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Multivariate analysis by PCA, PLS(-DA), and OPLS(-DA)
=====================================================

A Galaxy module from the [Workflow4metabolomics](http://workflow4metabolomics.org) project

Status: [![Build Status](https://travis-ci.org/workflow4metabolomics/multivariate.svg?branch=master)](https://travis-ci.org/workflow4metabolomics/multivariate).

## Description

**Version:** 2.3.2  
**Date:** 2016-05-15  
**Author:** Etienne A. Thevenot (CEA, LIST, MetaboHUB, W4M Core Development Team)   
**Email:** [etienne.thevenot(at)cea.fr](mailto:[e-mail])  
**Citation:** Thevenot E.A., Roux A., Xu Y., Ezan E. and Junot C. (2015). Analysis of the human adult urinary metabolome variations with age, body mass index and gender by implementing a comprehensive workflow for univariate and OPLS statistical analyses. *Journal of Proteome Research*, **14**:3322-3335. [doi:10.1021/acs.jproteome.5b00354](http://dx.doi.org/10.1021/acs.jproteome.5b00354)  
**Licence:** CeCILL  
**Funding:** Agence Nationale de la Recherche ([MetaboHUB](http://www.metabohub.fr/index.php?lang=en&Itemid=473) national infrastructure for metabolomics and fluxomics, ANR-11-INBS-0010 grant)

## Installation

* Configuration file: `multivariate_config.xml`.
* Image files: 
  + `static/images/multivariate_workflowPositionImage.png`.
  + `static/images/multivariate_workingExampleImage.png`.
* Wrapper file: `multivariate_wrapper.R`.
* R packages  
  + **batch** from CRAN  
  
    ```r
    install.packages("batch", dep=TRUE)  
    ```

  + **ropls** from Bioconductor  
  
    ```r
    install.packages("batch", dep=TRUE)  
    source("http://www.bioconductor.org/biocLite.R")  
    biocLite("ropls")      
    ```

## Tests

The code in the wrapper can be tested by running the `tests/multivariate_tests.R` in R.

You will need to install **RUnit** package in order to make it run:
```r
install.packages('RUnit', dependencies = TRUE)
```

## News

### CHANGES IN VERSION 2.3.2

INTERNAL MODIFICATION  

 * Modification of the `multivariate_wrapper.R` file to handle **ropls** package versions of 1.3.15 and above (i.e. after switching to S4 classes).
    
***

### CHANGES IN VERSION 2.3.0

NEW FEATURES  

 * **Predictions** now available (see the 'Samples to be tested' argument).
 * OPLS(-DA): **Predictive and Orthogonal VIP** are now computed (see the 'comments' section).
 * **Multiclass PLS-DA** implemented (see the 'comments' section).

***