arrays - Matrix to string in Matlab -

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I have a m6 matrix in matlab and I want to display it in a string without white space and semicolon. I used the mat2str function but output would be [1 2 3; 4 5 6; ...] Is there no work or effective way to do any string with spaces and semicolons?

Kind regards, 

  str = sprintf ('% d ', MTX);

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