Analyzing volatile compound measurements using traditional multivariate techniques and Bayesian networks : a thesis presented in partial fulfillment of the requirements for the degree of Master of Arts in Statistics at Massey University, Albany, New Zealand

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dc.contributor.authorBaldawa, Shweta
dc.date.accessioned2010-03-23T00:26:19Z
dc.date.available2010-03-23T00:26:19Z
dc.date.issued2009
dc.description.abstractThe purpose of this project is to compare two statistical approaches, traditional multivariate analysis and Bayesian networks, for representing the relationship between volatile compounds in kiwifruit. Compound measurements were for individual vines which were progeny of an intercross. It was expected that groupings in the data (or compounds) would give some indication of the generic nature of the biochemical pathways. Data for this project was provided by the Flavour Biotech team at Plant and Food Research. This data contained many non-detected observations which were treated as zero and to deal with them, we looked for appropriate value of c for data transformation in log(x+c). The data is ‘large p small n’ paradigm – and has much in common with data, although it is not as extreme as microarray. Principal component analysis was done to select a subset of compounds that retained most of the multivariate structure for further analysis. The reduced set of data was analyzed by Cluster analysis and Bayesian network techniques. A heat map produced by Cluster analysis and a graphical representation of Bayesian networks were presented to scientists for their comments. According to them, the two graphs complemented each other; both graphs were useful in their own unique way. Along with clusters of compounds, clusters of genotypes were represented by the heat map which showed by how much a particular compound is present in each genotype while the relation among different compounds was seen from the Bayesian networks.en_US
dc.identifier.urihttp://hdl.handle.net/10179/1198
dc.language.isoenen_US
dc.publisherMassey Universityen_US
dc.rightsThe Authoren_US
dc.subjectMultivariate analysisen_US
dc.subjectBayesian networksen_US
dc.subjectVolatile compounds in kiwifruiten_US
dc.subject.otherFields of Research::230000 Mathematical Sciences::230200 Statistics::230204 Applied statisticsen_US
dc.titleAnalyzing volatile compound measurements using traditional multivariate techniques and Bayesian networks : a thesis presented in partial fulfillment of the requirements for the degree of Master of Arts in Statistics at Massey University, Albany, New Zealanden_US
dc.typeThesisen_US
massey.contributor.authorBaldawa, Shweta
thesis.degree.disciplineStatisticsen_US
thesis.degree.grantorMassey Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Arts (M.A.)en_US
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