meta dirty_statistics dirty(computeStatistics) ;
when (changed(values)) { set dirty_statistics=1;}

meta computeStatistics statistics_spectral(values,J,K,M,JS) : hidden;

meta average vector(computeStatistics,0) : dump;
meta energyNorm vector(computeStatistics,1) : dump;
meta standardDeviation vector(computeStatistics,2) : dump;
meta isConstant vector(computeStatistics,3) : dump;

alias statistics.avg = average;
alias statistics.enorm = energyNorm;
alias statistics.sd = standardDeviation;
alias statistics.const = isConstant;