diffAnaVolcanoplot {DAPAR} | R Documentation

## Volcanoplot of the differential analysis

### Description

Plots a volcanoplot after the differential analysis. Typically, the log of Fold Change is represented on the X-axis and the log10 of the p-value is drawn on the Y-axis. When the `threshold_pVal` and the `threshold_logFC` are set, two lines are drawn respectively on the y-axis and the X-axis to visually distinguish between differential and non differential data.

### Usage

    diffAnaVolcanoplot(logFC = NULL, pVal = NULL, threshold_pVal = 1e-60,
      threshold_logFC = 0, conditions = NULL)

### Arguments

`logFC` | A vector of the log(fold change) values of the differential analysis.
`pVal` | A vector of the p-value values returned by the differential analysis.
`threshold_pVal` | A floating number which represents the p-value that separates differential and non-differential data.
`threshold_logFC` | A floating number which represents the log of the Fold Change that separates differential and non-differential data.
`conditions` | A list of the names of condition 1 and 2 used for the differential analysis.

### Value

A volcanoplot

### Author(s)

Florence Combes, Samuel Wieczorek

### Examples

    require(DAPARdata)
    data(Exp1_R25_pept)
    condition1 <- '25fmol'
    condition2 <- '10fmol'
    data <- wrapper.diffAnaLimma(Exp1_R25_pept[1:1000], condition1, condition2)
    diffAnaVolcanoplot(data$logFC, data$P_Value)

[Package DAPAR version 1.10.4 Index]