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• No network upsets gnome

  - by Darren Cook

  An issue that has been bothering me for over a year now. My notebook, running ubuntu 10.04, is almost all the time using a wired connection, with static IP address. And a remote DNS server. Network is configured with entries in /etc/network/interfaces and /etc/resolv.conf, rather than whatever the gnome UI tool was (*) But if I'm out, or simply unplug the network cable, a few things get weird. Specifically the gnome-panel stops working - it is still there, but isn't updating. And opening a nautilus window (e.g. to look at files on the local disk) has huge time-outs. By that I mean it will not open the window for something like 30 or 60 seconds; but when it does finally open it I can see the files and it is perfectly usable. Everything else works fine, alt-tab between windows, etc. I use the commandline to find the pid of gnome-panel, kill it, wait a couple of seconds, and it opens up a fresh panel which is normally usable. (Something like 10 minutes later it will have locked/crashed again; the same for the nautilus windows.) I'm guessing this is a DNS issue? Would setting up a local DNS server help? Guess number 2 was related to having a file server mount (samba, though running on another linux box), and symbolic links to files and directories on that file server on my desktop. My question is a bit vague... Does anyone recognize these symptoms, and have a suggestion? Or do you have some troubleshooting suggestions for narrowing down the problem? My /etc/hosts: 127.0.0.1 localhost 127.0.1.1 myhost # The following lines are desirable for IPv6 capable hosts ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts 127.0.0.1 testsite.local #Other test website URLs here UPDATE: Some timings to open some desktop folder icons. This is after pulling out the network cable. A sub-directory of the desktop took 23 secs to open up. Content appears immediately (just 8 files, it has no further subdirectories). The home directory icon took 12 seconds to open up, but then took about 30 seconds for the files to appear. I closed it and tried again. This time it took 18 seconds to open up, but then 70 seconds before anything appeared. *: I couldn't work out how to use the gnome network tool for my needs, which include 3-4 static IPs for testing virtual hosts locally.

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• Should root ever own files in my (linux) home directory?

  - by Darren Cook

  This question started off asking why my history file wasn't working properly. Then I noticed it was -rw------- 1 root root and hadn't been updated since 2012-09-11. I changed the ownership, problem fixed. But now I see some other files are owned by root: .gitconfig .pearrc .viminfo Can I safely change them to be owned by my normal user, not root? I'm scratching my head trying to work out if there is a downside, or a security consequence. Losing seven weeks history is actually quite painful, because I lean on it a lot (e.g. to remind how I last did an archive). Would it be reasonable to set up a cron job to email me if it finds any files in my home directory owned by anyone else but me? Rephrased: is there ever a good reason for root to own a file in my home directory?

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• How to set up an SSL Cert with Subject Alternative Name

  - by Darren Oster

  To test a specific embedded client, I need to set up a web server serving a couple of SSL (HTTPS) sites, say "main.mysite.com" and "alternate.mysite.com". These should be handled by the same certificate, with a Subject Name of "main.mysite.com" and a Subject Alternative Name of "alternate.mysite.com". This certificate needs to be in an authority chain back to a 'proper' CA (such as GoDaddy, to keep the cost down). My question is, are there any good tutorials on how to do this, or can someone explain the process? What sort of parent certificate do I need to purchase from the CA provider? My understanding of SSL certificates is limited, but as Manuel said in Fawlty Towers, "I learn...". I'm happy to work in Windows (IIS) or Linux (Apache) (or even OSX, for that matter). Thanks in advance.

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• Install multiple PHP environments on OS X Snow Leopard

  - by Darren Newton

  I just upgraded my MBP to Snow Leopard (OS X 10.6), which took PHP to 5.3 This is great, except I use my MBP as my development machine and I use a lot of PHP libs and frameworks (namely CakePHP 1.2) which are not compatible at the moment with PHP 5.3. CakePHP in particular does not have a stable version for PHP 5.3 so its not a matter of upgrading the framework (and the production servers are under PHP 5.2 anyway.) Is there a way to install PHP 5.2.9 alongside PHP 5.3 and then using httpd.conf or .htaccess tell Apache which version of PHP to use for a particular directory? Alternatively is there a way to do this with MacPorts? Thanks!

