Direct estimation of differential networks.
Direct estimation of differential networks.
复制标题
DOI:
10.1093/biomet/asu009
复制
发表时间:
2014-06
期刊:
影响因子:
2.7
通讯作者:
Li H
中科院分区:
文献类型:
--
作者:
Zhao SD;Cai TT;Li H
It is often of interest to understand how the structure of a genetic network differs between two conditions. In this paper, each condition-specific network is modeled using the precision matrix of a multivariate normal random vector, and a method is proposed to directly estimate the difference of the precision matrices. In contrast to other approaches, such as separate or joint estimation of the individual matrices, direct estimation does not require those matrices to be sparse, and thus can allow the individual networks to contain hub nodes. Under the assumption that the true differential network is sparse, the direct estimator is shown to be consistent in support recovery and estimation. It is also shown to outperform existing methods in simulations, and its properties are illustrated on gene expression data from late-stage ovarian cancer patients.
登录
查看更多内容
影响因子:
4.3
作者:
Hudson NJ;Reverter A;Dalrymple BP
通讯作者:
Dalrymple BP
影响因子:
14.9
作者:
Kanehisa M;Goto S;Sato Y;Furumichi M;Tanabe M
通讯作者:
Tanabe M
影响因子:
2.2
作者:
Chiquet, Julien;Grandvalet, Yves;Ambroise, Christophe
通讯作者:
Ambroise, Christophe
影响因子:
1.1
作者:
Lounici, Karim
通讯作者:
Lounici, Karim
影响因子:
2.5
作者:
Cai, Tony Tony;Wang, Lie;Xu, Guangwu
通讯作者:
Xu, Guangwu