runDESeq2: Run differential expression analysis based on DESeq2

Description Usage Arguments Value

Description

The function provides a reference implementation of differential expression analysis using DESeq. It is possible to replace this function by any other method generating at least the log2 fold change, a p-value and an IHW p-value for each unique sequence to be compatible with downstream functions.

Usage

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runDESeq2(count_table, pheno_info, design, contrast, effect_name,
  shrink_type = "normal", out_dir, prefix = "DESeq2")

Arguments

count_table

The count table generated by createCountTableFromFastQs

pheno_info

A data frame with sample identifiers as row names including the columns used for the design formula. The sample identifiers must be identical to those in the count_table.

design

Design formula for differential expression analysis

contrast

Argument to specify the comparison for which the results table will be generated (corresponds to 'contrast' argument in results and lfcShrink). Required if interaction terms are part of the design formula.

effect_name

Argument to specify the comparision for which the results table will be generated (corresponds to 'name' argument in results and 'coef' argument in lfcShrink). Required if interaction terms are part of the design formula.

shrink_type

DESeq2 shrinkage estimator (corresponds to 'type' argument in lfcShrink).

out_dir

Directory to save sample distance map, PCA and MA plot.

prefix

Prefix for the names of the PDF files containing the sample distance map, the PCA and the MA plot.

Value

Returns a list consisting of 'normCounts' and the 'deResult'. 'normCounts' is a data frame of normalized counts with sequences as row names. 'deResult' is a data frame with sequences as row names and the columns 'pvalue', 'padj', 'baseMean', 'log2FoldChange', 'lfcSE', 'stat', 'IHWPval'. See results and ihw.default for further documentation on the columns.


timjeske/DEUS documentation built on June 6, 2019, 12:59 p.m.