findEIC: Extract EICs
In RMassBank: Workflow to process tandem MS files and build MassBank records

Description Usage Arguments Value Author(s) See Also

Extract EICs from raw data for a determined mass window.

findEIC(
  msRaw,
  mz,
  limit = NULL,
  rtLimit = NA,
  headerCache = NULL,
  floatingRecalibration = NULL,
  peaksCache = NULL,
  polarity = NA,
  msLevel = 1,
  precursor = NULL
)

`msRaw`	The mzR file handle
`mz`	The mass or mass range to extract the EIC for: either a single mass (with the range specified by `limit` below) or a mass range in the form of `c(min, max)`.
`limit`	If a single mass was given for `mz`: the mass window to extract. A limit of 0.001 means that the EIC will be returned for `[mz - 0.001, mz + 0.001]`.
`rtLimit`	If given, the retention time limits in form `c(rtmin, rtmax)` in seconds.
`headerCache`	If present, the complete `mzR::header(msRaw)`. Passing this value is useful if spectra for multiple compounds should be extracted from the same mzML file, since it avoids getting the data freshly from `msRaw` for every compound.
`floatingRecalibration`	A fitting function that `predict()`s a mass shift based on the retention time. Can be used if a lockmass calibration is known (however you have to build the calibration yourself.)
`peaksCache`	If present, the complete output of `mzR::peaks(msRaw)`. This speeds up the lookup if multiple compounds should be searched in the same file.