findBandsFIA {proFIA} | R Documentation

## Detect band in a FIA acquisition

### Description

Detect bands of points with similar mass in conscutive scans. Points may be moved if a better candidates is found.

### Usage

    findBandsFIA(xraw, firstScan = 1, lastScan = length(xraw@scantime),
      ppm = 2, sizeMin = NULL, dmz = 5e-04, beginning = NULL, end = NULL,
      nIso = 3, fracMin = 0.6)

### Arguments

`xraw` | An xcmsRaw object as returned by `xcmsRaw`.
`firstScan` | The first scan to be considered, 1 for general use.
`lastScan` | The last scan to be considered.
`ppm` | The mass deviation in ppm for point in consecutives scans.
`sizeMin` | The minimum size of a band.
`dmz` | The minimum mass tolerance,useful for small masses
`beginning` | The scan of the injection. May be determined using `determiningInjectionZone`.
`end` | The end of injection, may be estimated using `determiningInjectionZone`.
`nIso` | The minimum number of consecutive points for a signal to be detected.
`fracMin` | The minimum fraction of points necessary in beginning:end for a signal to be detected. contaminated by solvent.

### Value

A vector contaning the inject peak

### Examples

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

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

      #Getting the injection scan
      gp<-determiningInjectionZone(xraw)

      #performing band detection.
      tbands<-findBandsFIA(xraw,ppm = 2,sizeMin = gp[3]-gp[1],beginning=gp[1],end=gp[2])
      head(tbands)
    }

[Package proFIA version 1.6.0 Index]