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  • Load XML to DataFrame in R

    - by Rohit Kandhal
    I am new to R programming and trying to load a simple XML in RStudio. I tried using XMLToDataFrame but got this error XML content does not seem to be XML: 'temp.xml' XML Schema <root> <row Id="1" UserId="1" Name="Rohit" Date="2009-06-29T10:28:58.013" /> <row Id="2" UserId="3" Name="Rohit" Date="2009-06-29T10:28:58.030" /> </root> Please provide me some direction on which function I should use here.

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  • Computing orientation of a square and displaying an object with the same orientation

    - by Robin
    Hi, I wrote an application which detects a square within an image. To give you a good understanding of how such an image containing such a square, in this case a marker, could look like: What I get, after the detection, are the coordinates of the four corners of my marker. Now I don't know how to display an object on my marker. The object should have the same rotation/angle/direction as the marker. Are there any papers on how to achieve that, any algorithms that I can use that proofed to be pretty solid/working? It doesn't need to be a working solution, it could be a simple description on how to achieve that or something similar. If you point me at a library or something, it should work under linux, windows is not needed but would be great in case I need to port the application at some point. I already looked at the ARToolkit but they you camera parameter files and more complex matrices while I only got the four corner points and a single image instead of a whole video / camera stream.

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  • What effects drawing charts/diagrams from $_SESSION data under php5, which worked under php4?

    - by ste_php
    Hello, I have a script generating 3 diagrams from $_SESSION variables which work fine under php4 with register_globals = off, but when I parse the same script as php5 I get no diagram. The diagrams a drawn from GD libary and it works, if I set the data into an Array (manually filled) within the script file. But I need a way to get it work on php5, without much changes. Are there any SESSION settings or php-settings which might interfere with my script. I already checked a lot of the php-settings (changing php.ini over and over again), but found nothing what brings me the diagrams back. Hopefully someone of you could kick me into the right direction. Any Ideas? Thanks a lot.

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  • Trying to integrate Jeditable+MarkItUp and Thickbox/Lightbox

    - by Bob Sawyer
    I've managed to successfully integrate MarkItUp with Jeditable based on the instructions on those two sites. What I would really like to do, however, is to have the Jeditable/MarkItUp editing window appear in a Thickbox or Lightbox overlay. So far my attempts to do this have not been successful. So, at the moment, I have the standard code: $.editable.addInputType('markitup', { element : $.editable.types.textarea.element, plugin : function(settings, original) { $('textarea', this).markItUp(settings.markitup); } }); $(".editme").editable("/content/save", { event : 'dblclick', type : 'markitup', submit : 'OK', cancel : 'Cancel', width : 640, height : 'auto', tooltip : 'Double-click to edit...', onblur : 'ignore', markitup : mySettings }); I've found other posts here that show how to trigger the edit box by clicking on a link rather than the object itself, and I've tried integrating that with the Thickbox calls, to no avail. Would appreciate anyone pointing me in the right direction. Thanks!

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  • Try-Catch-Throw in the same Java class

    - by Carlos
    Is it possible to catch a method in the current class the try-catch block is running on? for example: public static void arrayOutOfBoundsException(){ System.out.println("Array out of bounds"); } ..... public static void doingSomething(){ try { if(something[i] >= something_else); } catch (arrayOutOfBoundsException e) { System.out.println("Method Halted!, continuing doing the next thing"); } } If this is possible how will it be the correct way to call the catch method? If this is not possible, could anyone point me in the right direction, of how to stop an exception from halting my program execution in Java without having to create any new classes in the package, or fixing the code that produces ArrayOutOfBoundsException error. Thanks in Advance, A Java Rookie

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  • Silverlight Binding to TranslateX

    - by Peanut
    I have a simple winphone7 application, but I think this would apply to any silverlight. Basically I have an ellipse and I would like to move it with the translate X and Y properties. Here is my attempt: <Ellipse Fill="#FFF4F4F5" Margin="0,0,-3,-3" Stroke="Black" RenderTransformOrigin="0.5,0.5" > <Ellipse.RenderTransform> <CompositeTransform TranslateY="{Binding Y}" TranslateX="{Binding X}"/> </Ellipse.RenderTransform> </Ellipse> I am pretty sure the Binding is set correctly; The problem is it gives me this error when I run the application: 2260 An error has occurred. [Line: 4 Position: 33] which is a XAML error. The error goes away when I comment out the composittransform line. Can anyone point me in a right direction? If you need more code let me know, i'll post more up. Thanks

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  • iPhone: Activate UISlider and set its value to the location of the current touch programatically

    - by carloe
    Is it possible to set an UISlider as first responder and set its current value to the location of the current touch programatically? The way my app is set up I have a UIView container that takes up the whole screen. Inside the container I have another UIView offscreen at the bottom edge (I'll call this bottomBar). Inside the bottomBar there is a UISlider element. Right now, when the user swipes along the bottom edge of the screen the bottomBar the slider it contains slide up. What I am trying to achieve is to activate the UISlider, and set the position of the slider (the value) to the position of the users touch. Is this possible? Could someone please point me in the right direction?

