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Universitat de Girona. Departament dâ€™InformÃ tica i MatemÃ tica Aplicada  
Parent, SergeÃ‰tienne
Covington, Kyle R. 

The compositional analyst must use a series of software to transform raw compositionaldata and run statistical analyses on them. Tools for compositional data analysis areavailable in R, an open source widelyused statistical computing environment. However,using R requires prior programming knowledge. RedR is an opensource, userfriendlyvisual data flow interface based on R. The interface uses principles of pipelineprogramming where functions are represented as icons, termed widgets, and data flowsfrom one function to another by drawing lines between them on a canvas. RedR is ableto perform common data analysis tasks (hypothesis tests, analysis of variance,regressions, principal component analysis, data cloud plots, bar plots, biplots, etc.). Wehave developed a novel RedR package which implements the compositions package inR. Our compositions package can be used to perform compositional data operations overraw data (closure, additive, centered and isometric log ratio transformations,perturbations and powering, etc.), and create compositional plots (ternary diagrams, ilrdendrograms,etc.) without prior programming knowledge, after few basic operations.The objective of this work is to present RedR and its compositions package using anapplication example for geochemical data. The network of widgets provides an easytofollowstepbystep procedure to run a large number of operations available in R, hencefacilitating the tasks of the compositional data analyst. Furthermore, the entire analysisnetwork can be saved and reloaded. Reports can be generated from the widget network todocument and share results. Nonprogrammers can have an easy access to the advancedtools available in compositions analysis  
http://hdl.handle.net/2072/273632  
eng  
Universitat de Girona. Departament dâ€™InformÃ tica i MatemÃ tica Aplicada  
Tots els drets reservats  
EstadÃstica matemÃ tica  Congressos
Mathematical statistics  Congresses AnÃ lisi multivariable  Congressos Multivariate analysis  Congresses EstadÃstica  Programes dâ€™ordinador  Congressos Statistics  Computer programs  Congresses 

Compositional Data Analysis with RedR  
info:eurepo/semantics/conferenceObject  
Recercat 