anfactpc 1.0 
Date Added: March 31, 2013  Visits: 209 


This mfile deals with the principal component solution of the factor model thru the complete data matrix, the latent root criterion, and uses the varimax factor rotation. Optionally, it also gives the residual matrix, which results of the difference between the original correlation and the correlation structure for the factor model.The purpose of Factor Analysis is to describe as possible the covariance relationships among many variables in terms of a few underlying and unobservable random quantities called factors. It can be considered as an extension of Principal Components Analysis, but its approximation is more elaborate. The factor model postulates that the Xobservable random vector with p components is linearly dependent upon a few unobservable random variables F_1,F_2,...,F_m, called common factors, and p additional sources of variation e_1,e_2,...,e_m, called errors or specific factors (a component unique to that particular X_i and not shared by the others XdlDLs). So, the model is: X_1 = b_11*F_1 + b_12*F_2 + ...+ b_1m*F_m + e_1 X_2 = b_21*F_1 + b_22*F_2 + ...+ b_2m*F_m + e_2 . . : : X_p = b_p1*F_1 + b_p2*F_2 + ...+ b_pm*F_m + e_pIn matrix notation it can be written as, X = B*F + ewhere, B is the matrix of loadings of the ith variable on the jth factor. F and e are, respectively, the random vectors of the common factors and errors. Value m are the number of factors specified ahead of time to complete the model and selected by a spacific criteria as the latent root, a priori, percentage of variance or scree test. The latent root criterion can be used as a guideline for a first attempt or as a definitive selection of the number of factors: it must be less that the p number of components(variables).According to Rencher (2002), there are four approaches to estimation of the loadings and communalities:(1) Principal Component Metdod; (2) Principal Factor Method; (3) Iterated Principal Factor Method, and (4) Maximum Likelihood Method. The two most popular methods of parameter estimation are the principal component and the maximum likelihood method. The solution from either method can be rotated in order to simplify the interpretation of factors. It is always prudent to try more than one method of solution.Some of the purposes for which Factor Analysis can be used are (1) that the number of variables for further research can be minimized while also maximizing the amount of information in the analysis (the smaller set can be used as operational representatives of the constructs underlying the complete set of variables), (2) can be used to search data for possible qualitative and quantitative distinctions and particularly useful when the sheer amount of available data exceeds comprehensibility, and (3) if the domain of data can be hypothesized to have certain qualitative and quantitative distinctions, then this hypothesis can be tested by factor analysis.Syntax: function [anfactpc] = anfactpc(X) Input: X  Data matrix. Size ndata x pvariables. Outputs: Complete Factor Analysis Results such as:  Table of the Extraction of Components.  Table of Unrotated Principal Components of the Factor Analysis.  Proportion of Total (standardized) Sample Variance.  Table of Cumulative Proportion of Total (standardized) Sample Variance. Optionally:  Table of Varimax Rotated Principal Components of the Factor Analysis.  Pairwise Unrotated Factor Score Plots.  Pairwise Varimax Rotated Factor Score Plots.  Object labels.  Residual Matrix.

License: Shareware  Size: 10 KB 
Science

Phight 1.0
Phight  a phylogeny tree building program Currently, it supports Likelihood method and distance method. This program will includes diagnostic function as a special feature. 
466.48 KB  
Development Tools

maroce 1.0
This mfile deals with the iterated principal factor method (principal axis factoring) thru the complete data matrix, the latent root criterion, iteration convergence criterion, and uses the varimax factor rotation. It works with an iterative... 
10 KB  
Development Tools

marocewod 1.0
This mfile deals with the iterated principal factor method (principal axis factoring) thru the Rcorrelation matrix (without the matrix of data), the latent root criterion, iteration convergence criterion, and uses the varimax factor rotation. It... 
10 KB  
Modules

Shipping Method Based On Order Total 1.0
This contribution will allow you to choose the shipping method based on the total order, i.e. for orders under $200, ship with USPS, while for orders over $200, ship with UPS. It will also allow you to enable/disable shipping, depending on whether... 

Education

(p)IPHULA 1.16
(p)IPHULA is a software that investigates parameters of population history based on a Monte Carlo simulation using the maximum likelihood framework. Further details on how to compile, install, run, and use this program can be found in... 
706.56 KB  
Development Tools

Particle Filter comparison with Smoothing Methods 1.0
This program simulates a nonlinear dynamical system and estimates the hidden state using particle methods.The program compares the performance of 3 particle methods (particle filter, forward backward smoother (FBS),and Maximum APosterior Smoother... 
819.2 KB  
Networking

Super Tags Widget 1.4.1
The Super Tags plugin, is a customizable alternative to the default WordPressdlT« Tag Cloud widget. This widget makes it possible for you to fully customize a Tag Cloud ( or multiple Tag Clouds ) to meet your specific needs. It takes the same... 
1.48 MB  
Programming

CNrun 1.1.8
A neuronal network simulator using NeuroML (as generated by neuroConstruct) for network description. Conductance and ratebased HodgkinHuxley neuron models, and a number of other neurons & synapses. A 56order RK method is used for integration. 
378.88 KB  
Development Tools

Copula generation and estimation 1.0
Functions written in 2007 for Master Thesis: "Simulating dependent random variables using copulas. Applications to Finance and Insurance". Functions include MVCOPRND  multivariate copula generator, CMLSTAT for estimation of copula parameters... 
10 KB  
Libraries

Device::Audiotron 1.02
Device::Audiotron provides a tiein into the API included in the latest firmware for Voyetra Turtle Beachs Audiotron. SYNOPSIS use Device::Audiotron; $at = new Device::Audiotron("Audiotron IP address","username","password"); if(!$at){die... 
4.1 KB 
Scripts

Freelancer Script 5.05
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Post projects. Featured projects. Private projects. Sealed projects. Edit/delete projects. Select freelancers.... 
5.49 MB  
Scripts

B2B Script 4.20
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Signup Account (Registration of account). Lead generation tools (for the sellers). Email verification to... 
5.49 MB  
Scripts

B2C Script 5.06
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). The script comes with totally editable site colors, icons and graphics Multilevel categories allows extensive browsing Admin can change Category ordering or... 
5.49 MB  
Scripts

Social Networking Script 2.86
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Registration with name, email, password, date of birth etc. User can add multiple school, college, university with start... 
5.49 MB  
Scripts

Business Networking Script 8.04
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Ajax based interface. Profile creation. Different types of profile. Profile for jobseekers, employers and employed... 
5.49 MB  
Development Tools

VMP Viewer 1.0
This is a very rudimentary tool to visualize the VMP files generated by BrainVoyager. Useful to share files with people who do not have BV. 
10 KB  
Development Tools

Sending reports and timestamped file by emailing 1.0
main executing reference usage:[1] usage_send_mail.mIllustrates email sending with multiple separate files or single timestamped tar file. Attachment failure is properly handled, with continuation of report emailing without the attachment.[2]... 
768 KB  
Development Tools

IrisMVC 2.0 rc1
IrisMVC is an OOP PHP framework that developers can use as a strong and secure foundation to build on various web applications following the ModelViewController (MVC) pattern. It provides the basic functionality developers need, without... 
51.2 KB  
Development Tools

7Zip for Script 4.42
7Zip is a file archiver with a high compression ratio.Features: High compression ratio in new 7z format with LZMA compression Supported formats: Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM,... 
624.64 KB  
Development Tools

Barnardextest 1.0
This file, as the Fisher's exact test, performs the exact probability test for a table of frequency data crossclassified according to two categorical variables, each of which has two levels or subcategories (2x2). It is a nonparametric... 
10 KB 