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• scikit learn extratreeclassifier hanging

  - by denson

  I'm running the scikit learn on some rather large training datasets ~1,600,000,000 rows with ~500 features. The platform is Ubuntu server 14.04, the hardware has 100gb of ram and 20 CPU cores. The test datasets are about half as many rows. I set n_jobs = 10, and am forest_size = 3*number_of_features so about 1700 trees. If I reduce the number of features to about 350 it works fine but never completes the training phase with the full feature set of 500+. The process is still executing and using up about 20gb of ram but is using 0% of CPU. I have also successfully completed on datasets with ~400,000 rows but twice as many features which completes after only about 1 hour. I am being careful to delete any arrays/objects that are not in use. Does anyone have any ideas I might try?

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• How to get the line number an xml element is on via the Java w3c dom api

  - by Benju

  Is there a way to lookup the line number that a given element is at in an xml file via the w3c dom api? My use case for this is that we have 30,000+ maps in kml/xml format. I wrote a unit test that iterates over each file found on the hard drive (about 17GB worth) and tests that it is parseable by our application. When it fails I throw an exception that contains the element instance that was considered "invalid". In order for our mapping department (nobody here knows how to program) to easily track down the typo we would like to log the line number of the element that caused the exception. Can anybody suggest a way to do this? Please note we are using the W3C dom api included in the Android 1.6 SDK.

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• QR Factorization Discrepancy

  - by KyleSum

  I'm trying to get a feel for the Intel MKL library with a simple back-solve (A*x = b) using a QR factorization and comparing my MKL answer to the answer of a known working solution. When my answers didn't come up correct I printed a diff between the Q and R matrices of the known working and the MKL test code. I know MKL/lapack uses "elementary reflectors" to store the values of both the Q and R matrices. So, I'm wondering if these differences (mostly +/-) are by design or the result of some bug. I'm using DGEQRF, DORMQR, and DTRSM routines to solve the system and DORGQR (for debugging) to get the Q matrix shown in the diff. diff with 6x6 matrix (top known, bottom mkl): http://pastebin.com/4uwcME0J

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• kCGImagePropertyIPTCKeywords problem

  - by deepa

  Hi, I am developing an iPhone app in which I want to set the keywords for an image using ImageIO.framework. Following is the code snippet that I use for setting the keywords. But, it does not apply the keywords to image meta data. Could some one help me out in finding the problem here. NSMutableDictionary *iptcDictionary = [NSDictionary dictionaryWithObject: [NSArray arrayWithObject: @"Test"] forKey:(NSString *)kCGImagePropertyIPTCKeywords]; NSDictionary *newImageProperties = [NSDictionary dictionaryWithObject:iptcDictionary forKey:(NSString *)kCGImagePropertyIPTCDictionary]; CGImageSourceRef imageSource=CGImageSourceCreateWithURL((CFURLRef)imageURL, nil); //imageURL is URL of source image CGImageDestinationRef imageDestination = CGImageDestinationCreateWithData( (CFMutableDataRef)newImageFileData, CGImageSourceGetType(imageSource), 1,NULL); CGImageDestinationAddImageFromSource(imageDestination, imageSource, 0, (CFDictionaryRef) newImageProperties); if (CGImageDestinationFinalize(imageDestination)) [newImageFileData writeToFile:imagePath atomically:YES]; //imagePath is the path of the destination image with new metadata Thanks and regards, Deepa

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• How to Replace only Part of the Variable using #define

  - by mahesh

  #define C_TX_ TX_ #define C_RX_ RX_ enum Test { C_TX_MAC 0x0100, // Pre-Processor should replace C_TX_ to TX_ C_RX_MAC 0x0101 // But Not Working. }; int main(int argc, char *argv[]) { cout << TX_MAC; // HOW TO PRINT ? cout << RX_MAC; // HOW TO PRINT ? return true; } Please Help. Thanks in Advance

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• dll runtime error(C/C++/GCC/MSVC)

  - by coanor

  After two days fighting, I make the dll(compiled in GCC/G++) link correctly in MSVC, but while debuging, I got the runtime error, is say that: Runtime Error! Program: my_exe.exe This application has required the Runtime to terminate it in an unusual way. Please contact the application's support team for more information. I have test something in that way: compiled a dll in mingw/gcc, link and debug in MSVC, it works correctly ,but while I implement it in my large project, I got the runtime error. And I tested the dll in mingw/GCC, it works correctly, it says that the runtime error does not come from programming error,it comes from the dll imcompatible between different platform. Does anyone can hele me? Thanks, forgive my poor English.

