function table = probelibraryinfo(CELStruct,CDFStruct)
% PROBELIBRARYINFO extracts probe set library information for probe results
%
%   PROBEINFO = PROBELIBRARYINFO(CELStruct,CDFStruct) creates a table of
%   information linking the probe data in a CEL file structure with probe
%   set information from a CDF file structure.
%
%   PROBEINFO is a matrix with three columns and the same number of rows as
%   the probes field of the CELStruct. The first column is the index of the
%   probe set to which the probe belongs. The second column contains the
%   probe pair number, and the third column indicates whether the probe is
%   a perfect match (1) or mismatch (-1) probe. Probes that do not
%   correspond to a probe set in the CDF library file have probe set ID 0.
%
%   Note that Affymetrix probe pair indexing is 0-based but MATLAB
%   indexing is 1-based. The output from PROBELIBRARYINFO is 1-based.
%
%   Example:
%       celStruct = affyread('Drosophila-121502.cel');
%       cdfStruct = affyread(...
%                    'D:\Affymetrix\LibFiles\DrosGenome1\DrosGenome1.CDF');
%       probeinfo = probelibraryinfo(celStruct,cdfStruct);
%       % Find out which probe set the 1104th probe belongs to.
%       cdfStruct.ProbeSets(probeinfo(1104,1)).Name
%
%   See also AFFYREAD, PROBESETLINK, PROBESETLOOKUP, PROBESETVALUES.

%   Affymetrix and NetAffx are registered trademarks of Affymetrix, Inc.

% Copyright 2003-2004 The MathWorks, Inc.
% $Revision: 1.1.12.1 $   $Date: 2004/12/24 20:44:57 $ 

numCols = max(CELStruct.Probes(:,1))+1;

numProbeSets = numel(CDFStruct.ProbeSets);
table = zeros(size(CELStruct.Probes,1),3);

for count = 1:numProbeSets
    NumPairs = CDFStruct.ProbeSets(count).NumPairs;
    thePairs = CDFStruct.ProbeSets(count).ProbePairs;
    for inner = 1:NumPairs
        PMX = thePairs(inner,3);
        PMY = thePairs(inner,4);
        PMRow = PMY*numCols + PMX +1;
        table(PMRow,:) = [count,inner,1];
        MMX = thePairs(inner,5);
        MMY = thePairs(inner,6);
        MMRow = MMY*numCols + MMX + 1;
        table(MMRow,:) = [count,inner,-1];
    end

end