voom: Precision weights unlock linear model analysis tools for RNA-seq read counts.

voom: Precision weights unlock linear model analysis tools for RNA-seq read counts.
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DOI:
10.1186/gb-2014-15-2-r29
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发表时间:
2014-02-03
期刊:
影响因子:
12.3
通讯作者:
Smyth GK
Smyth GK
中科院分区:
生物学1区
文献类型:
--
作者:
Law CW;Chen Y;Shi W;Smyth GK

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提出了用于分析来自RNA-seq实验的读段计数的新的正态线性建模策略。voom方法估计对数计数的均值-方差关系,为每个观测值生成精度权重,并将其输入到limma经验贝叶斯分析管道中。这为RNA-seq分析师提供了大量为微阵列开发的方法。模拟研究表明,即使数据是根据早期方法的假设生成的,voom的性能也与基于计数的RNA-seq方法一样好或更好。两个案例研究说明了线性建模和基因集测试方法的使用。
New normal linear modeling strategies are presented for analyzing read counts from RNA-seq experiments. The voom method estimates the mean-variance relationship of the log-counts, generates a precision weight for each observation and enters these into the limma empirical Bayes analysis pipeline. This opens access for RNA-seq analysts to a large body of methodology developed for microarrays. Simulation studies show that voom performs as well or better than count-based RNA-seq methods even when the data are generated according to the assumptions of the earlier methods. Two case studies illustrate the use of linear modeling and gene set testing methods.
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