Method, device and computer program for ascertaining an anomaly

A non-transitory machine-readable memory element on is stored a computer program for ascertaining whether a series of sensor values contains an anomaly, the computer program, when executed by a computer, causing the computer to perform:

• providing a shapelet and at least one training data series;
• measuring in each case a distance between the shapelet and the training data series at a plurality of different predefined positions of the training data series;
• ascertaining at least one minimal distance from the measured distances;
• and
• ascertaining at least one change variable for at least one predefinable data point of the shapelet, the change variable being ascertained as a function of at least one of the measured distances.

A device for ascertaining whether a series of sensor values contains an anomaly, the device configured to:

• provide a shapelet and at least one training data series;
• measure in each case a distance between the shapelet and the training data series at a plurality of different predefined positions of the training data series;
• ascertain at least one minimal distance from the measured distances;
• and
• ascertain at least one change variable for at least one predefinable data point of the shapelet, the change variable being ascertained as a function of at least one of the measured distances.