Title
Evolutionary search for improved path diagrams
Abstract
A path diagram relates observed, pairwise, variable correlations to a functional structure which describes the hypothesized causal relations between the variables. Here we combine path diagrams, heuristics and evolutionary search into a system which seeks to improve existing gene regulatory models. Our evaluation shows that once a correct model has been identified it receives a lower prediction error compared to incorrect models, indicating the overall feasibility of this approach. However, with smaller samples the observed correlations gradually become more misleading, and the evolutionary search increasingly converges on suboptimal models. Future work will incorporate publicly available sources of experimentally verified biological facts to computationally suggest model modifications which might improve the model's fitness.
Year
DOI
Venue
2007
10.1007/978-3-540-71783-6_11
EvoBIO
Keywords
Field
DocType
improved path diagram,suboptimal model,biological fact,correct model,incorrect model,available source,evolutionary search,path diagram,regulatory model,observed correlation,model modification,prediction error
Pairwise comparison,Mean squared prediction error,Path coefficient,Causal relations,Computer science,Diagram,Heuristics,Artificial intelligence,Gene regulatory network,Machine learning
Conference
Volume
ISSN
Citations 
4447
0302-9743
0
PageRank 
References 
Authors
0.34
7
6
Name
Order
Citations
PageRank
Kim Laurio1233.24
Thomas Svensson252.47
Mats Jirstrand320623.75
Patric Nilsson471.80
Jonas Gamalielsson58113.11
Björn Olsson68222.82