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Batch-Effect

Batch-Effect

1.step1-normlize

数据:GSE83521_and_GSE89143 箱线图显示GSE89143第三个样本异常,使用limma::normalizeBetweenArrays处理过,发现效果不如剔除该样本。

将该样本剔除。

2.使用sva::ComBat()和limma::removeBatchEffect()分别去除批次效应并做对比

前图时sva,后图是limma

1.校正箱线图

image.png

2.PCA图

image.png image.png

3.火山图

image.png image.png

4.差异基因热图

image.png image.png

差异基因数量: sva:    down stable     up
   30   2108     52  limma:  down stable     up
   30   2099     61  阈值:p<0.05,|logfc|>1

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