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cvuCell2Mat.m
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cvuCell2Mat.m
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% cvuCell2Mat - (CV Utility) Conversion of training data representation
%
% Synopsis
% [X C] = cvuCell2Mat(X)
%
% Description
% Convert a cell type training data representation into a matrix type.
% Cell type: X{i} is a feature matrix of class i, i = 1,...,c.
% Mat type: X is a feature matrix for all
% C is a matrix of class lables with respect to X.
%
% Inputs ([]s are optional)
% (cell) X c cell matrix of D x Ni matrix
% where D is the number of dimensions and Ni is the
% number of vectors for each i class.
%
% Outputs ([]s are optional)
% (matrix) X D x N matrix where D is the number of dimensions and
% N is the number of vectors, N = \sum_{i=1}^c Ni.
% (matrix) C 1 x N matrix containing class labels with respect to
% X, i.e., C(i) is the class label for X(:,i).
%
% See also
% cvuMat2Cell
% Authors
% Naotoshi Seo <sonots(at)sonots.com>
%
% License
% The program is free to use for non-commercial academic purposes,
% but for course works, you must understand what is going inside to use.
% The program can be used, modified, or re-distributed for any purposes
% if you or one of your group understand codes (the one must come to
% court if court cases occur.) Please contact the authors if you are
% interested in using the program without meeting the above conditions.
%
% Changes
% 01/28/2009 First Edition
function [X C] = cvuCell2Mat(X)
C = [];
for c = 1:length(X)
C = cat(2, C, ones(1, size(X{c},2))*c);
end
X = cell2mat(X);
end