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Author: Peter Filzmoser Publisher: Springer ISBN: 3319964224 Category : Mathematics Languages : en Pages : 288
Book Description
This book presents the statistical analysis of compositional data using the log-ratio approach. It includes a wide range of classical and robust statistical methods adapted for compositional data analysis, such as supervised and unsupervised methods like PCA, correlation analysis, classification and regression. In addition, it considers special data structures like high-dimensional compositions and compositional tables. The methodology introduced is also frequently compared to methods which ignore the specific nature of compositional data. It focuses on practical aspects of compositional data analysis rather than on detailed theoretical derivations, thus issues like graphical visualization and preprocessing (treatment of missing values, zeros, outliers and similar artifacts) form an important part of the book. Since it is primarily intended for researchers and students from applied fields like geochemistry, chemometrics, biology and natural sciences, economics, and social sciences, all the proposed methods are accompanied by worked-out examples in R using the package robCompositions.
Author: Peter Filzmoser Publisher: Springer ISBN: 3319964224 Category : Mathematics Languages : en Pages : 288
Book Description
This book presents the statistical analysis of compositional data using the log-ratio approach. It includes a wide range of classical and robust statistical methods adapted for compositional data analysis, such as supervised and unsupervised methods like PCA, correlation analysis, classification and regression. In addition, it considers special data structures like high-dimensional compositions and compositional tables. The methodology introduced is also frequently compared to methods which ignore the specific nature of compositional data. It focuses on practical aspects of compositional data analysis rather than on detailed theoretical derivations, thus issues like graphical visualization and preprocessing (treatment of missing values, zeros, outliers and similar artifacts) form an important part of the book. Since it is primarily intended for researchers and students from applied fields like geochemistry, chemometrics, biology and natural sciences, economics, and social sciences, all the proposed methods are accompanied by worked-out examples in R using the package robCompositions.
Author: Surendra P. Verma Publisher: Springer ISBN: 9811392781 Category : Science Languages : en Pages : 675
Book Description
This book highlights major problems in the statistical analysis of compositions that have been known for over a century, as well as the corresponding solutions that have been put forward by specialists over the past 30 years. The basic assumptions of normality or multi-normality are pointed out and methods to test and achieve them are also covered. The conventional major and trace element geochemistry and modeling equations are discussed, and are followed by a more sophisticated multidimensional approach to data handling. The book’s main focus is on the use of statistical techniques to facilitate data interpretation. It also highlights the classification (or nomenclature) and tectonic discrimination aspects for both igneous and sedimentary rocks. The book concludes by discussing computer programs that are helping pave the way from geochemistry to geochemometrics. Written by a leading expert in the area of geochemistry, it offers a valuable guide for students and professionals in the area.
Author: Vera Pawlowsky-Glahn Publisher: John Wiley & Sons ISBN: 0470711353 Category : Mathematics Languages : en Pages : 405
Book Description
It is difficult to imagine that the statistical analysis of compositional data has been a major issue of concern for more than 100 years. It is even more difficult to realize that so many statisticians and users of statistics are unaware of the particular problems affecting compositional data, as well as their solutions. The issue of ``spurious correlation'', as the situation was phrased by Karl Pearson back in 1897, affects all data that measures parts of some whole, such as percentages, proportions, ppm and ppb. Such measurements are present in all fields of science, ranging from geology, biology, environmental sciences, forensic sciences, medicine and hydrology. This book presents the history and development of compositional data analysis along with Aitchison's log-ratio approach. Compositional Data Analysis describes the state of the art both in theoretical fields as well as applications in the different fields of science. Key Features: Reflects the state-of-the-art in compositional data analysis. Gives an overview of the historical development of compositional data analysis, as well as basic concepts and procedures. Looks at advances in algebra and calculus on the simplex. Presents applications in different fields of science, including, genomics, ecology, biology, geochemistry, planetology, chemistry and economics. Explores connections to correspondence analysis and the Dirichlet distribution. Presents a summary of three available software packages for compositional data analysis. Supported by an accompanying website featuring R code. Applied scientists working on compositional data analysis in any field of science, both in academia and professionals will benefit from this book, along with graduate students in any field of science working with compositional data.
Author: Javier Gutiérrez-Rexach Publisher: Routledge ISBN: 131749802X Category : Foreign Language Study Languages : en Pages : 1774
Book Description
The Enciclopedia de Linguistica Hispánica provides comprehensive coverage of the major and subsidiary fields of Spanish linguistics. Entries are extensively cross-referenced and arranged alphabetically within three main sections: Part 1 covers linguistic disciplines, approaches and methodologies. Part 2 brings together the grammar of Spanish, including subsections on phonology, morphology, syntax and semantics. Part 3 brings together the historical, social and geographical factors in the evolution of Spanish. Drawing on the expertise of a wide range of contributors from across the Spanish-speaking world the Enciclopedia de Linguistica Hispánica is an indispensable reference for undergraduate and postgraduate students of Spanish, and for anyone with an academic or professional interest in the Spanish language/Spanish linguistics.