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• Track kids browsing history even when they know how to clear it manually

  - by Darren Newton

  I have a colleague with two teenage boys (yes, cue cliche's about 'I have this friend see...') He's currently having issues with them browsing pr0n and wants to do a little spying on their browsing (I'm staying clear of the philosophies/ethics on this.) The kids are savvy enough to clear their browsing history when they're done. As I'm his goto for IT he has asked me if there is a way to keep a hold of the browsing history. The family uses Macs, and the kids surf with Safari. I know that browsing history is kept here ~/Library/Safari/History.plist. I figure there should be a way to write either an AppleScript or other script (Python/Ruby/Bash) that can backup this file to a different location (/opt/local/history, etc.) Since the kids know to clear their history when they're done should the file be periodically backed up with something similar to a cron job or something like Hazel? While that could work it seems like it would create a ton of little incremental backups. Or is it possible to 'watch' ~/Library/Safari/History.plist and incrementally add changes to a backup file (saving a diff so to speak) but not lose any data? Any ideas/solutions appreciated. UPDATE/EDIT: Got the word from concerned dad that the oldest uses Firefox on a different PC, so the OpenDNS solution (preferably at the router level) is the best answer so far as it would capture usage for the whole house.

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• Take a psd and export all the layers into separate image files without using Photoshop

  - by Darren

  This is my first question here and I'm not sure if this is the appropriate site for my question, but here it goes. If this is not the correct site, please direct me to the correct one. I have a psd file. I simply want to extract the layers from it into separate image files. I do not have Photoshop and I've already used up the free Photoshop trial. I am running Mountain Lion on a MacBook Pro. I have installed Gimp, but I can't figure out how to do what I want. I have searched using Google, but have been completely unable to find a tutorial showing me how to do this. I would really appreciate instructions or a link to an appropriate tutorial. I have seen some answers here, but they simply say use Gimp, which doesn't help me.

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• Configure X connections over TCP without using an X connection

  - by Darren Cook

  I want to run a GUI application on a remote machine I only have ssh access to. I don't need to, or want to, see the GUI window. (I know I could use something like ssh -C -X remote_server if I wanted the GUI to be on my client.) I know X is running on the remote machine, as ps shows this: root ... /usr/bin/Xorg :0 -br -audit 0 -auth /var/gdm/:0.Xauth -nolisten tcp vt7 I set DISPLAY=:0.0 but I then get "Xlib: connection to ":0.0" refused by server" when I try to use it. At Get remote x display working in linux without ssh tunneling and Xserver doesn't work unless DISPLAY=0.0 I see the advice to use gdmsetup to allow X to listen on TCP. But, gdmsetup is a GUI application! And trying to run it over ssh -X did not work ("X11 connection rejected because of wrong authentication"). So, is there a text file I can edit to remove -nolisten? And, after editing it, how do I safely restart X, remotely? (There is other stuff running on this machine, so requesting a reboot is possible, but undesirable.) If not, should gdmsetup be able to run over ssh and I should persevere in that direction? UPDATE: I had to do the ssh -X session as root (ssh as a normal user, then sudo or su, does not work.) So, I did the edit with gdmsetup. I then restarted X with gdm-restart. I've also done xhost + from that ssh -X session. The ps line no longer shows the -nolisten tcp part. But still no luck connecting to it, with either DISPLAY=:0 or DISPLAY=localhost:0

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• How to write to Samba folder?

  - by Darren

  I created a Samba share on my CentOS machine and I can connect to the share and read the contents but I cannot write files to it or delete them. In Samba I have set readable to yes and writeable to yes, as well as made the folder I want to access apart of the wheel group of which I added the user that is accessing it from Samba. The folder in quesiton is /var/www/. I have set that folder and all folders under it to the wheel group which can read and write to it. What am I doing wrong here?

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• How to write to Samba folder?

  - by Darren

  Hi all, I created a Samba share on my CentOS machine and I can connect to the share and read the contents but I cannot write files to it or delete them. In Samba I have set readable to yes and writeable to yes, as well as made the folder I want to access apart of the wheel group of which I added the user that is accessing it from Samba. The folder in quesiton is /var/www/. I have set that folder and all folders under it to the wheel group which can read and write to it. What am I doing wrong here?

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• Uploading User Made Videos to iPhone (from Vista)

  - by Darren E.

