determiningInjectionZone {proFIA} | R Documentation

## First guess of the limit of the injection peak.

### Description

Determine a first approximation of the injection peak based on the angle of the injection peak and changing of variation. This peak is not used directly by findFIAsignal, but will be used to initialize the regression giving the injection peak. Shloud be used carefuly.

### Usage

    determiningInjectionZone(
      xraw,
      threshold = 0.05,
      graphical = FALSE,
      scanmin = NULL,
      scanmax = NULL
    )

### Arguments

`xraw` | An xcmsRaw object as returned by `xcmsRaw`. It may also be a TIC sequence as a list scan intensity.
`threshold` | A relative increase born to detect the limit of the injection peak.
`graphical` | should the resulting limit be plotted.
`scanmin` | The first scan to consider.
`scanmax` | The last scan to consider.

### Value

A triplet composed of c(left limit,right limit, maximum) of the estimated injection peak.

### Examples

    if(require(plasFIA)){
      #Getting the path of a file.
      path_raw <- list.files(system.file(package="plasFIA","mzML"),full.names=TRUE)[2]

      #Opening the file with xcms
      xraw <- xcmsRaw(path_raw)

      #Getting a first approximation of injection peak;
      sp <- determiningInjectionZone(xraw)
    }

[Package proFIA version 1.18.0 Index]