Author: Noa P. Cruz Díaz Publisher: John Benjamins Publishing Company ISBN: 9027262950 Category : Language Arts & Disciplines Languages : en Pages : 107
Book Description
Negation and speculation detection is an emerging topic that has attracted the attention of many researchers, and there is clearly a lack of relevant textbooks and survey texts. This book aims to define negation and speculation from a natural language processing perspective, to explain the need for processing these phenomena, to summarise existing research on processing negation and speculation, to provide a list of resources and tools, and to speculate about future developments in this research area. An advantage of this book is that it will not only provide an overview of the state of the art in negation and speculation detection, but will also introduce newly developed data sets and scripts. It will be useful for students of natural language processing subjects who are interested in understanding this task in more depth and for researchers with an interest in these phenomena in order to improve performance in other natural language processing tasks.
Author: K. Gerald van den Boogaart Publisher: Springer Science & Business Media ISBN: 3642368093 Category : Mathematics Languages : en Pages : 269
Book Description
This book presents the statistical analysis of compositional data sets, i.e., data in percentages, proportions, concentrations, etc. The subject is covered from its grounding principles to the practical use in descriptive exploratory analysis, robust linear models and advanced multivariate statistical methods, including zeros and missing values, and paying special attention to data visualization and model display issues. Many illustrated examples and code chunks guide the reader into their modeling and interpretation. And, though the book primarily serves as a reference guide for the R package “compositions,” it is also a general introductory text on Compositional Data Analysis. Awareness of their special characteristics spread in the Geosciences in the early sixties, but a strategy for properly dealing with them was not available until the works of Aitchison in the eighties. Since then, research has expanded our understanding of their theoretical principles and the potentials and limitations of their interpretation. This is the first comprehensive textbook addressing these issues, as well as their practical implications with regard to software. The book is intended for scientists interested in statistically analyzing their compositional data. The subject enjoys relatively broad awareness in the geosciences and environmental sciences, but the spectrum of recent applications also covers areas like medicine, official statistics, and economics. Readers should be familiar with basic univariate and multivariate statistics. Knowledge of R is recommended but not required, as the book is self-contained.
Author: Antonella Buccianti Publisher: Geological Society of London ISBN: 9781862392052 Category : Mathematics Languages : en Pages : 232
Book Description
Since Karl Pearson wrote his paper on spurious correlation in 1897, a lot has been said about the statistical analysis of compositional data, mainly by geologists such as Felix Chayes. The solution appeared in the 1980s, when John Aitchison proposed to use Iogratios. Since then, the approach has seen a great expansion, mainly building on the idea of the `natural geometry' of the sample space. Statistics is expected to give sense to our perception of the natural scale of the data, and this is made possible for compositional data using Iogratios. This publication will be a milestone in this process.
Author: Evelyn Arizpe Publisher: A&C Black ISBN: 1780937768 Category : Literary Criticism Languages : en Pages : 289
Book Description
Winner of the Literacy Research Association's 2015 Edward B. Fry Book Award Immigration is an ongoing, global phenomenon and schools and teachers in host countries must continually find new ways of working with the increasing numbers of immigrant pupils, including refugees and asylum seekers. Language and literacy are crucial for inclusion in a new context but these must be developed in spaces where these children feel safe to explore themes that resonate with their experiences; to express their understanding and to engage in intercultural exchange. Visual Journeys Through Wordless Narratives presents the exploration of response strategies to Shaun Tan's The Arrival. The inquiry was carried out in educational settings, with children from many different parts of the world, in four host countries: the UK, Spain, Italy and the USA. The findings reveal the benefits of using wordless narratives such as picturebooks and graphic novels together with visual strategies to support immigrant children's literary understandings and visual literacy. They also reveal the wealth of experiences the children bring with them which have the potential to transform educational practices.
Author: Maxwell E. McCombs Publisher: Psychology Press ISBN: 9780805825558 Category : Mass media Languages : en Pages : 290
Book Description
First in a trilogy on Communication and Democracy. Also fits with Gonzenbach, Semetko, and Protess/MccOmbs. For grads and beyond in journalism, poli comm, and mass comm.
Author: Peter Filzmoser
Author: Peter Filzmoser
Author: Surendra P. Verma
Author: Vera Pawlowsky-Glahn
Author: Javier Gutiérrez-Rexach
Author: Noa P. Cruz Díaz
Author: K. Gerald van den Boogaart
Author: Antonella Buccianti
Author: 
Author: Evelyn Arizpe
Author: Maxwell E. McCombs