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  • Bayes Misclassification error and plot : pattern recognition [closed]

    - by user1214586
    Below is a Matlab code for Bayes classifier which classifies arbitrary numbers into their classes. training = [3;5;17;19;24;27;31;38;45;48;52;56;66;69;73;78;84;88]; target_class = [0;0;10;10;20;20;30;30;40;40;50;50;60;60;70;70;80;80]; test = [1:2:90]'; class = classify(test,training, target_class, 'diaglinear'); % Naive Bayes classifier [test class] If someone could provide code snippets for calculating the Bayes error for misclassification and accuracy.Also, is it possible to plot a scatter plot and histogram indicating the number of data points belonging to different classes? Thank you.

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  • Jamie Oliver’s Food Revolution from a parent’s perspective

    This is the first generation of kids expected to live a shorter life than you. Or...you guys can start kicking some ass. Jamie Oliver. Theres been a show running on ABC recentlyabout 6 episodes. Its called Jamie Olivers Food Revolution. It appears to have been taped during the fall of 2009 in Huntington, West Virginia (which evidently was selected because of high child obesity data). The show absolutely has a bit of Hollywood, a ton of editing, but I dont think anyone can doubt Jamies (and the...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • choose the best class if 2 class have same P (c|d), naive bayes

    - by ryandi
    Hello I have some question about naive bayes classifier . In my project I have to classify a text into a class from 4 available class. In naive bayes we have formula like cmap=argmax.P(d|c).P(c) I have standarize the amount of training document of each class, so I got a same P(c) value for each class (0.25). Here's my question: What if a testing document token doesn't have any token which belong to any of those 4 class(in document training)? Resulted to all of the class have same value of P(d|c).P(c). Which class should i pick? What if the token exist, and 2 class or more have same value of P(d|c).P(c) what should I do? Thank you..

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  • Implementing Naïve Bayes algorithm in Java - Need some guidance

    - by techventure
    hello stackflow people As a School assignment i'm required to implement Naïve Bayes algorithm which i am intending to do in Java. In trying to understand how its done, i've read the book "Data Mining - Practical Machine Learning Tools and Techniques" which has a section on this topic but am still unsure on some primary points that are blocking my progress. Since i'm seeking guidance not solution in here, i'll tell you guys what i thinking in my head, what i think is the correct approach and in return ask for correction/guidance which will very much be appreciated. please note that i am an absolute beginner on Naïve Bayes algorithm, Data mining and in general programming so you might see stupid comments/calculations below: The training data set i'm given has 4 attributes/features that are numeric and normalized(in range[0 1]) using Weka (no missing values)and one nominal class(yes/no) 1) The data coming from a csv file is numeric HENCE * Given the attributes are numeric i use PDF (probability density function) formula. + To calculate the PDF in java i first separate the attributes based on whether they're in class yes or class no and hold them into different array (array class yes and array class no) + Then calculate the mean(sum of the values in row / number of values in that row) and standard divination for each of the 4 attributes (columns) of each class + Now to find PDF of a given value(n) i do (n-mean)^2/(2*SD^2), + Then to find P( yes | E) and P( no | E) i multiply the PDF value of all 4 given attributes and compare which is larger, which indicates the class it belongs to In temrs of Java, i'm using ArrayList of ArrayList and Double to store the attribute values. lastly i'm unsure how to to get new data? Should i ask for input file (like csv) or command prompt and ask for 4 values? I'll stop here for now (do have more questions) but I'm worried this won't get any responses given how long its got. I will really appreciate for those that give their time reading my problems and comment.

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  • A simple explanation of Naive Bayes Classification

    - by Jaggerjack
    I am finding it hard to understand the process of Naive Bayes, and I was wondering if someone could explained it with a simple step by step process in English. I understand it takes comparisons by times occurred as a probability, but I have no idea how the training data is related to the actual dataset. Please give me an explanation of what role the training set plays. I am giving a very simple example for fruits here, like banana for example training set--- round-red round-orange oblong-yellow round-red dataset---- round-red round-orange round-red round-orange oblong-yellow round-red round-orange oblong-yellow oblong-yellow round-red

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  • Naive Bayes matlab, row classification

    - by Jungle Boogie
    How do you classify a row of seperate cells in matlab? Atm I can classify single coloums like so: training = [1;0;-1;-2;4;0;1]; % this is the sample data. target_class = ['posi';'zero';'negi';'negi';'posi';'zero';'posi']; % target_class are the different target classes for the training data; here 'positive' and 'negetive' are the two classes for the given training data % Training and Testing the classifier (between positive and negative) test = 10*randn(25, 1); % this is for testing. I am generating random numbers. class = classify(test,training, target_class, 'diaglinear') % This command classifies the test data depening on the given training data using a Naive Bayes classifier Unlike the above im looking at wanting to classify: A B C Row A | 1 | 1 | 1 = a house Row B | 1 | 2 | 1 = a garden Can anyone help? Here is a code example from matlabs site: nb = NaiveBayes.fit(training, class) nb = NaiveBayes.fit(..., 'param1',val1, 'param2',val2, ...) I dont understand what param1 is or what val1 etc should be?

