getChromatogramIndices: Get chromatogram indices of precursors.

View source: R/merge_osw_mzml.R

getChromatogramIndicesR Documentation

Get chromatogram indices of precursors.

Description

This function reads the header of chromatogram files. It then fetches chromatogram indices by matching transition_id(osw) with chromatogramID(xics).

Usage

getChromatogramIndices(fileInfo, precursors, mzPntrs, applyFun = lapply)

Arguments

fileInfo

(data-frame) Output of getRunNames function.

precursors

(data-frame) Atleast two columns transition_group_id and transition_ids are required.

mzPntrs

A list of mzRpwiz.

applyFun

(function) value must be either lapply or BiocParallel::bplapply.

Value

(list) A list of dataframes having following columns:

transition_group_id

(string) it is PRECURSOR.ID from osw file.

chromatogramIndex

(integer) index of chromatogram in mzML file.

Author(s)

Shubham Gupta, shubh.gupta@mail.utoronto.ca

ORCID: 0000-0003-3500-8152

License: (c) Author (2019) + GPL-3 Date: 2019-04-07

See Also

chromatogramIdAsInteger, mapPrecursorToChromIndices

Examples

dataPath <- system.file("extdata", package = "DIAlignR")
fileInfo <- getRunNames(dataPath = dataPath)
precursors <- getPrecursors(fileInfo, oswMerged = TRUE, context = "experiment-wide")
mzPntrs <- getMZMLpointers(fileInfo)
prec2chromIndex <- getChromatogramIndices(fileInfo, precursors, mzPntrs)
for(mz in mzPntrs) DBI::dbDisconnect(mz)

shubham1637/DIAlign documentation built on March 27, 2023, 7:12 a.m.