| clkey | Pick the first items of the classes |
| -c <cldata> | classified data for defining classes |
| -d <srcdata> | source data frame |
| -dout <trgdata> | target data for keys of classes |
| [-ext <extension>] | extension for the name of the class variable |
| [-md <value>] | missing value to be skipped |
This command picks one value from each field of source data for each class in the specified classified data. The values are stored to the given data frame in which one data record will correspond to one class.