  Once a user downloads a video created with the iPhone 3GS and then deletes it from the iPhone, that video cannot be uploaded back to the iPhone...according to Apple. The videos are not treated as Photos and are not allowed to sync to and from the iPhone freely. Has anyone discovered a program or tweek that allows one to upload video to the iPhone? Thanks.

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• How to move a Windows instance to a different EC2 data centre?

  - by Darren Cook

  I've a Windows EC2 instance running in one region and need to move it to another region (Tokyo and Singapore in this case). Is that even possible? What potential problems do I need to watch out for? (I found http://stackoverflow.com/questions/2181849/ec2-instance-cloning which is describing how to do it, but appears to assume Linux instances, and to assume the same data centre. Is it possible to move my keys across to another region?) I tried something similar with a Windows instance a few months ago, just trying to clone it in the same data centre, but I couldn't get it working quickly, so I had to give up and just create a fresh instance at that time. This time I've got a bit of breathing space, and want to research how to do it properly! Root Device Type: ebs Block Devices: sda1 xvdf (both are ebs, "attached", and have Delete on termination set to "no"; sda1 is the root device) The AMI is described as "Unavailable" (then an ami number).

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• Twitter Feeds in Umbraco using XSLT

  - by Vizioz Limited

  There are currently two packages tagged on the Umbraco forum that can be used to add a twitter feed to your website. I was playing around with "Twitter for Umbraco" by Warren Buckley and noticed a bug in the way it converted twitter @names to links, so I thought I would try and solve this using XSLT.It may also be useful for those of you using Darren Ferguson's "Feed Cache" package as the demo on Darren's site does not add links to the tweets.To use this XSLT you simple call the XSLT Template passing in your Twitter message:<xsl:call-template name="formaturl"> <xsl:with-param name="url" select="text"/></xsl:call-template>Then add the XSLT template to your XSLT macro (outside of the main template)<xsl:template name="formaturl"> <xsl:param name="twitterfeed"/> <xsl:variable name="transform-http" select="Exslt.ExsltRegularExpressions:replace($twitterfeed, '(http\:\/\/\S+)',ig,'<a href="$1">$1</a>')"/> <xsl:variable name="transform-https" select="Exslt.ExsltRegularExpressions:replace($transform-http, '(HTTps\:\/\/\S+)',ig,'<a href="$1">$1</a>')"/> <xsl:variable name="transform-AT" select="Exslt.ExsltRegularExpressions:replace($transform-https, '(^|\s)@(\w+)',ig,' <a href="http://www.twitter.com/$2">@$2</a>')"/> <xsl:variable name="transform-HASH" select="Exslt.ExsltRegularExpressions:replace($transform-AT, '(^|\s)#(\w+)',ig,' <a href="http://www.twitter.com/search?q=$2">#$2</a>')"/> <xsl:value-of select="$transform-HASH" disable-output-escaping="yes"/> </xsl:template>You should find that this now replaces all the @names, #names and URL's with links!

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• PDF from Umbraco | Creating PDF case studies from data in the Umbraco CMS

  - by Vizioz Limited

  Last week we launched the first version of our website based on Umbraco 4.5.2 and this week we have just added a bit of extra functionality to the case studies section which enables you to download the case studies as PDF documents.To do this we used the PDF Creator package by Darren Ferguson, this is actually a wrapper around a product from a company called Ibex, which is where you can download documentation for the mark up required.The way Darren has made the implementation is really simple for anyone already familiar with the Umbraco CMS. You simple create a new template and call a Usercontrol macro, this then does the magic in the background and passes an XSLT file to the ibex engine.What you need to be aware of is that you need to learn a new mark up language called XSL-FO this is actually part of the XSL 1.0 specification and is a language used to express print layouts.As an indication of timescale, from knowing nothing about XSL-FO to the finished product that you can see on the website now has taken me 2 days of learning and just fiddling with the mark up to get the final result.If anyone is interested I might post some code snippets to show you how some of it is done, I would also be really interested to have some feedback about the PDF layout and what you like and don't like about it.Cheers,ChrisPosted using BlogPress from my iPad

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• Permission Mystery - apt-get and other system utilities have 000 permissions

