To make easily performable the comparison, analysis, etc., of plural objects showing the power distributions.
The comparison objects A, B and C have the sets of events and the quantities FA, FB and FC corresponding to the elements ti of the sets of events and also the distributions of power having the same sequencing based on the value of the said quantities. Under such conditions, the weighting is carried out according to the sequencing difference of power distributions and also to the ranks of sequence to calculate a 1st distance and then a 2nd distance concerning a scale is calculated from the quantitative difference of power distributions, and the 1st and 2nd distances are added together through the weighting that increases the 1st distance. Thus, the distance is calculated between the power distributions and the power distributions are compared with each other in terms of quantity according to the distance calculated between the power distributions. As a result, the comparison of objects is facilitated as long as the comparison objects shows the same power distributions even when the characteristics of these objects are not known.
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