featdata: Obtain Feature Metadata

In hhabra/Combiner: Method for Combining LC-MS Metabolomics Feature Measurements

Obtain Feature Metadata

Description

This method retrieves all feature meta-data or that of one data set. The rowIDs identically correspond to the rows from the combinedTable data frame.

Usage

featData(object, data = NULL)

## S4 method for signature 'metabCombiner'
featData(object, data = NULL)

Arguments

object	a metabCombiner object
data	character dataset identifier

Details

metabCombiner objects organized metabolomics feature information in the "featData" slot. This table and method is primarily useful for alignment analyses involving three or more data sets.

Value

data frame of feature metadata from one or all datasets

Examples

data(plasma30)
data(plasma20)

p30 <- metabData(head(plasma30,500), samples = "CHEAR")
p20 <- metabData(head(plasma20,500), samples = "Red")

p.comb <- metabCombiner(p30, p20, xid = "p30", yid = "p20")

#full metadata extraction
fdata <- featData(p.comb, data = NULL)

#single dataset feature information extraction
fdata <- featData(p.comb, data = "p20")

hhabra/Combiner documentation built on June 5, 2024, 10:56 a.m.