SpectralSlope: Generate the spectral slope for CDOM samples

In RichardLaBrie/paRafac_correction: Corrects EEM all at once before using Matlab for PARAFAC

Generate the spectral slope for CDOM samples

Description

This function reads any number of CDOM files and calculate their spectral slope. You have to manually load DOC file for SUVA Wavelengths chosen based on Helms 2008 Calculate spectral slope with a reference wavelength The model use a nonlinear least square fitting routine The equation is abs = abs0 * exp(-S(wavelength - ref.wavelength)) + K as in Markager & Vincent 2000 where abs is the absorption coef, abs0 is the reference absorption coef at wavelenth and ref.wavelength S is the slope and K is an additional background parameter to allow baseline to shift

Usage

SpectralSlope(
  data.file = "data",
  FileSelect = F,
  wl0 = 375,
  From = 275,
  To = 650,
  By = 1,
  skip = 1
)

Arguments

FileSelect	is a logical parameter to allow you which file to load. Default is FALSE, meaning that all files in /CDOM will be loaded
wl0	is the reference wavelength, default is 375 as in Stedmon, Markager and Kaas 2000
To	is the wavelenth at which you want to end calculating the exponential fit
By	is the step between each wavelength
skip	is a parameter to determine how many lines will be skiped before the header in the absorbance files
FROM	is the wavelenth at which you want to start calculating the exponential fit

RichardLaBrie/paRafac_correction documentation built on March 13, 2023, 2:11 p.m.