Create Column References

Tip: To see all the messages you can send to a column, go to Help > Scripting Index > Data Table > Column Scripting.

Creating a column reference enables you to access and send messages to the column. If you store each column reference in a JSL variable, you can use the variables instead of column names in the Y and X roles and elsewhere in the script.

For example, using Big Class.jmp, the following lines create Ycol as a column reference for weight, and Xcol as a column reference for height. The last line sends a message to Xcol to get the data type.

dt = Open( "$SAMPLE_DATA/Big Class.jmp" );

Ycol = Column( "weight" );

Xcol = Column( "height" );

Xcol << Get Data Type;

In the log, “Numeric” is output for the data type of the Xcol (height column).