  - by emteh

  I'm trying to track down this strange behavoir for years now. Always after installing software-updates the permissions of a lot of system-tools are broken as you can see below. I am reasonable convinced that the machine is not owned by someone else. Regular security updates + grsecurity kernel + pax + daily rkhunter runs. Besides that there is no incentive for an attacker to fiddle in such obvious ways with the system. I installed bastille linux (http://bastille-linux.sourceforge.net/) und tried to deinstall it later, so the problems could be related to that. However I don't see how this can happen in a regular way after updates. System: Ubuntu 10.04, recently updated to Ubuntu 12.04 but the problem persists. Apt-Configuration in /etc/apt/ looks sane to me. But nevertheless - could here be the source of the trouble? DPkg::Pre-Install-Pkgs {"/usr/sbin/dpkg-preconfigure --apt || true";}; DPkg::Post-Invoke { "if [ -x /usr/bin/debsums ]; then /usr/bin/debsums -- generate=nocheck -sp /var/cache/apt/archives; fi"; }; // Makes sure that rkhunter file properties database is updated // after each remove or install only APT_AUTOGEN is enabled DPkg::Post-Invoke { "if [ -x /usr/bin/rkhunter ] && grep -qiE '^APT_AUTOGEN=.? (true|yes)' /etc/default/rkhunter; then /usr/share/rkhunter/scripts/rkhupd.sh; fi" } DPkg::Post-Invoke {"if [ -d /var/lib/update-notifier ]; then touch /var/lib/update- notifier/dpkg-run-stamp; fi; if [ -e /var/lib/update-notifier/updates-available ]; then echo > /var/lib/update-notifier/updates-available; fi "; }; Where do these chmod 000 come from? I'm feeling really uneasy with this problem. root@besen:~# find /usr/bin/ -perm 0 -ls 14721496 196 ---------- 1 root root 192592 Oct 15 11:58 /usr/bin/apt-get 14721144 68 ---------- 1 root root 63848 Sep 13 00:29 /usr/bin/gpasswd root@besen:~# find /usr/sbin/ -perm 0 -ls 1727732 92 ---------- 1 root root 86984 Sep 13 00:29 /usr/sbin/usermod 1727727 64 ---------- 1 root root 57640 Sep 13 00:29 /usr/sbin/userdel 1727719 64 ---------- 1 root root 57680 Sep 13 00:29 /usr/sbin/newusers 1727718 40 ---------- 1 root root 38632 Sep 13 00:29 /usr/sbin/grpunconv 1727728 48 ---------- 1 root root 47088 Sep 13 00:29 /usr/sbin/groupadd 1727724 32 ---------- 1 root root 29584 Sep 13 00:29 /usr/sbin/pwunconv 19031620 84 ---------- 1 root root 81880 Jan 3 2012 /usr/sbin/edquota 14877113 48 ---------- 1 root root 46880 Sep 13 00:29 /usr/sbin/grpck 1727722 40 ---------- 1 root root 38632 Sep 13 00:29 /usr/sbin/pwck 1727730 96 ---------- 1 root root 91464 Sep 13 00:29 /usr/sbin/useradd 19031619 16 ---------- 1 root root 14600 Jan 3 2012 /usr/sbin/quotastats 1727720 44 ---------- 1 root root 42760 Sep 13 00:29 /usr/sbin/groupdel 1727733 36 ---------- 1 root root 34504 Sep 13 00:29 /usr/sbin/pwconv 19031621 80 ---------- 1 root root 77632 Jan 3 2012 /usr/sbin/rpc.rquotad 19030041 76 ---------- 1 root root 73600 Jan 3 2012 /usr/sbin/repquota 1727731 40 ---------- 1 root root 38624 Sep 13 00:29 /usr/sbin/grpconv 1727725 56 ---------- 1 root root 49472 Sep 13 00:29 /usr/sbin/vipw 1727723 64 ---------- 1 root root 57672 Sep 13 00:29 /usr/sbin/groupmod root@besen:~# find /sbin/ -perm 0 -ls 16760927 76 ---------- 1 root root 73464 Jan 3 2012 /sbin/quotaon Any tipps? I really can't pinpoint the problem in more detail. It happens after installing updates but I can't find no hooks in the dpkg/apt system.

