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  • What is the best way to run a loop of regressions in R?

    - by stevejb
    Assume that I have sources of data X and Y that are indexable, say matrices. And I want to run a set of independent regressions and store the result. My initial approach would be results = matrix(nrow=nrow(X), ncol=(2)) for(i in 1:ncol(X)) { matrix[i,] = coefficients(lm(Y[i,] ~ X[i,]) } But, loops are bad, so I could do it with lapply as out <- lapply(1:nrow(X), function(i) { coefficients(lm(Y[i,] ~ X[i,])) } ) Is there a better way to do this?

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  • FB Developer: Capture POST variables after multi-friend-selector

    - by Faruz
    Using this: http://stackoverflow.com/questions/820421/can-i-use-facebooks-fbfriend-selector-in-an-iframe I created a multi-friend selector in my IFRAME FB application. I want to know if the user selected any users for invite so I can reward him with extra points. In the developer WIKI I saw that [ids] is transferred to requested page via POST. But how I can capture the values if I'm using JS/.NET? (Preferably through .NET so I can easily save values in the DB).

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  • How to approach performance issues?

    - by jess
    Hi, We are developing a client-server desktop application(winforms with sql server 2008, using LINQ-SQL).We are now finding many issues related to performance.These relate to querying too much data with LINQ , bad database design,not much caching etc.What do you suggest,we should do - how to go about solving these performance issues? One thing,I am doing is doing sql profiling,and trying to fix some queries.As far caching is concerned,we have static lists.But,how to keep them updated,we don't have any server side implementation.So,these lists can be stale,if someone changes data. regards

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  • Will GTK's pango and cairo work well in Coca and MFC applications.

    - by Lothar
    I'm writing a GUI program and decided to go native on all platforms. But for all the stuff i need to draw myself i would like to use the same drawing routines because font and unicode handling is so difficult and complex. Do you see any negative points in useing Pango/Cairo. Well on MacOSX i havent succeded installing Pango/Cairo yet. Looks like a bad Omen.

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  • storing HTML5 webdatabase table data to sql server periodically

    - by DotnetSparrow
    I want to read data from html5 web database and post to sql server using vb.net server side. I have used following link as reference: http://www.html5rocks.com/en/tutorials/webdatabase/todo/ I have created a web database and created table and stored some data in it. Now I want to store this data to sql server. How to get the data from html 5 web database and post to sql server each hour ( using some js timer). Please suggest solution

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  • Any way to cache WAV files in IE?

    - by Dan Howard
    I'm seeing an issue with our web application. We have a few wave files which we can play (like ding.wav) and we have attempted to pre-load wave files but using Fiddler we're seeing that the WAV files are never cached like (js and css and image files). We always see an HTTP 200 instead of an HTTP 304. Any ideas on how to tell IE that it should cache wav files? We're inserting a div: <EMBED SRC='ding.wav' AUTOSTART='FALSE' HIDDEN='TRUE'>

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  • Guidelines for calling controller methods in helper modules?

    - by keruilin
    Few questions: Is it possible to call a controller method in a helper module (e.g., application helper)? If so, how does the helper handle the rendering of views? Ignore it? In what instances would you want to call a controller method from a helper? Is it bad practice? Do you have any sample code where you're calling controller methods in helper?

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  • Determining when scrolled to bottom of a page with Javascript

    - by chimerical
    I'm trying to determine when I've scrolled to the bottom of the page (without using any JS library), but so far, I'm a bit confused over which one of the following to use. The most promising one I've seen is window.scrollY, but even when scrolled to the bottom of the page, it never matches the value of window.innerHeight. What's the best way to do this? window.innerWidth window.innerHeight window.outerWidth window.outerHeight window.scrollX window.scrollY document.body.scrollWidth document.body.scrollHeight document.body.scrollTop document.body.scrollLeft document.body.offsetTop document.body.offsetLeft document.body.offsetWidth document.body.offsetHeight

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  • jquery media conflict with swfobject

    - by Adi
    Hi, If I use jquery media plugin WITH swfobject 2.2 I get an 'unknown runtime error' in IE. It works fine in FF and other browsers. If i remove swfobject.js then the media works fine as it loads using simple object/embed tags. But I need to use swfobject as well (for other things). Has anybody come across this or a fix? A.

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  • Somewhere to download CSS coverflow?

    - by Mark
    This is my favorite coverflow: http://paulbakaus.com/lab/js/coverflow/ Is there some way to download this? Or is there an implementation guide? All I see are some blog posts with nothing on how to implement. Thanks.

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  • Javascript, language files, configuration

    - by johnnyArt
    I'm building a form validation script for one of my sites, and I thought I'd make the error messages international, meaning that depending on the users language I'd give such or such response. What would the best approach be, for loading a configuration file inside of my class? Right now I'm using the following structure for a single language: const config = { 'errorName' : 'error message', 'errorName2' : 'error message', 'errorName2' : 'error message' } And calling it like this of course: config['errorName']. But I don't know how to load those variables from a file, let's say 'lang/en.js'

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  • What is the worst code you've ever written?

    - by Even Mien
    Step into the confessional. Now's your time to come clean. What's the worst code you personally have ever written? Why was it so bad? What did you learn from it? Don't tell us about code you inherited or from some co-worker. This is about your personal growth as a programmer and as a person.

