happyrobots’s gists

happyrobots / install-linalg.txt

Created March 10, 2011 12:42

Installing Linalg on Fedora 14

	1. Download or clone from https://github.com/quix/linalg
	( Assume installation folder is linalg )
	2. Install dependencies (Lapack, BLAS and legacy Fortran library header)
	$ su
	# yum install lapack lapack-devel blas blas-devel gcc-gfortran.i686 compat-gcc-34.i686 compat-gcc-34-g77.i686

	3. Locate the Fortran header ( g2c.h )
	# updatedb
	# locate g2c.h
	/usr/lib/gcc/i686-redhat-linux/3.4.6/include/g2c.h

happyrobots / social-network.rb

Created February 21, 2011 12:33

happyrobots / upload.rb

Created February 19, 2011 23:55

quick and dirty file upload

	def upload(to_be_uploaded, upload_directory)
	uuid = UUIDTools::UUID.random_create
	uniq_name = "#{uuid}#{to_be_uploaded.original_filename}"
	uploaded_file = File.join(upload_directory, uniq_name)
	File.open(uploaded_file, "w") { \|f\| f.write(to_be_uploaded.read) }
	uploaded_file
	end

happyrobots / AddingWekaAttributesToDataSet.java

Created February 13, 2011 22:00

	FastVector attributes = new FastVector();
	attributes.addElement(numericAttribute);
	attributes.addElement(nominalAttribute);
	attributes.addElement(stringAttribute);
	attributes.addElement(anyOtherAttribute);
	attributes.addElement(anotherAttribute);

	Instances dataSet = new Instances("dataSetName", attributes, 50);
	dataSet.setClassIndex(dataSet.numAttributes() - 1);

happyrobots / CreatingWekaInstance.java

Created February 13, 2011 21:47

This is just one example of creating an instance in-memory. I think this way is readable and provides enough flexibility on attribute types (numeric, nominal, string).

	Instances dataSet = // ...
	Attribute stringAttribute = // ...
	Attribute nominalAttribute = // ...

	int numberOfAttributes = 3;
	Instance instance = new SparseInstance(numberOfAttributes);
	instance.setDataset(dataSet);

	instance.setValue(numericAttribute, 8.8);

happyrobots / ListingWekaInstances.java

Created February 13, 2011 21:17

	Instances dataSet = // ...

	// Showing attribute-type pairs of dataSet
	// Analogy with SQL: print field and field type of a table
	Enumeration attributes = dataSet.enumerateAttributes();
	while (attributes.hasMoreElements()) {
	Attribute attribute = (Attribute) attributes.nextElement();
	System.out.println(attribute.name() + ": " +
	Attribute.typeToString(attribute.type()));
	}

happyrobots / CreatingWekaAttributes.java

Created February 13, 2011 20:14

Weka examples how to create attribute with different types.

	FastVector validNominalValues = new FastVector(2);
	validNominalValues.addElement("male");
	validNominalValues.addElement("female");
	Attribute nominalAttribute = new Attribute("gender", validNominalValues);

	FastVector nullFastVector = null;
	Attribute stringAttribute = new Attribute("userId", nullFastVector);

	Attribute numericAttribute = new Attribute("humidity");

happyrobots / tree.xhtml

Created February 8, 2011 20:34

	<html>
	<head>
	<title>Hello World! This is the title of the page :D</title>

	<!-- Style makes your page look prettier. -->
	<style>
	body {background-color:#ccc}
	#content {border:1px solid black}
	.bigger {font-size:130%}
	</style>

happyrobots / setup-account.sh

Created January 18, 2011 00:35

	sudo useradd username -G gitosis,admin -d /home/username -s /bin/bash -m

	cat /etc/passwd \| grep username
	# this should output the home directory for username

happyrobots / SomeBean.java

Created January 14, 2011 22:31

[Managed Bean] Making Primefaces 2.2.RC1 Data Table Filtering works with multiple selection mode.

	// .. import statements

	// ViewScoped is important for AJAX
	@ManagedBean
	@ViewScoped
	public class SomeBean {
	private T[] selectedElementsFromTheList;
	private T[] copyOfSelectedElementsFromTheList;
	private List<T> theList;

	# https://github.com/arsduo/koala/wiki
	# https://github.com/arsduo/koala/wiki/Test-Users

	# routes.rb
	match ‘/auth/failure’, :to => ‘profiles#failure’

	# profiles_controller.rb
	class ProfilesController < ApplicationController
	def failure
	redirect_to login_url, :flash => {:alert => "Could not log you in. #{params[:message]}"}