Plotting of Spectra

Spectrum plots are commonly x–y plots in which the x-axis represents the wavelength and the y-axis represents intensity of a spectrum's signal. The function allows to plot a spectrum or several spectra in a single plot, identified either by an id (for example, the samples or spectra id) or by a target variable (for example, the concentration of a chemical element).

Usage

plotSpec(x, id = NULL, colvar = NULL, .interactive = FALSE, drop_na = FALSE)

Arguments

x

data frame or tibble of the spectra.

id

optional (NULL by default). Column name of a factor variable that identified each spectrum.

colvar

optional (NULL by default). Column name of a numeric variable to be display in color scale.

.interactive

optional (FALSE by default). When set to TRUE enables interactive plot.

drop_na

Optional (FALSE by default). Remove rows with NA intensity if drop_na is TRUE.

Value

Object of class ggplot or of class plotly if .interactive = TRUE.

Details

This function is based on the ggplot2 package, thus allowing users to easily add or modify different components of the plot.

Author

Christian L. Goueguel