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• In OCaml, how can I create an out_channel which writes to a string/buffer instead of a file on disk

  - by Tianyi Cui

  I have a function of type in_channel -> out_channel -> unit which will output something to an out_channel. Now I'd like to get its output as a string. Creating temporary files to write and read it back seems ugly, so how can I do that? Is there any other methods to create out_channel besides Pervasives.open_out family? Actually, this function implemented a repl. What I really need is to test it programmatically, so I'd like to first wrap it to a function of type string -> string. For creating the in_channel, it seems I can use Scanf.Scanning.from_string, but I don't know how to create the out_channel parameter.

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• Sitemap Links don't work on live site, Windows Authentication

  - by Chris

  I have a intranet site with Windows Authentication. I have 'Administrator' pages in an 'Administrator' folder that will only show for those in the admin group (windows security group) These pages work I have a folder with sub folders containing reports. These permissions are broken down for each type of report. They have similar role priveleges. When I test the application, I can navigate to the pages. When I deploy the site live on the intranet the links don't return a page. Error missing link 404. Do I need to set something in IIS?

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• python mock side_effect or return_value dependent on call_count

  - by user18380

  To test a polling function I want to mock the calling of a sub function so that the first time it is called it will fail, and the second time it is called it will succeed. Here's a very simplified version of it: poll_function(var1): value = sub_function(var1) # First call will return None while not value: time.sleep(POLLING_INTERVAL) value = sub_function(var1) # A subsequent call will return a string, e.g "data" return value Is this possible to do with a Mock object from the mock framework? I know Mock objects have a call_count attribute I should be able to use somehow. Right now I've solved it by creating a custom mock object that I use to monkey patch sub_function(), but I feel there should be a better less verbose way of doing it: def test_poll(): class MyMock(object): def __init__(self, *args): self.call_count = 0 def sub_function(self, *args, **kwargs): if self.call_count > 1: return "data" else: self.call_count += 1 return None my_mock = MyMock() with patch('sub_function', my_mock.sub_function): ok_(poll_function())

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• What are the parts that a good C++ project should contain? (Docs, Makefile, Tests etc...)

  - by mr.bio

  Hi there , i am writing my bachelor thesis and there is some C++ code attached to it. I want to have a nice clean Project. So what should be in it ? I think : Documentation in html ( generated with Doxygen) README File Makefile ( which make ? CMake ? ) Unit-Tests ( which unit test framework? ) Copyright Text ? ... Did i miss something ?

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• python - selenium script syntax error

  - by William Hawkes

  Okay, I used selenium to test some automation, which I got to work. I did an export of the script for python. When I tried to run the python script it generated, it gave me a "SyntaxError: invalid syntax" error message. Here's the python script in question: from selenium import selenium import unittest, time, re class WakeupCall(unittest.TestCase): def setUp(self): self.verificationErrors = [] self.selenium = selenium("localhost", 4444, "*chrome", "http://the.web.site") self.selenium.start() def test_wakeup_call(self): sel = self.selenium sel.open("/index.php#deposit") sel.wait_for_page_to_load("30000") sel.click("link=History") sel.wait_for_page_to_load("30000") try: self.failUnless(sel.is_text_present("key phrase number 1.")) except AssertionError, e: self.verificationErrors.append(str(e)) The last line is what generated the "SyntaxError: invalid syntax" error message. A "^" was under the comma. The rest of the script goes as follows: def tearDown(self): self.selenium.stop() self.assertEqual([], self.verificationErrors) if name == "main": unittest.main()

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• Will an optimizing compiler remove calls to a method whose result will be multiplied by zero?

  - by Tim R.

  Suppose you have a computationally expensive method, Compute(p), which returns some float, and another method, Falloff(p), which returns another float from zero to one. If you compute Falloff(p) * Compute(p), will Compute(p) still run when Falloff(p) returns zero? Or would you need to write a special case to prevent Compute(p) from running unnecessarily? Theoretically, an optimizing compiler could determine that omitting Compute when Falloff returns zero would have no effect on the program. However, this is kind of hard to test, since if you have Compute output some debug data to determine whether it is running, the compiler would know not to omit it because of that debug info, resulting in sort of a Schrodinger's cat situation. I know the safe solution to this problem is just to add the special case, but I'm just curious.

