Reference a scale box with a variable

[#1]

Hi,

I'm trying to produce multiple graphs with a for loop, and assign the column title to the Y axis.

After graphing, I want to add three reference lines to the Y axis with a Dispatch command, but cannot figure out how to dynamically reference the Y axis box, see *** below:

For( i = 12, i <= 18, i++,
	Col_name = Column( i ) << Get Name;
	temp = Expr( Col_name );
//Graph Line Data
	Split_dt << Graph Builder(
		Size( 536, 500 ),
		Variables( X( :Year ), X( :Month, Position( 1 ) ), X( :Day, Position( 1 ) ), Y( Column( i ) ) ),
		Elements(
			Box Plot( X( 1 ), X( 2 ), Y, Legend( 9 ), Jitter( 1 ), Outliers( 1 ), Box Style( "Outlier" ) )
		),
		SendToReport(
			Dispatch(
				{},
				,
				ScaleBox,
				{Add Ref Line( 9, Solid, "Black", "LSL" ), Add Ref Line( 21, Solid, "Black", "USL" ),
				Add Ref Line( 16, Dashed, "Medium Dark Green", "Target" )}
			)
		),
		SendToReport(
			Dispatch(
				{},
				"graph title",
				TextEditBox,
				{Set Text( "Line " || Char( Line_Number ) || " " || Col_name )}
			)
		)
	);
);

This code returns the error "Cannot find ScaleBox[ "Col_name" ] at {}", as if JSL is evaluating Col_name as a string.

Any ideas on for to make Col_name evaluate to it's value, or add the ref lines differently?

Thanks!

[#2]

Forgot to add the ***, see below:

For( i = 12, i <= 18, i++,
	Col_name = Column( i ) << Get Name;
	temp = Expr( Col_name );
//Graph Line Data
	Split_dt << Graph Builder(
		Size( 536, 500 ),
		Variables( X( :Year ), X( :Month, Position( 1 ) ), X( :Day, Position( 1 ) ), Y( Column( i ) ) ),
		Elements(
			Box Plot( X( 1 ), X( 2 ), And, Legend( 9 ), Jitter( 1 ), Outliers( 1 ), Box Style( "Outlier" ) )
		),
		SendToReport(
			Dispatch(
				{}, 
    
   				ScaleBox,
				{Add Ref Line( 9, Solid, "Black", "LSL" ), Add Ref Line( 21, Solid, "Black", "USL" ),
				Add Ref Line( 16, Dashed, "Medium Dark Green", "Target" )}
			)
		),
		SendToReport(
			Dispatch(
				{},
				"graph title",
				TextEditBox,
				{Set Text( "Line " || Char( Line_Number ) || " " || Col_name )}
			)
		)
	);
);

[#3]

I've discovered a work-around by setting spec limits for the columns I want to graph and setting show as reference lines:

I still don't know of any way to make the Dispatch function evaluate the variable.  It just takes it as a string.

[#4]

Here's one way to add reference lines to an axis via JSL:

Names Default To Here( 1 );
// Make some data and make a graph
dt = New Table( "Test", New Column( "Y", Numeric, Continuous, Formula( Random Normal() ) ), AddRows( 20 ) );
gb = dt << Graph Builder(
	Size( 528, 420 ),
	Show Control Panel( 0 ),
	Variables( Y( :Y ) ),
	Elements( Points( Y, Legend( 16 ) ) ),

);
// Template expression to add a reference line
addRefLine = Expr(
	gb << SendToReport( Dispatch( {}, "Y", ScaleBox, {Add Ref Line( TBD, "Solid", "Black", "", 1 )} ) )
);
// Loop . . .
For( i = -3, i <= 3, i++,
	Wait( 1 );
	Eval( Substitute( Name Expr( addRefLine ), Expr( TBD ), i ) );
);