function m = fmatrix(file,offset)% m = fmatrix(file,[offset])% constructs a cell array of struct of (id, cnt) array.% file   : file of feature data% offset : offset of initial feature id (specify 1 if you use zero-origin id)% m      : cell array of data, each cell d is a struct of {d.id, d.cnt},%          each of which is an array of ids and corresponding counts.%          e.g. d.id(1) = 5, d.cnt(1) = 2%               d.id(2) = 1, d.cnt(2) = 10 ..% $Id: fmatrix.m,v 1.6 2004/10/26 02:23:37 dmochiha Exp $if nargin < 2  offset = 0;end% open filefid = fopen(file);if (fid == -1)  error(sprintf('fmatrix: can''t open %s.',file));endm = {};j = 0;% read filewhile ~feof(fid)  l = fgetl(fid);  f = sscanf(l,'%d:%g',Inf);  n = length(f) / 2;  assert(isint(n));  d.id  = zeros(1,n);  d.cnt = zeros(1,n);  for i = 1:n    d.id(i)  = f(2*i-1) + offset;    d.cnt(i) = f(2*i);  end  j = j + 1;  m{j} = d;end% close filefclose(fid);