1. A method, comprising: receiving a data table comprising one or more data groups and two or more attribute groups; merging a first one of the two or more attribute groups and a second one of the two or more attribute groups to form a merged attribute group; splitting a given one of the one or more data groups into the given data group and a new data group; and assigning one or more data points to the new data group, the one or more data points being previously assigned to the given data group; wherein the method is performed by at least one processor device.