PRWAITBARONCE

Generate single prwaitbar message

   PRWAITBARONCE(STRING,PAR)

Input
STRING	String with text to be written in the waitbar,  e.g. '%i x %i eigenvalue decomposition: '.  This will be parsed by S = SPRINTF(STRING,PAR{:});
PAR	scalar or cell array with parameter values

  This routine has to be used in combination with PRWAITBAR(0), e.g.

    prwaitbaronce('%i x %i eigenvalue decomposition ... ',{n,n})
    [Q,L] = eig(H);
    prwaitbar(0)

It makes clear to the user what is happening.