TIME-SERIES DATA PROCESSING METHOD, RECORDING MEDIUM HAVING RECORDED THEREON TIME-SERIES DATA PROCESSING PROGRAM, AND TIME-SERIES DATA PROCESSING DEVICE
A group generating section generates, from a plurality of pieces of time-series data, a plurality of groups each made up of a plurality of pieces of time-series data that change in a similar manner. A normalization section linearly transforms, for each group, data included in the time-series data in the group so that a maximum value and a minimum value of median values included in median-value time-series data are transformed to 1 and 0, respectively. An abnormality degree calculating section obtains, for each group, an average value of differences between pieces of data of the same time for every combination of two pieces of time-series data in the group, to take a maximum value of the obtained average values as an abnormality degree of the group. A ranking generating section generates a group ranking based on the abnormality degrees of the groups. The group rankings are displayed.
