FirstMin (X)

%function [fmin, fminpos ]= FirstMin (X)
%
%FirstMin will calculate the first minimum in a given row vector X. It
%return this local minimum in fmin as well as its position fminpos in X.

%The Biodata toolbox for MATLAB: a spectral database system for storing and
%processing spectra
%C 2004-2008, Kris De Gussem, Raman Spectroscopy Research Group, Department
%of analytical chemistry, Ghent University
%C 2009 Kris De Gussem
%
%This file is part of Biodata.
%
%Biodata is free software: you can redistribute it and/or modify
%it under the terms of the GNU General Public License as published by
%the Free Software Foundation, either version 3 of the License, or
%(at your option) any later version.
%
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%MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
%GNU General Public License for more details.
%
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%along with Biodata.  If not, see <http://www.gnu.org/licenses/>.

%Copyright (c) 2004-2009, Kris De Gussem
%All rights reserved.
%
%Redistribution and use in source and binary forms, with or without 
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%met:
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function [fmin, fminpos ]= FirstMin (X)
for i = 1:size (X,2)-1 %suppose rowvector
    %searching for min: next value is higher
    if X(1, i) <= X(1, i+1)
        fmin = X(1,i);
        fminpos = i;
        return
    end
end

%normally already stopped, if not: last value = min
warning ('Biodata:msg', 'first minimum is last value');
fmin = X(1,size (X,2));
fminpos = size (X,2);