TB ranking of the nodes as the cluster now appears on the side of the graph. This graph represents what I am trying to do: at the moment, cluster1 and cluster2 appear to the right of cluster0. I want/need them to appear below. <graphviz> digraph d { subgraph cluster0 { A -> {B1 B2} B2 -> {C1 C2 C3} C1 -> D; } subgraph cluster1 { C2 -> dll1_A; dll1_A -> B1; } subgraph cluster2 { C3 -> dll2_A; } dll1_A -> dll2_A; } </graphviz>

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• Unable to display wap version during "Extended permission"

  - by Mickey Cheong

  Hi, Im trying to redirect to facebook to request permission to publish stream. However, it only works when i did not specify any display parameters, it shows me a web version of it. I wanted a wap version instead. What should I do? Here's the code: <form method="post" action="https://graph.facebook.com/oauth/authorize"> <input type="hidden" name="client_id" value="1XXXXXXXXXXXXXX" /> <input type="hidden" name="scope" value="publish_stream" /> <input type="hidden" name="redirect_uri" value="http://www.redirect.com/" /> <input class="button" type="submit" value="Request..." /> </form> When i submit this form, it will redirect to http://www.facebook.com/connect/prompt_ … y=page.... If I were to change the "redirected url"'s display param to "wap" it will works. However, if I were to submit to https://graph.facebook.com/oauth/authorize?display=wap. Nothing will happen and it will redirect back to the source url. Any help/hint will be grateful. Thanks a mil, Mickey

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• How to add an image dynamically at runtime in java

  - by Brandon

  I've been trying to load up an image dynamically in runtime for the longest time and have taken a look at other posts on this site and have yet to find exactly the thing that will work. I am trying to load an image while my GUI is running (making it in runtime) and have tried various things. Right now, I have found the easiest way to create an image is to use a JLabel and add an ImageIcon to it. This has worked, but when I go to load it after the GUI is running, it fails saying there is a "NullPointerException". Here is the code I have so far: p = Runtime.getRuntime().exec("python C:\\FaceVACS\\roc.py " + "C:/FaceVACS/OutputCMC_" + target + ".txt " + "C:/FaceVACS/ROC_" + target + ".png"); Icon graph = new ImageIcon("C:\\FaceVACS\\OutputCMC_" + target + ".png"); roc_image.setIcon(graph); panel.add(roc_image); panel.revalidate(); gui.frame.pack(); I tried panel.validate(), panel.revalidate(), and I've also tried gui.getRootPane(), but I can't seem to find anything that will work. Any ideas would be helpful! Thanks

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• Matlab-Bisection-Newton-Secant , finding roots?

  - by i z

  Hello and thanks in advance for your possible help ! Here's my problem: I have 2 functions f1(x)=14.*x*exp(x-2)-12.*exp(x-2)-7.*x.^3+20.*x.^2-26.*x+12 f2(x)=54.*x.^6+45.*x.^5-102.*x.^4-69.*x.^3+35.*x.^2+16.*x-4 Make the graph for those 2, the first one in [0,3] and the 2nd one in [-2,2]. Find the 3 roots with accuracy of 6 decimal digits using a) bisection ,b) newton,c)secant.For each root find the number of iterations that have been made. For Newton-Raphson, find which roots have quadratic congruence and which don't. What is the main common thing that roots with no quadratic congruence (Newton's method)? Why ? Excuse me if i ask silly things, but i'm asked to do this with no Matlab courses and I'm trying to learn it myself. There are many issues i have with this exercise . Questions : 1.I only see 2 roots in the graph for the f1 function and 4-5 (?) roots for the function f2 and not 3 roots as the exercise says. Here's the 2 graphs : http://postimage.org/image/cltihi9kh/ http://postimage.org/image/gsn4sg97f/ Am i wrong ? Do both have only 3 roots in [0,3] and [-2,2] ? Concerning the Newton's method , how am i supposed to check out which roots have quadratic congruence and which not??? Accuracy means tolerance e=10^(-6), right ?

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• jitter if multiple outliers in ggplot2 boxplot

  - by Andreas

  I am trying to find a suitable display to illustrate various properties within and across school classes. For each class there is only 15-30 data points (pupils). Right now i am leaning towards a whisker-less boxplot, showing only 1.,2. and 3. quartile + datapoints more then e.g. 1 population SD +/- the sample median. This I can do. However - I need to show this graph to some teachers, in order to gauge what they like most. I'd like to compare my graph with a normal boxplot. But the normal boxplot looks the same if there is only one outlier, or e.g. 5 outliers at the same value. In this case this would be a deal-breaker. e.g. test <-structure(list(value = c(3, 5, 3, 3, 6, 4, 5, 4, 6, 4, 6, 4, 4, 6, 5, 3, 3, 4, 4, 4, 3, 4, 4, 4, 3, 4, 5, 6, 6, 4, 3, 5, 4, 6, 5, 6, 4, 5, 5, 3, 4, 4, 6, 4, 4, 5, 5, 3, 4, 5, 8, 8, 8, 8, 9, 6, 6, 7, 6, 9), places = structure(c(1L, 2L, 1L, 1L, 1L, 2L, 1L, 2L, 1L, 2L, 1L, 2L, 2L, 2L, 2L, 2L, 1L, 1L, 2L, 2L, 2L, 1L, 2L, 1L, 1L, 1L, 1L, 2L, 1L, 2L, 1L, 2L, 2L, 2L, 1L, 2L, 1L, 2L, 2L, 1L, 1L, 2L, 2L, 1L, 1L, 1L, 1L, 2L, 1L, 1L, 2L, 2L, 2L, 1L, 1L, 2L, 2L, 1L, 2L, 1L), .Label = c("a", "b"), class = "factor")), .Names = c("value", "places"), row.names = c(NA, -60L), class = "data.frame") ggplot(test, aes(x=places,y=value))+geom_boxplot() Here there are two outliers at ("a",9) - but only one "dot" shown. So my question: How to jitter the outliers. And - what kind of display would you suggest for this kind of data?

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• Handling dependencies with IoC that change within a single function call

  - by Jess

  We are trying to figure out how to setup Dependency Injection for situations where service classes can have different dependencies based on how they are used. In our specific case, we have a web app where 95% of the time the connection string is the same for the entire Request (this is a web application), but sometimes it can change. For example, we might have 2 classes with the following dependencies (simplified version - service actually has 4 dependencies): public LoginService (IUserRepository userRep) { } public UserRepository (IContext dbContext) { } In our IoC container, most of our dependencies are auto-wired except the Context for which I have something like this (not actual code, it's from memory ... this is StructureMap): x.ForRequestedType().Use() .WithCtorArg("connectionString").EqualTo(Session["ConnString"]); For 95% of our web application, this works perfectly. However, we have some admin-type functions that must operate across thousands of databases (one per client). Basically, we'd want to do this: public CreateUserList(IList<string> connStrings) { foreach (connString in connStrings) { //first create dependency graph using new connection string ???? //then call service method on new database _loginService.GetReportDataForAllUsers(); } } My question is: How do we create that new dependency graph for each time through the loop, while maintaining something that can easily be tested?

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