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• Jquery Accordion and multiple slideshows

  - by Dipesh Parmar

  I've been using a lot of slideshows recently on my sites and one thing thats puzzled me is using more than one slideshow per page. I'm currently working on my own site, experimenting with Jquery Accordion. I've managed to adopt a very simple javascript slideshow, see below: http://dvpwebdesign.com/test/accordion/blank.html However i'm unable to either incorporate or use a different multiple slideshow plugin. I dont need slideshow navigation, so the The Cycle plugin works really well and i know you can use multiple slideshows. But if i either use Cycle alongside the current javascript slideshow, or only use the Cycle slideshow to avoid any possible conflict, the Accordion menu stops working. I just cant see what i am doing wrong, can anyone help?

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• Insert Statment with Case for avoid duplicate record insertion

  - by rama

  I have written the below SP for Precheck for Duplicate records before insert into Table . but it is not allow me yo write insert staement inside the CASE . how can I write Stored Procedure for fist Check the value @Ordername into table After that if it is not present then it should inserted into Database . CREATE PROCEDURE [Test Procedure ] ( @section varchar(70), @mark varchar(70), @qty decimal(18,2), @Weight decimal(18,2), @dateupdateremark int, @OrderName varchar(70) ) AS BEGIN SET NOCOUNT ON; select case(@OrderName) when (select OrderName from dbo.tbl_insertxmldetails where(@OrderName) not in (select OrderName from tbl_insertxmldetails)) then insert into dbo.tbl_insertxmldetails (Section, Mark, QTY,Weight,Dateupdateremark ,OrderName,SystemDate) values (@Section, @Mark, @QTY,@Weight, @Dateupdateremark,@OrderName,GETDATE()) else 'File already Exists' end

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• iPhone: Try to send html code to a php script (but fail)

  - by Marc-André Weibezahn

  Hello all, I am trying this for an iPhone app in Xcode: create html code for a website on the fly sending it to a php-script and getting the response with this code: NSError * error = [[[NSError alloc]init]autorelease]; NSURL * phpURL = [NSURL URLWithString: @"http://www.mydomain.com/myscript.php?mywebsite= (...websitestring...) ];NSString * myResponse = [NSString stringWithContentsOfURL:phpURL encoding:NSUTF8StringEncoding error:&error]; It does not work. It should not be a problem of the php code because when I replace the websitestring which contains the html code with "hello" or something, this is accepted. (the script then creates a file "test.html" with the content I sent.) But when I put html code in it, I always get the error: Error Domain=NSCocoaErrorDomain Code=256 "The operation couldn’t be completed. (Cocoa error 256.)" UserInfo=0x322ec10 {} It seems that there are some things to consider when sending code to php? Thanks in advance!

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• String formatting [str.format()] with a dictionary having a key which is a str() of a number

  - by decimus phostle

  Python neophyte here. I was wondering if someone could help with the KeyError I am getting when using a dictionary for string interpolation in str.format. dictionary = {'key1': 'val1', '1': 'val2'} string1 = 'Interpolating {0[key1]}'.format(dictionary) print string1 The above works fine and yields: Interpolating val1 However doing the following: dictionary = {'key1': 'val1', '1': 'val2'} string2 = 'Interpolating {0[1]}'.format(dictionary) print string2 results in: Traceback (most recent call last): File "test.py", line 3, in <module> string2 = 'Interpolating {0[1]}'.format(dictionary) KeyError: 1L So the problem seems to be in the interpretation of the numeric key as a list index, IMHO. Is there any way to work around this? (i.e. convey that this is instead a dictionary key) TIA and apologies if this question has been asked before(couldn't find anything relevant with my search-fu).

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• OpenGLES iPhone Depth Blending problem

  - by user359103

  Hi, I am trying to make an OpenGLES 2.0 cube application. The idea was to have a texture (with an alpha 75%) applied to all 6 faces of the cube. This would mean that even if I rotate the cube i would be able to see all 6 faces at any given frame. Now I have enabled depth test(my app needs this!!) and blending. The Depth func is LEQUAL and blend func is SRC_ALPHA, ONE_MINUS_SRC_ALPHA. Now, the issue is that at some cube faces don't show the underlying faces. I am not able to understand this because the logic works fine with the other cube faces. Just for the record, I have disabled CULL_FACE. Thanks in advance. Regards, Puzzler

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• file_get_contents returns an empty string that is 354 bytes long.

  - by Kendall Crouch

  I'm trying to read the contents of a file and simply getting an empty string. The file exists on the server. I've tried some test with the following code and get the true to display: $filename = "includes/blah.php"; $filecontents = file_get_contents($filename, FILE_USE_INCLUDE_PATH); if ($filecontents === false) { echo(":FALSE:"); } else { echo(":TRUE:"); } var_dump($filecontents); The dump displays "string(354)" which is the correct size of the file. What am I doing wrong?