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  • validation using jquery

    - by fusion
    i'm trying to validate an html page using jquery, but nothing happens. it's a simple page, yet the textboxes aren't validated. this is the code: <link rel="stylesheet" type="text/css" href="style.css" /> <script type="text/javascript" src="~/jquery.js/"></script> <script type="text/javascript" src="~/jquery-validate/jquery.validate.js/"></script> <script type="text/javascript"> $(document).ready(function(){ var validator = $("#submitForm").validate({ debug: true, rules: { author: "required", quote: "required" }, messages: { author: "Name of Author required" quote: "Please enter Quote" }, errorPlacement: function(error, element) { error.appendTo( element.parent().top() ); } ); }); </script> <body> <div class="container"> <div class="center_div"> <h2>Submit Your Quote</h2> <fieldset> <form id="submitForm" action="qinsert.php" method="post"> <div class="error" style="display:none"></div> <div class="field"> <label>Author: </label> <input name="author" type="text" class="required" minLength=3> <span class="error"></span> </div><br /> <div class="field"> <label>Quote: </label> <textarea name="quote" cols=22 class="required" minLength=5></textarea> <span class="error"></span> <br /> </div> <input id="button1" type="submit" value="Submit" class="submit" /><br /> <input id="button2" type="reset" value="Reset" /> </form> </fieldset> </div> </div> what is wrong with the code? thank you!

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  • .NET: Avoidance of custom exceptions by utilising existing types, but which?

    - by Mr. Disappointment
    Consider the following code (ASP.NET/C#): private void Application_Start(object sender, EventArgs e) { if (!SetupHelper.SetUp()) { throw new ShitHitFanException(); } } I've never been too hesitant to simply roll my own exception type, basically because I have found (bad practice, or not) that mostly a reasonable descriptive type name gives us enough as developers to go by in order to know what happened and why something might have happened. Sometimes the existing .NET exception types even accommodate these needs - regardless of the message. In this particular scenario, for demonstration purposes only, the application should die a horrible, disgraceful death should SetUp not complete properly (as dictated by its return value), but I can't find an already existing exception type in .NET which would seem to suffice; though, I'm sure one will be there and I simply don't know about it. Brad Abrams posted this article that lists some of the available exception types. I say some because the article is from 2005, and, although I try to keep up to date, it's a more than plausible assumption that more have been added to future framework versions that I am still unaware of. Of course, Visual Studio gives you a nicely formatted, scrollable list of exceptions via Intellisense - but even on analysing those, I find none which would seem to suffice for this situation... ApplicationException: ...when a non-fatal application error occurs The name seems reasonable, but the error is very definitely fatal - the app is dead. ExecutionEngineException: ...when there is an internal error in the execution engine of the CLR Again, sounds reasonable, superficially; but this has a very definite purpose and to help me out here certainly isn't it. HttpApplicationException: ...when there is an error processing an HTTP request Well, we're running an ASP.NET application! But we're also just pulling at straws here. InvalidOperationException: ...when a call is invalid for the current state of an instance This isn't right but I'm adding it to the list of 'possible should you put a gun to my head, yes'. OperationCanceledException: ...upon cancellation of an operation the thread was executing Maybe I wouldn't feel so bad using this one, but I'd still be hijacking the damn thing with little right. You might even ask why on earth I would want to raise an exception here but the idea is to find out that if I were to do so then do you know of an appropriate exception for such a scenario? And basically, to what extent can we piggy-back on .NET while keeping in line with rationality?

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  • Why won't anyone accept public fields in C#?

    - by Dmitri Nesteruk
    Seems like every C# static analyzer wants to complain when it sees a public field. But why? Surely there are cases where a public (or internal) field is enough, and there is no point in having a property with its get_ and set_ methods? What if I know for sure that I won't be redefining the field or adding to it (side effects are bad, right?) - shouldn't a simple field suffice?

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  • Any good, free ftp client?

    - by paan
    I've been using the free naggy version of Smart FTP for a while. It's very good, but then it became shareware only. So I was wondering, are there any other good FTP clients for Windows? The ones I tried but didn't like was: CoreFTP FileZilla (this one was especially bad :( )

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  • Looking for a visualization and charting package

    - by Jeff Meatball Yang
    I have some specific requirements, with the most important at the top: Can plot line and stacked bar charts Can customize mouse events (hover, click) on chart data Compatible and performant with IE7/8 (likely will use excanvas.js) Can optionally control label formats, legends, colors Open source preferred, or at least can purchase the source Can be hosted locally I have seen a couple potentially good ones: Google's interactive charts (But code must be accessed via Google servers) EJSChart Flot Does anyone have experience with these, or others, and can make a recommendation?

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  • How to convert a HTMLElement to a string

    - by Turtle
    Hi, I am going to create an xml element in javascript to exchange data with server side. I found I can do it with document.createElement.But I do not know how to convert it to string. Is there any API in browser to make it easier? Or is there any js lib incudling this API? Thanks in advance.

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  • jQuery, checking to see if video has height/width

    - by Mark
    I have a <video> element that is generated by js, and I need to get the height and width of it. var v = $('video'); v.height() returns null, because when it's run, the video hasn't yet been loaded, so no dimensions in the DOM. How do I check to see if the video has received a dimension, and if it hasn't, wait till it has to get the height and width. Thanks.

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  • Filtering out page content with AJAX in Sitecore

    - by RaYell
    I have a page in Sitecore that displays the list of clients. There's a form with two select boxes that should filter out clients not matching specified criterias. Clients list should be refreshed via AJAX everytime user changes one of the values in the form or after clicking Submit button if JS is disabled. What is the suggested approach I should take to have this working in Sitecore? I'm not sure about Sitecore part, I know how to call AJAX methods/

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