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• Add file using SharpSVN

  - by jan

  Hi, I would like to add all unversioned files under a directory to SVN using SharpSVN. I tried regular svn commands on the command line first: C:\temp\CheckoutDir> svn status -v I see all subdirs, all the files that are already checked in, a few new files labeled "?", nothing with the "L" lock indication C:\temp\CheckoutDir> svn add . --force This results in all new files in the subdirs ,that are already under version control themselves, to be added. I'd like to do the same using SharpSVN. I copy a few extra files into the same directory and run this code: ... using ( SharpSvn.SvnClient svn = new SvnClient() ) { SvnAddArgs saa = new SvnAddArgs(); saa.Force = true; saa.Depth = SvnDepth.Infinity; try { svn.Add(@"C:\temp\CheckoutDir\." , saa); } catch (SvnException exc) { Log(@"SVN Exception: " + exc.Message + " - " + exc.File); } } But an SvnException is raised: SvnException.Message: Working copy 'C:\temp\CheckoutDir' locked SvnException.File: ..\..\..\subversion\libsvn_wc\lock.c" No other svnclient instance is running in my code, I also tried calling svn.cleanup() right before the Add, but to no avail. Since the documentation is rather vague ;), I was wondering if anyone here knew the answer. Thanks in advance! Jan

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• question regarding templatization of virtual function

  - by jan

  Hi, I am new to this forum and sorry If I am repeating this question. I know that you cannot templatize the virtual function and I do understand the concept behind it. But I still need a way to get across some errors I am getting it. I am able to make my stuff work but it doesn't look to me. Here's the deal, I have class called System, #include "Vector.h" class System { virtual void VectorToLocal(Vector<T>& global_dir,const Vector<T>* global_pos = 0) const = 0; }; class UnresolvedSystem : public System { virtual void VectorToLocal(Vector<T>& global_dir,const Vector<T>* global_pos = 0) const { //do something } }; In Vector.h tenplate<typename T> class Vector { //some functions }; See now I want to templatize VectorToLocal in system.h to take just Vector, but I cannot do it as it is a virtual function. I want a work around. I know I can have VectorToLocal take Vector, Vector etc as arguments. But I do not want to do it. Any help would be really appreciated. Thanks in advance, Jan

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• NTLM Authentication fails when behind Proxy server

  - by Jan Petersen

  Hi All, I've seen a number of post about consuming Web Services from behind a proxy server, but none that seams to address this problem. I'm building a desktop application, using Java, JAX-WS in NetBeans. I have a working prototype, that can query the server for authentication mode, successfully authenticate and retrieve a list of web site. However, if I run the same app from a network that is behind a proxy server (the proxy does not require authentication), then I'm running into trouble. I have sniffed the traffic, and noticed the following: Behind Proxy # Result Protocol Host URL 1 200 HTTP host.domain.com /_vti_bin/Authentication.asmx 2 401 HTTP host.domain.com /_vti_bin/Webs.asmx 3 401 HTTP host.domain.com /_vti_bin/Webs.asmx 4 401 HTTP host.domain.com /_vti_bin/Webs.asmx 5 401 HTTP host.domain.com /_vti_bin/Webs.asmx Without Proxy # Result Protocol Host URL 1 200 HTTP host.domain.com /_vti_bin/Authentication.asmx 2 401 HTTP host.domain.com /_vti_bin/Webs.asmx 3 401 HTTP host.domain.com /_vti_bin/Webs.asmx 4 401 HTTP host.domain.com /_vti_bin/Webs.asmx 5 401 HTTP host.domain.com /_vti_bin/Webs.asmx 6 200 HTTP host.domain.com /_vti_bin/Webs.asmx When running the code from a network without a proxy server, I successfully Authentication with the server, but when I'm behind the proxy server, the traffic is cut-off at the 5th message, and thus don't succeed. I know from the Java docs that On Microsoft Windows platforms, NTLM authentication attempts to acquire the user credentials from the system without prompting the user's authenticator object. If these credentials are not accepted by the server then the user's authenticator will be called. Given that my Authentication code is called only ones, and only as the 5th attempt, it appears as if the connection is dropped when behind the proxy server before my Authentication object is used. Is there any way I can control the behavior of Authentication module, to not have it use the system credentials? I have put the source text java class files of a demo app up, showing the issue at the following urls (it's a bit to long even in the short demo form to post here). link text Br Jan

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• How can I include a .eps figure within a Tikz simple flow chart?