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  • Drawing triangle/arrow on a line with CGContext

    - by Pete
    Hi, I am using the framework of route-me for working with locations. In this code the path between two markers(points) will be drawn as a line. My Question: "What code should I add if I want to add an arrow in the middle(or top) of the line, so that it points the direction" Thanks - (void)drawInContext:(CGContextRef)theContext { renderedScale = [contents metersPerPixel]; float scale = 1.0f / [contents metersPerPixel]; float scaledLineWidth = lineWidth; if(!scaleLineWidth) { scaledLineWidth *= renderedScale; } //NSLog(@"line width = %f, content scale = %f", scaledLineWidth, renderedScale); CGContextScaleCTM(theContext, scale, scale); CGContextBeginPath(theContext); CGContextAddPath(theContext, path); CGContextSetLineWidth(theContext, scaledLineWidth); CGContextSetStrokeColorWithColor(theContext, [lineColor CGColor]); CGContextSetFillColorWithColor(theContext, [fillColor CGColor]); // according to Apple's documentation, DrawPath closes the path if it's a filled style, so a call to ClosePath isn't necessary CGContextDrawPath(theContext, drawingMode); }

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  • Stuffed Animal In OpenGL

    - by anon
    I have seen metal/plastic/water/fire/... shaders for OpenGL. However, it it possible to render something fur-like, say a stuffed animal / teddy bear in OpenGL (I know this is possible with renderman / ray tracers, but I want to do it in OpenGl). If you have pointers to GLSl shaders for this, please point me in the right direction. Thanks! [I'm guessing the answer is no since fur requires more than just shaders -- it almost requires creating geometry on the fly -- but I'd love to be proven wrong)]

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  • Web App for smartphones in ASPX

    - by Ryan Knoll
    I have been looking around recently to try and find a good place to learn how to start making my website more smartphone friendly when it is visited by an iPhone, android, or blackberry. This is something like what Digg.com does when it is visited by a smartphone. I have found a few tutorials for PHP but none for ASPX, and all I have is windows servers. Could anyone point me in the right direction, and show me were to find a quick run through on how to do something like this? I am a bit lost. :(

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  • AJAX call in a continuously loop?

    - by Mestika
    Hi, I want to create some kind of AJAX script or call that continuously will check a MySQL database if any new messages has arrived. When there is a new message in the database, the AJAX script should invoke a kind of alert box or message box. I’m not quite a AJAX expert (yet anyway) and have Googled around to find a solution but I’m having a hard time to figure out where to begin. I imagine that it is kind of the same method that an AJAX chat is using to see if any new chat-message has been send. I’ve also tried to search for AJAX (httpxmlrequest) call in a continuously and infinity loop but still haven’t got a solution yet. I hope there is someone, which can help me with such a AJAX script or maybe nudge me in the right direction. Thanks Sincerely Mestika

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  • Interacting with RESTful API's via Javascript?

    - by Alex
    Hi there, to start off, I know C++, C#, Python, some Ruby, and basic Javascript. Anyway, my question revolves around how to interact with RESTful API's via Javascript. I haven't been able to find any good examples on various websites, and so I've come here. So my basic question is: How do I interact with RESTful API's via JS? And where can I find out how to implement OAuth in JS? I know how to get my keys and such, just not how to actually code them in. Below is an example of a twitter API status update run from my MAC terminal with curl: curl -u username:password -d "my tweet" http://api.twitter.com/1/statuses/update.json How can I implement this in Javascript (preferably with OAuth authentication)? This would at least start me going in the right direction. Thanks so much!!