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  • Mahout Naive Bayes Classifier for Items

    - by Nimesh Parikh
    Team, I am working on a project where i need to classify Items into certain category. I have a single file as input; which contains target variable and space separated features. My training data will look like Category Name [Tab] DataString Plumbing [Tab] Pipe Tap Plastic Pipe PVC Pipe Cold Water Line Hot Water Line Tee outlet up Elbow turned up Elbow turned down Gate valve Globe valve Paint [Tab] Ivory Black Burnt Umber Caput Mortuum Violet Earth Red Yellow Ochre Titanium White Cadmium Yellow Light Cadmium Yellow Deep Cloths [Tab] Shirt T-Shirt Pent Jeans Tee Cargo Well, I have really big set of Category. I have couple of question here am i using correct data for Training? If no then what should i use? Once I train and Test my model, what is next step? How can i use output? Please help me with this Thanks, Nimesh

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  • please help me to interpret the naive bayes result in weka..

    - by resmi
    Anybody please help me to interpret the following result generated in weka for classification using naive bayes.....Please explain clearly what is this Normal Distribution , Mean , StandardDev , WeightSum and Precision.Please help me.Am new in weka. ** Naive Bayes Classifier Class Normal: Prior probability = 0.5 1374195_at: Normal Distribution. Mean = 218.06 StandardDev = 6.0572 WeightSum = 3 Precision = 36.34333334 1373315_at: Normal Distribution. Mean = 1142.58 StandardDev = 21.1589 WeightSum = 3 Precision = 126.95333339999999

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  • What is the difference between "su --command" and "su --session-command"?

    - by oliver
    Running # su - oliver --command bash gives a shell but also prints the warning bash: no job control in this shell, and indeed Ctrl+Z and fg/bg don't work in that shell. Running # su - oliver --session-command bash gives a shell without printing the warning, and job control indeed works. The suggestion to use --session-command comes from Starting a shell from scripts using su results in "no job control in this shell" which states "[a security fix for su] changed the behavior of the -c option and disables job control inside the called shell". But I still don't quite understand this. When should one use --command and when should one use --session-command? Is --command (aka -c) more secure? Or should one always use --session-command, and --command is just left in for backwards compatibility? FWIW, I'm using RHEL 6.4.

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  • ClassNotFoundException error in implementing Bayesian algorithm in Apache Mahout on Hadoop

    - by Shweta
    Hi, I have a problem in executing the Bayesian algorithm in Mahout. I built it with Maven and the job file is in target directory. When run from terminal using hadoop, I'm getting the ClassNotFoundException error. What should be done? $HADOOP_HOME/bin/hadoop jar mahout-core-0.3-SNAPSHOT.job org.apache.mahout.classifier.bayes.mapreduce.bayes.bayesdriver -i test -o output Exception in thread "main" java.lang.ClassNotFoundException: org.apache.mahout.classifier.bayes.mapreduce.bayes.bayesdriver at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at java.lang.ClassLoader.loadClass(ClassLoader.java:252) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:247) at org.apache.hadoop.util.RunJar.main(RunJar.java:149)

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  • Try out ubuntu on thinkpad x40 (via usb)?

    - by Oliver
    I am trying to try out ubuntu (i,e, install it within windows) on my thinkpad x40. I followed the instructions on how to create a bootable usb (http://www.ubuntu.com/download/ubuntu/download). No problem. The issue I have now is that th eusb ports on my x40 were burned before (common problem with the machine), i.e. do not work. So I got a USB notebook card from belkin. However it does not seem to recognize the usb stick from bios, thus I cannot boot from it. I also do not have a cd rom. Then tried to run wubi from the usb stick, briefly appears in task manager, no further action. So I tried it with wubi.exe, but same thing. Downloaded it to desktop, run it, briefly appears in the task manager under processes, no further action. Any one idea? I have enough memory and enough freed hd space. Thanks. Oliver

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  • vim indentation for bullet lists

    - by Oliver
    hi, all I often write text with format like this in VIM My talking points: - talking point 1 - talking point 2 .... continue on point 2 Ideally, I would hope VIM can auto align it for me such as: - talking point 1 - talking point 2 continue on point 2 Is this possible? thanks Oliver

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  • vim format help

    - by Oliver
    hi, all I often write text with format like this in VIM My talking points: - talking point 1 - talking point 2 .... continue on point 2 Ideally, I would hope VIM can auto align it for me such as: - talking point 1 - talking point 2 continue on point 2 Is this possible? thanks Oliver

