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Tony Davies Columns

A.M.C. Davies

Norwich Near Infrared Consultancy, 75 Intwood Road, Cringleford, Norwich NR4 6AA, UK

Introduction

In my last column I began a revision of basic chemometrics.1 In this column I will discuss some interpretation of the results produced by principal component analysis (PCA) as part two of this revision programme.

Issue 17/2 (2005)

Tony Davies

External Professor, University of Glamorgan, UK, c/o Waters Informatics, Europaallee 27–29, 50226 Frechen, Germany

Issue 17/1 (2005)

PCA is a mathematical method of reorganising information in a data set of samples. It can be used when the set contains information from only a few variables but it becomes more useful when there are large numbers of variables, as in spectroscopic data.

Issue 16/6 (2004)

Peter Lampena and Tony Daviesb

aISAS, Institute for Analytical Sciences, Bunsen-Kirchhoff-Str.11, 44139 Dortmund, Germany
bExternal Professor, University of Glamorgan, UK. c/o Waters Informatics, Europaallee 27–29, 50226 Frechen, Germany

Issue 16/5 (2004)

A.M.C. Davies

Norwich Near Infrared Consultancy, 75 Intwood Road, Cringleford, Norwich NR4 6AA, UK

Issue 16/4 (2004)

Tony Davies

External Professor, University of Glamorgan, UK c/o Waters Informatics, Europaallee 27–29, 50226 Frechen, Germany

Issue 16/3 (2004)

A.M.C. Davies

Norwich Near Infrared Consultancy, 75 Intwood Road, Cringleford, Norwich NR4 6AA, UK

Issue 16/2 (2004)

Tony Davies

External Professor, University of Glamorgan, UK, c/o Creon Lab Control AG, Europaallee 27–29 50226 Frechen, Germany

Issue 16/1 (2004)

A.M.C. Davies

Norwich Near Infrared Consultancy, 75 Intwood Road, Cringleford, Norwich NR4 6AA, UK

Issue 15/6 (2003)

Tony Davies,a Peter Lampen,b Maren Fiege,c Thorsten Richterc and Thorsten Fröhlichc

aExternal Professor, University of Glamorgan, UK. c/o Creon Lab Control AG, Europaallee 27-29 50226 Frechen, Germany
bISAS, institute for Spectrochemistry and Applied Spectroscopy, Dortmund, Germany
cCreon Lab Control AG, Europaallee 27-29 50226 Frechen, Germany

Issue 15/5 (2003)

The International Spectroscopic Database (IS-DB) went live on 19 May 2003. Following over seven years fighting for funding and receiving the EU EuroSpec grant1 in 2002 the team are pleased to announce that the first version of the international digital archive for spectroscopic data was switched on for data deposition in May.

Issue 15/3 (2003)

Tony Davies

External Professor, University of Glamorgan, UK c/o Creon Lab Control AG, Europaallee 27–29, 50226 Frechen, Germany

Issue 15/1 (2003)

A.M.C.Davies,a and Tom Fearn,b

aNorwich Near Infrared Consultancy, 75 Intwood Road, Cringleford, Norwich NR4 6AA,UK
bDepartment of Statistical Science, University College London, Gower Street, London

Issue 14/6 (2002)

D.B. Coates

CSIRO Sustainable Ecosystems, Davies Laboratory, PMB PO Aitkenvale, Qld 4814, Australia

Issue 14/4 (2002)

Tony Davies

External Professor, University of Glamorgan, UK. c/o Creon Lab Control AG, Europaallee 27-29, 50226 Frechen, Germany

Issue 14/3 (2002)

Tony M.C. Davies

Norwich Near Infrared Consultancy, 75 Intwood Road, Cringleford, Norwich NR4 6AA,UK

Tom Fearn

Department of Statistical Science, University College London, Gower Street, London

Issue 14/2 (2002)

Tony Davies

External Professor, University of Glamorgan, UK c/o Creon Lab Control AG, Europaallee 27–29, 50226 Frechen, Germany

Issue 14/1 (2002)

Tony Davies

Norwich Near Infrared Consultancy , 75 Intwood Road, Cringleford, Norwich NR4 6AA, UK

Tom Fearn

Department of Statistical Science, University College London, Gower Street, London,WC1E 6BT, UK

Issue 13/6 (2001)

Antony N. Davies

External Professor, University of Glamorgan,Wales, UK, and Institute of Spectrochemistry and Applied Spectroscopy, Dortmund, Germany

Issue 13/5 (2001)

Tony Davies

Norwich Near Infrared Consultancy, 75 Intwood Road, Cringleford, Norwich NR4 6AA, UK

Tom Fearn

Department of Statistical Science, University College London, Gower Street, London WC1E 6BT, UK

Issue 13/4 (2001)

Editor: Antony N. Davies

Photo of Tony daviesThe Tony Davies Column covers a wide range of topics of interest to spectroscopists in both industry and academe, with an emphasis on data handling and processing. Read more about the Column Editor.

Back to Basics: An Introduction to Chemometrics