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  • Django loading mysql data into template correctly

    - by user805981
    I'm new to django and I'm trying to get display a list of buildings and sort them alphabetically, then load it into an html document. Is there something that I am not doing correctly? below is models.py class Class(models.Model): building = models.CharField(max_length=20) class Meta: db_table = u'class' def __unicode__(self): return self.building below is views.py views.py def index(request): buildinglist = Class.objects.all().order_by('building') c = {'buildinglist': buildinglist} t = loader.get_template('index.html') return HttpResponse(t.render(c)) below is index.html index.html {% block content%} <h3>Buildings:</h3> <ul> {% for building in buildinglist %} <li> <a href='www.{% building %}.com'> # ex. www.searstower.com </li> {% endfor %} </ul> {% endblock %} Can you guys point me in the right direction? Thank you in advance guys! I appreciate your help very much.

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  • OpenGL billboard interpolation issue

    - by PeanutPower
    I have a billboard quad with a texture mapped onto it. This is basically some text with transparency. The billboard floats forwards and backwards from the camera's perspective. As the billboard moves away (and appears smaller) there is an flickering effect around the edges of the text where there is a stroke border on the actual texture. I think this is because interpolation is needed as the image which is normally X pixels wide is now shown as only a % of X and some pixels need to be merged together. I guess it's doing nearest neighbour or something? Can anyone point me in the right direction for opengl settings to control this, I'm guessing there is some way of preventing this effect from happening by adjusting the method for how the texture is handled ?

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  • Algorithm for parsing a flat tree into a non-flat tree

    - by Chad Johnson
    I have the following flat tree: id name parent_id is_directory =========================================================== 50 app 0 1 31 controllers 50 1 11 application_controller.rb 31 0 46 models 50 1 12 test_controller.rb 31 0 31 test.rb 46 0 and I am trying to figure out an algorithm for getting this into the following tree structuree: [{ id: 50, name: app, is_directory: true children: [{ id: 31, name: controllers, is_directory: true, children: [{ id: 11, name: application_controller.rb is_directory: false },{ id: 12, name: test_controller.rb, is_directory: false }], },{ id: 46, name: models, is_directory: true, children: [{ id: 31, name: test.rb, is_directory: false }] }] }] Can someone point me in the right direction? I'm looking for steps (eg. build an associative array; loop through the array looking for x; etc.).

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  • Embedding Ruby, calling a function from C

    - by ThePower
    Hi, I'm writing an app that calls ruby code from c. I am having a little difficulty and wondered if anyone could point me in the rite direction. I currently have in my C. #include ruby.h main() { ruby_init(); rb_require("myRubyFile"); rb_funcall(rb_module_new(), rb_intern("RubyFunction"), 0, NULL); } My ruby file is in the same directory as my c file and is called myRubyFile.rb and contains a definition of the function RubyFunction(). This is a cut down of what I actually want to do, just making it more readable for others. I just require some feedback as to whether this is the correct method to call ruby code from my c file. Regards

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  • Pool Billiard AI

    - by Sebi
    Im implementing a pool billiard game in Java and it all works fine. It is a multiplayer game, but nevertheless, it should also be possible to play it alone. For this purpose I'm trying to implement a simple KI. At the moment, the KI choose just randomly a direction and a random intensity of the impulse (don't know the correct english word for that). Of course this AI is very poor and unlikely to ever challenge a player. So i thought about improving the KI, but there are several hard to solve problems. First I thought of just choosing the nearest ball and to try to put it directly into the nearest hole. This isn't that bad, but if there other balls in the line between, it isn't really working anymore. Additionally this dosn't solve te problem of calculating the intensity of the impulse. So are there any general advice? Or any ideas? Best practices?

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  • Drupal Custom Form with Filters

    - by dallasclark
    I'm displaying cars on a page created with a view and displays. I want to be able to create a form on the home page to allow people to select the 'make', which will then update the 'models' list based on the 'make' the user selects, 'year' to and from, and 'amount' to and from. What the user selects will of course alter the list of used cars, whether that's on the existing used cars page or a new page. I would be happy to create a custom module if required, just need some direction. Thanks !

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  • How to Encrypt a soap request using a secretkeyspec?

    - by rocks
    I have Web Service client code generated by WSDL2Java. I am trying to encrypt the Soap Envelope specifying a CallbackHandler in the wsdd. I've managed to set a username and password in plain text on the soap request, but I need to use a key instead (I have been given a .key file which seems to be a SecretKeySpec). I load the .key file, read the bytes and then in the CallbackHandler I do the following:- encryptionKey = getBytesFromFile("mykey.key"); WSPasswordCallback pc = (WSPasswordCallback) callbacks[i]; pc.setKey(encryptionKey); But nothing relating to the encryption appears in the soap request and I get an error stating that pwd must be set. I'm totally stuck. Can anyone point me in the right direction?

