Apply Savitzky-Golay filter row-wise to a spectral matrix
Usage
apply_sg_matrix(M, m = 11, p = 2, d = 0)
Arguments
- M
Numeric matrix (rows = samples, cols = wavelengths)
- m
Half-window size (total window = 2m+1)
- p
Polynomial order
- d
Derivative order (0 = smooth, 1 = first derivative)
Value
Filtered matrix; on error, returns input unchanged
