outputAnnotationFeatureMetadata_UI_helper {peakPantheR} | R Documentation

## UI export helper - feature metadata

### Description

Return a table with features as rows and all feature metadata as columns

### Usage

    outputAnnotationFeatureMetadata_UI_helper(annot)

### Arguments

`annot` | (peakPantheRAnnotation) Annotation object

### Value

(data.frame) Features metadata

### Examples

    ## Initialise a peakPantheRAnnotation object with 3 samples and 2 targeted
    ## compounds

    # Paths to spectra files
    spectraPaths <- c('./path/file1', './path/file2', './path/file3')

    # targetFeatTable
    targetFeatTable <- data.frame(matrix(vector(), 2, 8, dimnames=list(c(),
                        c('cpdID','cpdName','rtMin','rt','rtMax','mzMin','mz',
                        'mzMax'))), stringsAsFactors=FALSE)
    targetFeatTable[1,] <- c('ID-1', 'Cpd 1', 3310., 3344.888, 3390., 522.194778,
                            522.2, 522.205222)
    targetFeatTable[2,] <- c('ID-2', 'Cpd 2', 3280., 3385.577, 3440., 496.195038,
                            496.2, 496.204962)
    targetFeatTable[,c(3:8)] <- vapply(targetFeatTable[,c(3:8)], as.numeric,
                                        FUN.VALUE=numeric(2))

    emptyAnnotation <- peakPantheRAnnotation(spectraPaths=spectraPaths,
                                            targetFeatTable=targetFeatTable)

    # featureMetadata of an empty annotation
    outputAnnotationFeatureMetadata_UI_helper(emptyAnnotation)
    # data frame with 0 columns and 2 rows

[Package peakPantheR version 1.8.0 Index]