A class-information-based penalized matrix decomposition for identifying plants core genes responding to abiotic stresses.
In terms of making genes expression data more interpretable and comprehensible, there exists a significant superiority on sparse methods. Many sparse methods, such as penalized matrix decomposition (PMD) and sparse principal component analysis (SPCA), have been applied to extract plants core genes....
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2014
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oai:doaj.org-article:b3228c151a3e4e1a85e0d3322838c5752021-11-25T06:02:27ZA class-information-based penalized matrix decomposition for identifying plants core genes responding to abiotic stresses.1932-620310.1371/journal.pone.0106097https://doaj.org/article/b3228c151a3e4e1a85e0d3322838c5752014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/25180509/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203In terms of making genes expression data more interpretable and comprehensible, there exists a significant superiority on sparse methods. Many sparse methods, such as penalized matrix decomposition (PMD) and sparse principal component analysis (SPCA), have been applied to extract plants core genes. Supervised algorithms, especially the support vector machine-recursive feature elimination (SVM-RFE) method, always have good performance in gene selection. In this paper, we draw into class information via the total scatter matrix and put forward a class-information-based penalized matrix decomposition (CIPMD) method to improve the gene identification performance of PMD-based method. Firstly, the total scatter matrix is obtained based on different samples of the gene expression data. Secondly, a new data matrix is constructed by decomposing the total scatter matrix. Thirdly, the new data matrix is decomposed by PMD to obtain the sparse eigensamples. Finally, the core genes are identified according to the nonzero entries in eigensamples. The results on simulation data show that CIPMD method can reach higher identification accuracies than the conventional gene identification methods. Moreover, the results on real gene expression data demonstrate that CIPMD method can identify more core genes closely related to the abiotic stresses than the other methods.Jin-Xing LiuJian LiuYing-Lian GaoJian-Xun MiChun-Xia MaDong WangPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 9, p e106097 (2014) |
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Medicine R Science Q Jin-Xing Liu Jian Liu Ying-Lian Gao Jian-Xun Mi Chun-Xia Ma Dong Wang A class-information-based penalized matrix decomposition for identifying plants core genes responding to abiotic stresses. |
description |
In terms of making genes expression data more interpretable and comprehensible, there exists a significant superiority on sparse methods. Many sparse methods, such as penalized matrix decomposition (PMD) and sparse principal component analysis (SPCA), have been applied to extract plants core genes. Supervised algorithms, especially the support vector machine-recursive feature elimination (SVM-RFE) method, always have good performance in gene selection. In this paper, we draw into class information via the total scatter matrix and put forward a class-information-based penalized matrix decomposition (CIPMD) method to improve the gene identification performance of PMD-based method. Firstly, the total scatter matrix is obtained based on different samples of the gene expression data. Secondly, a new data matrix is constructed by decomposing the total scatter matrix. Thirdly, the new data matrix is decomposed by PMD to obtain the sparse eigensamples. Finally, the core genes are identified according to the nonzero entries in eigensamples. The results on simulation data show that CIPMD method can reach higher identification accuracies than the conventional gene identification methods. Moreover, the results on real gene expression data demonstrate that CIPMD method can identify more core genes closely related to the abiotic stresses than the other methods. |
format |
article |
author |
Jin-Xing Liu Jian Liu Ying-Lian Gao Jian-Xun Mi Chun-Xia Ma Dong Wang |
author_facet |
Jin-Xing Liu Jian Liu Ying-Lian Gao Jian-Xun Mi Chun-Xia Ma Dong Wang |
author_sort |
Jin-Xing Liu |
title |
A class-information-based penalized matrix decomposition for identifying plants core genes responding to abiotic stresses. |
title_short |
A class-information-based penalized matrix decomposition for identifying plants core genes responding to abiotic stresses. |
title_full |
A class-information-based penalized matrix decomposition for identifying plants core genes responding to abiotic stresses. |
title_fullStr |
A class-information-based penalized matrix decomposition for identifying plants core genes responding to abiotic stresses. |
title_full_unstemmed |
A class-information-based penalized matrix decomposition for identifying plants core genes responding to abiotic stresses. |
title_sort |
class-information-based penalized matrix decomposition for identifying plants core genes responding to abiotic stresses. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2014 |
url |
https://doaj.org/article/b3228c151a3e4e1a85e0d3322838c575 |
work_keys_str_mv |
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