How to replace MATLABPOOL to PARPOOL ?

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Hello guys.

I run a Parallel Toolbox coding which is annkmeans.m. In this coding, I found that, it still used the matlabpool command. Since MATLAB has removed this command and replaced with parpool, anyone knows how to change it? (refer: numChunks)

% chunk the data up
numData = size(X,2) ;
if opts.parallel
  numChunks = max(matlabpool('size'), 1) ;
  data = Composite() ;
  dist = Composite() ;
  assign = Composite() ;
  for i = 1:numChunks
    chunk = i:numChunks:numData ;
    data{i} = X(:, chunk) ;
    dist{i} = inf(1, numel(chunk), class(X)) ;
    assign{i} = zeros(1, numel(chunk)) ;
  end
  else
  numChunks = 1 ;
  data = X ;
  dist = inf(1, numData, class(X)) ;
  assign = zeros(1, numData) ;
end 