Plot one or more spectra from a data frame
Usage
plot_spectra(
df,
sample_ids = NULL,
id_col = "Soil_ID",
xlab = NULL,
ylab = "Response",
colour_by = NULL,
family = NULL,
title = "Spectra",
alpha = 0.7
)Arguments
- df
Data frame with Soil_ID column and numeric spectral columns
- sample_ids
Character vector of Soil_IDs to plot. If NULL, plots all.
- id_col
Name of the sample ID column (default "Soil_ID")
- xlab
X-axis label; auto-detected if NULL ("Wavelength (nm)" or "Wavenumber (cm-1)")
- ylab
Y-axis label (default "Response")
- colour_by
Name of a non-spectral column to colour lines by; NULL for a single colour
- family
Family list (from model_registry) used to draw the model grid range as dashed vertical lines. Pass NULL to skip.
- title
Plot title (default: "Spectra")
- alpha
Line transparency (default 0.7)