Reshape and optionally preprocess a trace matrix into long format

Usage

prep_table(
  data,
  rm.start = 0,
  preprocess = TRUE,
  transp = TRUE,
  add_t = TRUE,
  time_res
)

data: Numeric matrix of fluorescence traces (cells × frames), with an optional leading ID column.
rm.start: Integer; number of initial time points to remove. Defaults to 0.
preprocess: Logical; if TRUE, calls preprocess_data() to smooth and detrend. Defaults to TRUE.
transp: Logical; if TRUE, transposes data before processing. Defaults to TRUE.
add_t: Logical; if TRUE, adds a time column based on time_res. Defaults to TRUE.
time_res: Numeric; temporal resolution in hours per frame.

A long-format data.table with columns ID, t, value, and smooth.