| FindPeaks {TargetSearch} | R Documentation |
This function extracts the maximum intensity of a list of masses in a given RI window.
FindPeaks(my.files, refLib,
columns = c("SPECTRUM", "RETENTION_TIME_INDEX", "RETENTION_TIME"),
showProgressBar = FALSE)
my.files |
A character vector naming RI files to be searched. |
refLib |
A numeric matrix with three columns or a list of three column matrices. The second column contains the masses and the first and third column contains the RI limits. |
columns |
A numeric vector with the positions of the columns |
showProgressBar |
Logical. Should the progress bar be displayed? |
The reference library parameter refLib can be either a single
three-column matrix or a list of such matrices. If it is a list, the length
must match the length of my.files. In this case, every component will
be used to iteratively search in the corresponding file.
The RI files format can be either "text" or "binary". The type is detected dinamically.
A tsMSdata object.
This is an internal function not intended to be invoked directly.
Alvaro Cuadros-Inostroza, Matthew Hannah, Henning Redestig
medianRILib, sampleRI,
peakFind, tsMSdata
# load example CDF files
require(TargetSearchData)
# load pre-calculated example data and objects
data(TSExample)
# get RI file path
RI.path <- file.path(find.package("TargetSearchData"), "gc-ms-data")
# update RI file path
RIpath(sampleDescription) <- RI.path
my.files <- RIfiles(sampleDescription)
# make a three column matrix: lower RI, mass, upper RI
refLib <- refLib(refLibrary)
head(refLib)
# extract the peaks
peaks <- FindPeaks(my.files, refLib)