This function extracts the rubberband baseline from spectral data within a specified wavelength range. The rubberband method fits a baseline by connecting local minima points in the spectrum. It returns only the baseline, not the corrected data.
Usage
spec_bl_rubberband(
.data,
wn_col = NULL,
wn_min = NULL,
wn_max = NULL,
segment_length = 50,
smooth_baseline = TRUE,
is_abs = TRUE
)Arguments
- .data
A `data.frame` or `tibble` containing spectral data.
- wn_col
A character string specifying the column name for the wavelength data. Default is `"Wn"`.
- wn_min
A numeric value specifying the minimum wavelength to consider for the baseline correction.
- wn_max
A numeric value specifying the maximum wavelength to consider for the baseline correction.
- segment_length
A numeric value specifying the length of segments for finding local minima. Default is 50.
- smooth_baseline
A logical value indicating whether to smooth the baseline using spline interpolation. Default is TRUE.
- is_abs
A logical value indicating whether the data is already in absorbance. If `TRUE`, absorbance is used directly; if `FALSE`, the data is converted to absorbance before extracting the baseline.