A fast algorithm for functional mapping of complex traits

Wei Zhao, Rongling Wu, Chang Xing Ma, George Casella

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


By integrating the underlying developmental mechanisms for the phenotypic formation of traits into a mapping framework, functional mapping has emerged as an important statistical approach for mapping complex traits. In this note, we explore the feasibility of using the simplex algorithm as an alternative to solve the mixture-based likelihood for functional mapping of complex traits. The results from the simplex algorithm are consistent with those from the traditional EM algorithm, but the simplex algorithm has considerably reduced computational times. Moreover, because of its nonderivative nature and easy implementation with current software, the simplex algorithm enjoys an advantage over the EM algorithm in the dynamic modeling and analysis of complex traits.

Original languageEnglish (US)
Pages (from-to)2133-2137
Number of pages5
Issue number4
StatePublished - Aug 2004

All Science Journal Classification (ASJC) codes

  • General Medicine


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