  - by Jan

  Hi, I would like to create a simple flow chart in latex with the TikZ package similar to the following example http://www.texample.net/tikz/examples/simple-flow-chart/ However I would like to include figures (a time series plot created in R, as eps or something else) within the flowchart (e.g. for example within a {block}? \documentclass{article} \usepackage[latin1]{inputenc} \usepackage{tikz} \usetikzlibrary{shapes,arrows} \begin{document} \pagestyle{empty} % Define block styles \tikzstyle{decision} = [diamond, draw, fill=blue!20, text width=4.5em, text badly centered, node distance=3cm, inner sep=0pt] \tikzstyle{block} = [rectangle, draw, fill=blue!20, text width=5em, text centered, rounded corners, minimum height=4em] \tikzstyle{line} = [draw, -latex'] \tikzstyle{cloud} = [draw, ellipse,fill=red!20, node distance=3cm, minimum height=2em] \begin{tikzpicture}[node distance = 2cm, auto] % Place nodes \node [block] (init) {initialize model}; \node [cloud, left of=init] (expert) {expert}; \node [cloud, right of=init] (system) {system}; \node [block, below of=init] (identify) {identify candidate models}; \node [block, below of=identify] (evaluate) {evaluate candidate models}; \node [block, left of=evaluate, node distance=3cm] (update) {update model}; \node [decision, below of=evaluate] (decide) {is best candidate better?}; \node [block, below of=decide, node distance=3cm] (stop) {stop}; % Draw edges \path [line] (init) -- (identify); \path [line] (identify) -- (evaluate); \path [line] (evaluate) -- (decide); \path [line] (decide) -| node [near start] {yes} (update); \path [line] (update) |- (identify); \path [line] (decide) -- node {no}(stop); \path [line,dashed] (expert) -- (init); \path [line,dashed] (system) -- (init); \path [line,dashed] (system) |- (evaluate); \end{tikzpicture} \end{document} Thanks, Jan

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• is mysql index useful on column 'state' when only doing bit-operations on the column?

  - by Geert-Jan

  I have a lot of domain entities (stored in mysql) which undergo lots of different operations. Each operation is executed from a different program. I need to keep (flow)-state for these entities which I implemented in as a long field 'flowstate' used as a bitset. to query mysql for entities which have undergone a certain operation I do something like: select * from entities where state >> 7 & 1 = 1 Indicating bit 7 (cooresponding to operation 7) has run. (<-- simplified) Anyway, I really didn't pay attention to the performance implications of this setup in the beginning, and I think I'm in a bit of trouble since queries as the above run pretty slow. What I'd like to know: Does an mysql index on 'flowstate' help at all? After all it's not a single value Mysql can quickly find using a binary sort or whatever. If it doesn't, are there any other things I could do to speed things up? . Are there special 'mask-indices' for fields with use-cases as the above? TIA, Geert-jan

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• Java/XML: Good "Stream-based" Alternative to JAXB?

  - by Jan

  Hello Experts, JAXB makes working with XML so much easier, but I have currently a big problem, that the documents I have to process are too large for an in memory unmarshalling that JAXB does. The data can be up to 4GB per document. The datastructure I will have to process is very simple and flat: With a root element and millions of “elements”… <root> <element> _foo </element> <element> _foo </element> </root> May questions are: Does JAXB maybe somehow support unmarshalling in a “streambased” way, that does not require to build the whole objecttree in memory but rather gives me some kind of “Iterator” to the elements, element by element? (Maybe I just missed that somehow…) If not what are your proposals for an good alternative with a a. “flat learningcurve, ideally very similar to JAXB b. AND VERY IMPORTANT: Ideally with the possibility / tool for the generation of the unarshaller code from an XSD file OR annotated Java Class 3.(I have searched SO and those to library that ended up on my “watchlist” (without comparing them closer) were Apache XML Beans and Xstream… What other libraries are maybe even better for the purpose and what are the disadvantages, adavangaes… Thank you very much!!! Jan

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• multi-core processing in R on windows XP - via doMC and foreach

