dataset1 <- maml.mapInputPort(1)#class: data.frame
# Sample operation
cols <- c("age",
    "workclass",
    "fnlwgt",
    "education",
    "education-num",
    "marital-status",
    "occupation",
    "relationship",
    "race",
    "sex",
    "capital-gain",
    "capital-loss",
    "hours-per-week",
    "native-country",
    "income")
 colnames(data.frame) <- cols
 data.set = dataset1;
 maml.mapOutputPort("data.set");