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2003
Springer

Threshold extraction in metabolite concentration data

9 years 8 months ago
Threshold extraction in metabolite concentration data
The further development of analytical techniques based on gas chromatography and mass spectrometry now facilitate the generation of larger sets of metabolite concentration data. These are a prime source for the study of metabolic behaviour under different environmental conditions. In order to study the impact of environmental stimuli on organisms it is helpful to know about discrete states the concentrations adopt. A straightforward method to recognize such states is the identification of modes in the individual distributions of concentration variables. However, this approach does not fit well noisy, sparse or ambiguous data. General techniques for finding discretisation thresholds in continuous data also prove to be practically insufficient to detect states due to the weak conditional dependencies in the data. We address this problem by identifying significant thresholds in single variables through a global survey considering all variables. The technique is based upon a comparis...
André Flöter, Jacques Nicolas, Torsten
Added 06 Jul 2010
Updated 06 Jul 2010
Type Conference
Year 2003
Where GCB
Authors André Flöter, Jacques Nicolas, Torsten Schaub, Joachim Selbig
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