  - by Jan

  Hi guys, I'm posting this question to ask for advice on how to optimize the use of multiple processors from R on a Windows XP machine. At the moment I'm creating 4 scripts (each script with e.g. for (i in 1:100) and (i in 101:200), etc) which I run in 4 different R sessions at the same time. This seems to use all the available cpu. I however would like to do this a bit more efficient. One solution could be to use the "doMC" and the "foreach" package but this is not possible in R on a Windows machine. e.g. library("foreach") library("strucchange") library("doMC") # would this be possible on a windows machine? registerDoMC(2) # for a computer with two cores (processors) ## Nile data with one breakpoint: the annual flows drop in 1898 ## because the first Ashwan dam was built data("Nile") plot(Nile) ## F statistics indicate one breakpoint fs.nile <- Fstats(Nile ~ 1) plot(fs.nile) breakpoints(fs.nile) # , hpc = "foreach" --> It would be great to test this. lines(breakpoints(fs.nile)) Any solutions or advice? Thanks, Jan

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• add namespace + prefix to XML using XSL

  - by Jan

  Hi, I hope you can help... Let's assume I have following XML: <data> <token> <sessionId>12345</sessionId> <userId>john</userId> <moreInfo> <bla> ..... </bla> </moreInfo> </token> </data> And I need this to become <login:data xmlns="http://my.ns.uri"> <login:token> <login:sessionId>12345</sessionId> <login:userId>john</userId> <login:moreInfo> <login:bla> ..... </login:bla> </login:moreInfo> </login:token> </login:data> Can I do this with XSL? I did try but failed miserably ... Any help would be greatly appreciated! Thanks, Jan

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• How to manually add a legend to a ggplot object

  - by Dan

  I have this data frame: structure(list(month_num = 1:24, founded_month = c(4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 1L, 2L, 3L), founded_year = c(2008L, 2008L, 2008L, 2008L, 2008L, 2008L, 2008L, 2008L, 2008L, 2009L, 2009L, 2009L, 2009L, 2009L, 2009L, 2009L, 2009L, 2009L, 2009L, 2009L, 2009L, 2010L, 2010L, 2010L), count = c(270L, 222L, 256L, 250L, 277L, 268L, 246L, 214L, 167L, 408L, 201L, 225L, 203L, 220L, 230L, 225L, 177L, 207L, 166L, 135L, 116L, 122L, 69L, 42L), month_abb = c("Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", "Jan", "Feb", "Mar"), short_year = c("08", "08", "08", "08", "08", "08", "08", "08", "08", "09", "09", "09", "09", "09", "09", "09", "09", "09", "09", "09", "09", "10", "10", "10" ), proj = c(282, 246, 292, 298, 337, 340, 330, 310, 275, 528, 333, 369, 359, 388, 410, 417, 381, 423, 394, 375, 368, 386, 345, 330), label = c("Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", "Jan\n09", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", "Jan\n10", "Feb", "Mar")), .Names = c("month_num", "founded_month", "founded_year", "count", "month_abb", "short_year", "proj", "label"), row.names = c(NA, -24L), class = "data.frame") and i've got all of this done (I know the code's a bit ugly looking, pointers appreciated): p <- ggplot(m_summary2, aes(x = month_num, y = count)) p + geom_line(colour = rgb(0/255, 172/255, 0/255)) + geom_point(colour = rgb(0/255, 172/255, 0/255)) + geom_line(aes(x = m_summary2$month_num, y = m_summary2$proj), colour = rgb(18/255, 111/255, 150/255)) + geom_point(aes(x = m_summary2$month_num, y = m_summary2$proj), colour = rgb(18/255, 111/255, 150/255)) + scale_x_continuous("Month", breaks = m_summary2$month_num, labels = m_summary2$label) + scale_y_continuous("# Startups Founded") + opts(title = paste("# Startups Founded:", m_summary2$month_abb[1], m_summary2$short_year[1], "-", m_summary2$month_abb[nrow(m_summary2)], m_summary2$short_year[nrow(m_summary2)])) Now I would like to add a legend to clarify that the blue line is a projection and the green line is the current data. Thanks in advance!

