Is this what you are talking about. This script creates 2 new columns, each with a different formula:
Names Default To Here( 1 );
dt =
// Open Data Table: Big Class.jmp
// → Data Table( "Big Class" )
Open( "$SAMPLE_DATA/Big Class.jmp" );
dt << New Column( "one", formula( :height + :weight ) );
dt << New Column( "two", formula( :height / :weight ) );
txnelson_0-1687816089277.png
Jim