Plot and save downsampled temperature trace — plot_downsampled

Generates a line plot of downsampled temperature over common_dt, faceted by rfid, and writes it to output_dir/clean_plots/<basename>_downsampled.png.

Usage

plot_downsampled_temperature(df_down, output_dir, filepath)

Arguments

df_down: Data frame returned by downsample(). Must contain common_dt, temperature, and rfid.
output_dir: Directory where clean_plots/ will be created (if needed).
filepath: Original CSV path—used to derive the base filename for saving.

Value

Invisibly returns the ggplot object.