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• what is the correct way to close a socket in python 2.6?

  - by davidshen84

  hi, i have a simple server/client. and i am using the netcat as the client to test the server. if i stop the server before the client exit, i will not be able to start the server again for a while and i go this error: " [Errno 98] Address already in use " but if i close the client first, then the server stops, i will not have this issue. my server socket works like this: try: s=socket s.bind(..) s.listen(1) conn,addr=s.accept() finally: conn.close() s.close() it feels to me that the server did not close the socket properly. but i do not know how to fix this.

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• html/php: how to handle absolute url's?

  - by YuriKolovsky

  Is the html tag safe to use in terms of browser support? Or should I generate a root path with PHP which i then add like this <a href="<?=BASE?>somepage.html">somepage</a> which makes up a absolute url. using the base tag like this <base href="<?=BASE?>" /> I am then able to use links like this <a href="somepage.html">somepage</a> now I am fully aware that it would be much easier to just do this without using the base tag: <a href="/somepage.html">somepage</a> but how do I test locally then with a base url of http://localhost/testsite/ ???

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• Editing PHP using PHP (admin center)

  - by Alec Smart

  Hello, Am developing an admin center where I can edit configuration files (written in PHP). I do NOT want to store these values in a mySQL table (for various reasons). So say my config.php has contents like: <?php $option1 = 1; $option2 = 2; $option4 = 5; $option7 = array('test','a','b',c'); ?> Now say in one of the admin pages I will only be changing a few values like option2 or option4 etc. Any ideas on what would be the best way to go about this. I know one option is to read the PHP file completely and write parts of it using REGEX. Any way to make this more efficent? I don't want the config.php file to break because of some error on the user's end. Any ideas on how to ensure that it works?

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• Hudson + gitolite + virtual host on staging server

  - by takeshin

  I have a Ubuntu server which I want to be my continous integration server (for the Zend Application based projects) and the staging server as well. The team is pushing source files to the repository: /home/git/repositories/testing.git Then Hudson does the build, and the master branch is exported (maybe cloned is a better word) by git hudson plugin to: /var/lib/hudson/jobs/test/workspace/ The workspace contains .git folder as well, which is not necessary on my staging website. How do you set up virtual host to see the staging version of the content of the repository? Does the virtual host point to the workspace, or shall I export the files to another directory? What about the permissions and security? Hudson is the owner of all the workspace files. Do I have to do some post-build actions to set up access? P.S. If this question is more apropriate to serverfault, please migrate.

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• String vectors not working as expected with newline and iterators? (C++)

  - by kevin

  I have a text file made of 3 lines: Line 1 Line 3 (Line 1, a blank line, and Line 3) vector<string> text; vector<string>::iterator it; ifstream file("test.txt"); string str; while (getline(file, str)) { if (str.length() == 0) str = "\n"; // since getline discards the newline character, replacing blank strings with newline text.push_back(str); } // while for (it=text.begin(); it < text.end(); it++) cout << (*it); Prints out: Line 1 Line 3 I'm not sure why the string with only a newline was not printed out. Any help would be appreciated. Thanks.

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• Struts2 property tag escapeHtml is not working am I missing something?

  - by user1073570

  The following code is not working correctly. I would like to take the following Java String from the bean String statusMsg = "Hello World! <br/><br/><h3>Test</h3>" And output it with the HTML tags not escaped. <s:property escapeHtml="false" value="bean.statusMsg" The result of this property Tag and String, is that the HTML tags are still being escaped, am I missing something? My goal is to eventually build a table of status data and output it on the page is this the wrong way to use the property tag? Thank you in advance for your help.

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• Connect to Oracle 11g using VS2010.net Drivers/Cleints

  - by StealthRT

  Hey all i am trying to redistribute my app that uses Oracle 11g: Imports Oracle.DataAccess.Client The problem i am having is that it will not run on a machine that doesnt seem to have the correct drivers that its looking for. When i install ODAC 11.2 Release 3 (11.2.0.2.1) with Oracle Developer Tools for Visual Studio on the test VM it works just fine but thats a 230+mb file to download and install! Not to mention that if the user already has Oracle 10/11g on their machine that it may mess up their current connections/etc by installing that setup file. Is there another setup package that i can install that only has the Oracle Data Provider for .NET 2.0 11.2.0.2.0 or whatever its needing from that ODAC 11.2 Release 3 file. So any help about what i need to go about fixing this problem would be great! :) Thanks, David

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