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• Comparing two date ranges within the same table

  - by Danny Herran

  I have a table with sales per store as follows: SQL> select * from sales; ID ID_STORE DATE TOTAL ---------- -------- ---------- -------------------------------------------------- 1 1 2010-01-01 500.00 2 1 2010-01-02 185.00 3 1 2010-01-03 135.00 4 1 2009-01-01 165.00 5 1 2009-01-02 175.00 6 5 2010-01-01 130.00 7 5 2010-01-02 135.00 8 5 2010-01-03 130.00 9 6 2010-01-01 100.00 10 6 2010-01-02 12.00 11 6 2010-01-03 85.00 12 6 2009-01-01 135.00 13 6 2009-01-02 400.00 14 6 2009-01-07 21.00 15 6 2009-01-08 45.00 16 8 2009-01-09 123.00 17 8 2009-01-10 581.00 17 rows selected. What I need to do is to compare two date ranges within that table. Lets say I need to know the differences in sales between 01 Jan 2009 to 10 Jan 2009 AGAINST 01 Jan 2010 to 10 Jan 2010. I'd like to build a query that returns something like this: ID_STORE_A DATE_A TOTAL_A ID_STORE_B DATE_B TOTAL_B ---------- ---------- --------- ---------- ---------- ------------------- 1 2010-01-01 500.00 1 2009-01-01 165.00 1 2010-01-02 185.00 1 2009-01-02 175.00 1 2010-01-03 135.00 1 NULL NULL 5 2010-01-01 130.00 5 NULL NULL 5 2010-01-02 135.00 5 NULL NULL 5 2010-01-03 130.00 5 NULL NULL 6 2010-01-01 100.00 6 2009-01-01 135.00 6 2010-01-02 12.00 6 2009-01-02 400.00 6 2010-01-03 85.00 6 NULL NULL 6 NULL NULL 6 2009-01-07 21.00 6 NULL NULL 6 2009-01-08 45.00 6 NULL NULL 8 2009-01-09 123.00 6 NULL NULL 8 2009-01-10 581.00 So, even if there are no sales in one range or another, it should just fill the empty space with NULL. So far, I've come up with this quick query, but I the "dates" from sales to sales2 sometimes are different in each row: SELECT sales.*, sales2.* FROM sales LEFT JOIN sales AS sales2 ON (sales.id_store=sales2.id_store) WHERE sales.date >= '2010-01-01' AND sales.date <= '2010-01-10' AND sales2.date >= '2009-01-01' AND sales2.date <= '2009-01-10' ORDER BY sales.id_store ASC, sales.date ASC, sales2.date ASC What am I missing?

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• Consuming Web Services requiring Authentication from behind Proxy server

  - by Jan Petersen

  Hi All, I've seen a number of post about Proxy Authentication, but none that seams to address this problem. I'm building a SharePoint Web Service consuming desktop application, using Java, JAX-WS in NetBeans. I have a working prototype, that can query the server for authentication mode, successfully authenticate and retrieve a list of web site. However, if I run the same app from a network that is behind a proxy server (the proxy does not require authentication), then I'm running into trouble. The normal -dhttp.proxyHost ... settings does not seam to help any. But I have found that by creating a ProxySelector class and setting it as default, I can regain access to the authentication web service, but I still can't retrieve the list of web sites from the SharePoint server. It's almost as if the authentication I provide is going to the proxy rather than the SharePoint server. Anyone have any experience on how to make this work? I have put the source text java class files of a demo app up, showing the issue at the following urls (it's a bit to long even in the short demo form to post here). link text When running the code from a network behind a proxy server, I successfully retrieve the Authentication mode from the server, but the request for the Web Site list generates an exception originating at: com.sun.xml.internal.ws.transport.http.client .HttpClientTransport.readResponseCodeAndMessage(HttpClientTransport.java:201) The output from the source when no proxy is on the network is listed below: Successfully retrieved the SharePoint WebService response for Authentication SharePoint authentication method is: WINDOWS Calling Web Service to retrieve list of web site. Web Service call response: -------------- XML START -------------- <Webs xmlns="http://schemas.microsoft.com/sharepoint/soap/"> <Web Title="Collaboration Lab" Url="http://host.domain.com/collaboration"/> <Web Title="Global Data Lists" Url="http://host.domain.com/global_data_lists"/> <Web Title="Landing" Url="http://host.domain.com/Landing"/> <Web Title="SharePoint HelpDesk" Url="http://host.domain.com/helpdesk"/> <Web Title="Program Management" Url="http://host.domain.com/programmanagement"/> <Web Title="Project Site" Url="http://host.domain.com/Project Site"/> <Web Title="SharePoint Administration Tools" Url="http://host.domain.com/admin"/> <Web Title="Space Management Project" Url="http://host.domain.com/spacemgmt"/> </Webs> -------------- XML END -------------- Br Jan

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