val colNames = data.schema.fieldNames
.filter(colName => colName.split("-")(0) == "20003" || colName == "eid")

var medData = data.select(colNames.map(c => col(c)): _*).rdd

cannot resolve '`20003-0.0`' given input columns:
[20003-0.0, 20003-0.1, 20003-0.2, 20003-0.3];;

var medData = data.select(colNames.map(c => col(s"`$c`")): _*).rdd