plot.GCalign function

Plot diagnostics for an GCalign Object

Visualises the aligned data based on four diagnostic plots. One plot shows the distribution of peak numbers per sample in the raw data and after alignment. A second plot gives the distribution of linear shifts that were applied in order to conduct a full alignment of samples with respect to reference. A third sample gives a distribution of the variation in retention times of homologous peaks. The fourth plot shows a frequency distribution of peaks shared among samples.

## S3 method for class 'GCalign'
plot(
  x,
  which_plot = c("all", "shifts", "variation", "peak_numbers", "peaks_shared"),
  ...
)

Arguments

• x: Object of class GCalign, created with align_chromatograms
• which_plot: A character defining which plot is created. Options are "shifts", "variation", "peak_numbers" and "peaks_shared". By default all four are created.
• ...: Optional arguments passed on to methods. See plot, hist and barplot. Note that optional arguments are not passed on when plotting all figures.

Returns

Depending on the selected plot a data frame containing the data source of the respective plot is returned. If all plots are created, no output will be returned.

Examples

## GCalign object
data("aligned_peak_data")

## All plots are shown by default
plot(aligned_peak_data)

## Distribution of peak numbers
plot(aligned_peak_data, which_plot = "peak_numbers")

## variation of retention times
plot(aligned_peak_data, which_plot = "variation")

Author(s)

Martin Stoffel (martin.adam.stoffel@gmail.com) & Meinolf Ottensmann (meinolf.ottensmann@web.de)