Multivariate analysis and preprocessing of spectral data: data_der=invder(data) - File Exchange

Code covered by the BSD License

Highlights from
Multivariate analysis and preprocessing of spectral data

spectral_mva(varargin) SPECTRAL_MVA M-file for spectral_mva.fig
[BE,I]=vms_sp_read(filename,p... function [BE,I]=vms_sp_read(filename,pl);
[BE,I]=vms_sp_read_casa(filen... function [BE,I]=vms_sp_read_casa(filename,pl);
[X_sh, sp_sh]=shift_spectra_d... function [X_sh, sp_sh]=shift_spectra_diff(spectra, X);
[purspec,purint,purity_spec]=... function [purspec,purint,purity_spec]=simplisma(data,varlist,offset,n,data2);
[x_sh, y_sh]=shift_spectra(sp...
[x_sh, y_sh]=shift_spectra_or... function [x_sh, y_sh]=shift_spectra_or(spectra, X,C);
data_der=invder(data) data_der=invder(data)
indd=match(x,y, tol,bro)
reverplot(BE,I) script to plot binding energy BE axis in reverse order
uigetfiles.m
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from Multivariate analysis and preprocessing of spectral data by Kateryna Artyushkova
GUI for MVA of spectral data including various preprocessing options and three types of MVA analysis

data_der=invder(data)

function data_der=invder(data)
% data_der=invder(data)
% inverse 2nd derivative for making data2 matrix for simplisma

% written by K.Artyushkova
%7/7/1999

[n,m]=size(data);
[data2,cm] = savgol(data,17,3,2);
data_der=(-1)*data2;
for i=1:n
   for j=1:m
      if data_der(i,j)<=0,
         data_der(i,j)=0;
      end
   end
end

Highlights from Multivariate analysis and preprocessing of spectral data

Highlights from
Multivariate analysis and preprocessing of spectral data