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  • Multilangual Unicode rendering in opengl

    - by sum1stolemyname
    Hi Folks, I have to extend an OpenGL-Rendering System to support international characters (especially Hebrew, Arabic and cyrillic). Development Platform is Windows(XP|Vista|7), Alas using Embercardero Delphi 2010. I currently use wglOutLineFont(...) to build my font's display list and glCallLists(length(m_Text), UNSIGNED_SHORT, PWchar(m_Text) ) to render my strings. While this is feasable for Latin-1 Characters, building the full unicode character set in advanced is pretty time-consuming (about 8.5 minutes on my machine), so i am looking for a more efficient solution. I thought about limiting the range from u+0020 - u+077f (latin, greek, cyrillic, arbaic and hebrew) to include just the glyphs i need, but that would just be a solution for my current needs, and will become insufficent once other encoding is needed. On the upside, i do not have to worry about left-to right or right-to left direction as our application can handle this already. I would expect this to be a well-known problem, so i would like to ask if there is any reference material on this on the web, or if you could share some insight on this?

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  • Program for HID USB Scale

    - by Alex
    Hi guys, I'm looking for a program that can read the weight on a USB scale, namely the Pelouze 10lb USB Portable Scale. I thought it would have a virtual COM port driver but instead, it uses HID drivers. I've been searching for a whole month for a program that can help me transfer the reading of the scale to Microsoft Excel. Can someone help me out or point me in the right direction? I am absolutely illiterate to programming. Much gratitude any help given.

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  • SQLite character encoding for Google Gears

    - by MHD
    We're using jQuery to get a JSON-string from our server (UTF-8 response, also UTF-8 request through jQuery) and put this JSON into a Google Gears WorkerPool. This workerpool processes the JSON and stores it into a Gears database (SQLite). It turns out that, apparently, SQLite stores data using iso-8859-1 rather than UTF-8. Since we're trying to store user names that might contain Cyrillic characters (and others that you might encounter in Europe), this goes horribly wrong. Can anyone tell me how to change the character encoding in either the Gears WorkerPool or the SQLite database that Gears employs? Of course, if I'm looking in the wrong direction with my problem, feel free to offer alternatives! Unfortunately, HTML5 isn't an option as we're supposed to support IE7 primarily.

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  • HBase schema help

    - by Jody Powlette
    Coming from a SQL Server background, I'm a newbie with regard to HBase, but the technology looks to be a good fit for what we're doing and the cost is definitely right! I need to maintain a list of log entries which normally I would create in an RDBS as: create table Log ( UserID int, SiteID int, Page varchar(50), Date smalldatetime ) where one user may have 0 or 1000 rows in this simple table. Typical queries would be to find all the rows for one user or all the rows for one user on one site. How does this translate into a "map" in HBase where there is no "row key" AND the same (SiteID,Page) may appear many times. My first thought is that UserID is a row key, but I still don't understand "column families" and the other terminology well enough to understand how to setup the table to hold this data where the one UserID can have many (SiteID,Page,Date) "rows". Any direction is appreciated!

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  • Best recruiting SaaS available for tech startups?

    - by ajhit406
    I run a small startup and am always on the lookout for quality engineers. I've seen someone solicit SO with a similar question but there was only one response so I'm going to solicit the community again. (http://stackoverflow.com/questions/112766/free-application-to-keep-track-of-a-recruiting-process didn't suffice for me) Over a long period of time, I've found that my system of recruiting is incredibly inefficient. An applicant who might have been attractive the first week might become overshadowed by other applicants further down the road. Sometimes, applicants who I ignored become relevant to a new position that opens up as an web app becomes more robust and takes a turn in a direction I didn't consider. These are all difficult to track. Knowing that recruiting intelligent people should be an ongoing process, what are the best web applications for managing the process? Are there any apps with features catered specifically towards tech startups? (Free or paid, doesn't matter).

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  • How do i start with Gomoku?

    - by firstTry
    I read about Gomoku that it can be implemented using Minimax and Alpha-Beta Pruning algorithms. So, i read these algorithms and now understand how the game will be solved. But when i sat to down to code, I am facing problem how to approach it. As in , How to design the prototype functions like getNextMove or Max(Move) ? How will the next move searched? Till when should i apply the minimax algorithm. I know i can find the code online, but i want to do it myself. Can anyone please point me in the right direction?

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