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  • Looking for bug tracking software

    - by Shelton
    I'm looking for a bug/issue tracking system that can: Integrate with lots of other services. Basecamp, Beanstalk, etc. Integrate popular CMSs, such as WordPress, so the client can enter a ticket from the system that is familiar to them and not have one more login to worry about. Generate reports for my own purposes. Bonus if there's an iPhone app. Doesn't require additional development on my end (I have plenty of money and no time). I've already looked into Lighthouse and ZenDesk -- both are solid offerings -- but don't see what I need out of the box. I'd have to build CMS plug-ins. And I've looked through WP plug-ins for bug tracking software, but nothing I've found integrates with these products. Anyone know of something that meets these requirements without additional development, or am I stuck putting my business on hold to get this piece in place myself?

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  • LDAP over SSL/TLS working for everything but login on Ubuntu

    - by Oliver Nelson
    I have gotten OpenLDAP with SSL working on a test box with a signed certificate. I can use an LDAP tool on a Windows box to view the LDAP over SSL (port 636). But when I run dpkg-reconfigure ldap-auth-config to setup my local login to use ldaps, my login under a username in the directory doesn't work. If I change the config to use just plain ldap (port 389) it works just fine (I can login under a username in the directory). When its setup for ldaps I get Auth.log shows: Sep 5 13:48:27 boromir sshd[13453]: pam_ldap: ldap_simple_bind Can't contact LDAP server Sep 5 13:48:27 boromir sshd[13453]: pam_ldap: reconnecting to LDAP server... Sep 5 13:48:27 boromir sshd[13453]: pam_ldap: ldap_simple_bind Can't contact LDAP server I will provide whatever are needed. I'm not sure what else to include. Thanx for any insights... OLIVER

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  • Does Outlook continue to auto-discover account settings for already configured accounts? Can it be prevented?

    - by Oliver Salzburg
    fail2ban just locked me out of our website because something from my desktop was hammering port 443 on the server (which is not in use). I saw my IP also requesting "GET /autodiscover/autodiscover.xml HTTP/1.1", so I assume that's what's going on on port 443 as well. But I only have 1 email account configured in Outlook and it's working just fine. The account is for the address [email protected] and said server will answer for example.com, but that server is not our MX and it is also not configured as an Exchange server in my mail account. So, why is Outlook still trying to retrieve those auto-configuration settings?

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  • LDAP over SSL/TLS working for everything but login on Ubuntu

    - by Oliver Nelson
    I have gotten OpenLDAP with SSL working on a test box with a signed certificate. I can use an LDAP tool on a Windows box to view the LDAP over SSL (port 636). But when I run dpkg-reconfigure ldap-auth-config to setup my local login to use ldaps, my login under a username in the directory doesn't work. If I change the config to use just plain ldap (port 389) it works just fine (I can login under a username in the directory). When its setup for ldaps I get Auth.log shows: Sep 5 13:48:27 boromir sshd[13453]: pam_ldap: ldap_simple_bind Can't contact LDAP server Sep 5 13:48:27 boromir sshd[13453]: pam_ldap: reconnecting to LDAP server... Sep 5 13:48:27 boromir sshd[13453]: pam_ldap: ldap_simple_bind Can't contact LDAP server I will provide whatever are needed. I'm not sure what else to include. Thanx for any insights... OLIVER

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  • SQLCODE -1390 connecting to DB2 64 bit client from 32 bit app

    - by Oliver Abraham
    Hi there, I've got a 32 bit application that connects normally to a DB2 database. (written in C) When I run it on a machine with a DB2 64 bit client, I get a SQLCODE -1390 from connect. (Win7 64 Bit, DB2 V9.7 client 64 bit) Connecting from the command line works (db2 connect to ...) With a 32 Bit DB2 client on the same Win7 64 Bit machine, the connect also works. Does anyone has an idea how to fix it ? Best regards Oliver

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  • vim fuzzy finder subdirectory search?

    - by Oliver
    hi, all Is there anyway to ask Fuzzy Finder plugin for VIM search subdirectory as well? It appears to me that no matter what mode I am in, it either search current directory, or I have to be explicit on subdirectory name for it to dive in. Another plugin folks here mentioned in fuzzy finder textmate plugin. Unfortunately, this plugin doesn't work with current version of vim-fuzzy finder, or so it appears to me. Any suggestions? TIA Oliver

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  • FFMPEG Install on EC2 - Amazon Linux

