rtdata {metabCombiner} | R Documentation

## Retrieve Retention Time Values

### Description

This retrieves feature RT values from one or all constituent dataset features of a `metabCombiner` object. Alternatively, the average RT value can be retrieved.

### Usage

    rtdata(object, data = NULL, value = c("obs", "mean"))

    ## S4 method for signature 'metabCombiner'
    rtdata(object, data = NULL, value = c("obs", "mean"))

### Arguments

`object` | `metabCombiner` object
`data` | dataset identifier to extract information from; if NULL, extracts information from all datasets
`value` | Either"obs" (observed - default option) or "mean"

### Value

data frame or vector of retention time values

### 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")

    ##retrieve all RTs
    rt <- rtdata(p.comb, data = NULL)

    ##retrieve RTs from p30
    rt <- rtdata(p.comb, data = "p30")

    ##retrieve mean RT
    rt <- rtdata(p.comb, value = "mean")

[Package metabCombiner version 1.2.2 Index]