what is etalon metric used for which of the following is a natural metric what is metric optimization? which are natural metrics which metric would be the best for an estimate of an object's distance? which metrics are natural is etalon an approximation which metrics can you use to improve your metric is metric optimization better? metric optimization which is the best approximation of a natural metric? what is the metric for etalon metric which metric best describes the discrete learning sample what's the new metric what would make the best linear combination what is the metric for the optimization of a metric is it possible to use an etalon metric for an object what is the best metric to use for estimating distance how to find metric of accuracy can you do metric optimization on discrete learning?