    - by Oliver Holmberg
    Hello Serverfault friends, I am about two days into attempting to install FFMPEG with dependencies on an AWS EC2 instance running the Amazon Linux AMI. I've installed FFMPEG on Ubuntu and Fedora systems with no problems in the past, and have read reportedly successful instructions on installing on Red Hat/Fedora. I have followed a number of tutorials and forum articles to do so, but have had no luck yet. As far as I can tell, the main problems are as followed: The amazon linux (Most similar to red-hat/centos) yum repositories don't have ffmpeg available. I have found instructions to update the repositories to include the required packages, but adding these repositories cause yum to fail in updating packages. (Also, I've read some cautionary tales about adding redhat/centos repositories to amazon linux that lead me to believe it may be a bad idea) (https://forums.aws.amazon.com/thread.jspa?messageID=229166) I have tried a more complicated method of downloading the source tarball, compiling, and installing, but this always fails due to missing dependencies and other errors. On to my question: Has anyone successfully installed FFMPEG on Amazon Linux? Is there a fundamental incompatibility? If anyone could share specific instructions on installing ffmpeg on amazon linux I would be greatly appreciative. Any other insights/experiences would also be appreciated. Thanks in advance, Oliver

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  • Numeric UIDs/GIDs in ACLs on OS X server (10.6)

    - by Oliver Humpage
    Hi, On one (old OS X 10.4) server I'm tarring up some files which have ACLs. I'm then using ``tar -xp'' to untar the archive onto a new 10.6 server, which doesn't have any users/groups configured on it yet except the default admin (UID 501) (there's a reason for that, don't ask!). Obviously this means an "ls -lne" will list files and ACLs with numeric UIDs and GIDs. Now for the normal file permissions it makes sense: you get UIDs like "1037". And for some ACLs, it also makes sense: you get things like "AAAABBBB-CCCC-DDDD-EEEE-FFFF00000402" for groups (0x402 = GID 1026) and "FFFFEEEE-DDDD-CCCC-BBBB-AAAA000001F5" for users (0x1F5 = UID 501). However, some ACLs have a UIDs like "E51DA674-AE70-41BC-8340-9B06C243A262" or GIDs like "0A3FCD24-0012-46FA-B085-88519E55EF29" and I have absolutely no idea how to translate these IDs back into something that could be matched back to the original IDs (UID 1072 and GID 1047 respectively in this example). Can anyone help me translate these weird long hex strings? (Basically we're moving from local users to an Active Directory setup, so I want to move all files to the new server with permissions intact, then chmod, chgrp and set ACLs such that we translate old IDs to the new AD IDs. Hence needing some way to map between the sets. I don't believe there's an easier way to do this?) Many thanks, Oliver.

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  • How to test email spam scores with amavis?

    - by CaptSaltyJack
    I'd like a way to test a spam message to see its spam scores that SpamAssassin gives it. The SA db files (bayes_toks, etc) reside in /var/lib/amavis/.spamassassin. I've been testing emails by doing this: sudo su amavis -c 'spamassassin -t msgfile' Though this yields some strange results, such as: Content analysis details: (3.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 3.5 BAYES_99 BODY: Bayes spam probability is 99 to 100% [score: 1.0000] -0.0 NO_RELAYS Informational: message was not relayed via SMTP 0.0 LONG_TERM_PRICE BODY: LONG_TERM_PRICE 0.2 BAYES_999 BODY: Bayes spam probability is 99.9 to 100% [score: 1.0000] -0.0 NO_RECEIVED Informational: message has no Received headers 0.2 is an awfully low scores for BAYES_999! But this is the first time I've used amavis, previously I've always just used spamassassin directly as a content filter in postfix, but apparently running amavis/spamassassin is more efficient. So, with amavis in the picture, how can I run a test on a message to see its spam score breakdown? Another email I ran a test on got this result: 2.0 BAYES_80 BODY: Bayes spam probability is 80 to 95% [score: 0.8487] Doesn't make sense, that BAYES_80 can yield a higher score than BAYES_999. Help!

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  • How to print WPF Grid paged?

    - by Oliver Hanappi
    Hi! I'm printing a WPF grid. As long as the data fits on one page, everything works fine. But sometimes the grid contains more data. Therefore I need to split the grid into multiple pages. Can anybody help me? My code looks like this (visual is the grid). var printCapabilities = printDialog.PrintQueue.GetPrintCapabilities(printDialog.PrintTicket); var size = new Size(printCapabilities.PageImageableArea.ExtentWidth, printCapabilities.PageImageableArea.ExtentHeight); visual.Measure(size); visual.Arrange(new Rect(new Point(printCapabilities.PageImageableArea.OriginWidth, printCapabilities.PageImageableArea.OriginHeight), size)); printDialog.PrintVisual(visual, "Print ListView"); Should I try another control? I've tried WPF Toolkit DataGrid, but I couldn't manage to get it printed. I've heard something of a flow document, can this help me? Best Regards Oliver Hanappi

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