Entropy-based gene ranking without selection bias for the predictive classification of microarray data.
Entropy-based gene ranking without selection bias for the predictive classification of microarray data.
复制标题
DOI:
10.1186/1471-2105-4-54
复制
发表时间:
2003-11-06
影响因子:
3
通讯作者:
Jurman G
中科院分区:
文献类型:
--
作者:
Furlanello C;Serafini M;Merler S;Jurman G
We describe the E-RFE method for gene ranking, which is useful for the identification of markers in the predictive classification of array data. The method supports a practical modeling scheme designed to avoid the construction of classification rules based on the selection of too small gene subsets (an effect known as the selection bias, in which the estimated predictive errors are too optimistic due to testing on samples already considered in the feature selection process). With E-RFE, we speed up the recursive feature elimination (RFE) with SVM classifiers by eliminating chunks of uninteresting genes using an entropy measure of the SVM weights distribution. An optimal subset of genes is selected according to a two-strata model evaluation procedure: modeling is replicated by an external stratified-partition resampling scheme, and, within each run, an internal K-fold cross-validation is used for E-RFE ranking. Also, the optimal number of genes can be estimated according to the saturation of Zipf's law profiles. Without a decrease of classification accuracy, E-RFE allows a speed-up factor of 100 with respect to standard RFE, while improving on alternative parametric RFE reduction strategies. Thus, a process for gene selection and error estimation is made practical, ensuring control of the selection bias, and providing additional diagnostic indicators of gene importance.
登录
查看更多内容
影响因子:
5.8
作者:
Nguyen, DV;Rocke, DM
通讯作者:
Rocke, DM
影响因子:
8.6
作者:
Furusawa, C;Kaneko, K
通讯作者:
Kaneko, K
影响因子:
64.8
作者:
Alizadeh, AA;Eisen, MB;Staudt, LM
通讯作者:
Staudt, LM
影响因子:
2
作者:
Li, WT;Yang, YN
通讯作者:
Yang, YN
DOI:
10.1084/jem.20021726
发表时间:
2003-06-02
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Kari L;Loboda A;Nebozhyn M;Rook AH;Vonderheid EC;Nichols C;Virok D;Chang C;Horng WH;Johnston J;Wysocka M;Showe MK;Showe LC
通讯作者:
Showe LC