plot_VK_flat: plot_VK_flat

In robertyoung3/MSanalyzeNOM: Utilities for Analyzing Complex Natural Organic Matter (NOM) Mixtures After Formula Assignment

Description

This function makes a traditional van Krevelen diagram (H/c vs. O/C). This plot shows the distribution of the assigned formulas as a function of elemental ratios, but contains no information about the intensities of the detected ions. The darker areas are where the highest number of formulas are plotted.

Usage

plot_VK_flat(data, plot_title = "", panel = FALSE, var_panel, num_col = 2)

Arguments

data	a tibble containing the following column names: "HtoC" and "OtoC"
plot_title	a character string containing the sample name
panel	a logical value specifying whether a panel will be used (default = FALSE)
var_panel	a character string containing the column name specifying the factor variable to be used for faceting
num_col	an integer specifying the number of panel columns (default = 2)

Details

The area above the horizontal line at H/C = 1.5 is designated as the aliphatic region in accordance with D'Andrilli et al. 2015 and Lv et al. 2017. The area below the diagonal line from H/C = 1.1 is designated as the aromatic region based on a modified aromaticity index >= 0.5 in accordance with Koch & Dittmar 2006.

robertyoung3/MSanalyzeNOM documentation built on June 7, 2021, 7:46 a.m.