Passing column name as argument to a function - is concatenating with : needed?

[#1]

Below is a function where I am trying to pass a column name for plotting a distribution, but it is not working. I am wondering what is the correct syntax?

Names Default To Here (1);
getDistChart = Function({ColName}, {dC},

dC = Distribution( Continuous Distribution( Column( :ColName) ) );

return(dC);
);
//gt = getDistChart ("MyCol"); to test the function

I have already got the data table with MyCol as a column name open. I am wondering if I need to concatenate

:

 with the column name

ColName

If so how (as normal concatenation with || || does not seem to be working)?

[#2]

Names Default To Here( 1 );

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

getDistChart = Function( {ColName}, {dC}, 
	dC = Distribution( Continuous Distribution( Column( As Column( colName ) ) ) );
	Return( dC );
);

gt = getDistChart ("weight");

[#3]

@Mark_Bailey Thanks it works. However, I am getting stuck advancing to the next step. I would like to pass the column name to several places in my script. Using Big Class as an example below. I am able to pass the ColName to New Window but not to Dispatch 

Names Default To Here (1);

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

getDistChart = Function({ColName, _LSL, _USL}, {distChart},

New Window(""||ColName||" distribution",

Distribution(
	Stack( 1 ),
	Continuous Distribution(
		Column(As Column (ColName) ),
		Horizontal Layout( 1 ),
		Vertical( 0 ),
		Capability Analysis( LSL(_LSL ), USL(_USL) )
	),
	SendToReport(
		Dispatch(
			{"weight"},
			"Distrib Histogram",
			FrameBox,
			{DispatchSeg( LabelSeg( 1 ), {Font( "Segoe UI", 7, "Plain" )} ),
			DispatchSeg( LabelSeg( 2 ), {Font( "Segoe UI", 7, "Plain" )} )}
		)
	)
);
);

return(distChart);
);

getDistChart ("weight", 55, 185); 

For example this 

Dispatch(	{ColName},...

or this from here

Dispatch(	{Expr(ColName)},...

does not work. What is the correct syntax to pass a string as argument for Dispatch? 

[#4]

Names Default To Here( 1 );

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

getDistChart = Function( {ColName, _LSL, _USL},
	{distChart}, 

	New Window( "" || ColName || " distribution", 

		Distribution(
			Stack( 1 ),
			Continuous Distribution(
				Column( As Column( ColName ) ),
				Horizontal Layout( 1 ),
				Vertical( 0 ),
				Capability Analysis( LSL( _LSL ), USL( _USL ) )
			),
			SendToReport(
				Dispatch(
					{colName},
					"Distrib Histogram",
					FrameBox,
					{DispatchSeg( LabelSeg( 1 ), {Font( "Segoe UI", 7, "Plain" )} ),
					DispatchSeg( LabelSeg( 2 ), {Font( "Segoe UI", 7, "Plain" )} )}
				)
			)
		)
	);

	Return( distChart );
);

getDistChart( "weight", 55, 185 );

[#5]

@Mark_Bailey  Thanks. Running your script gives me the following in the log

Cannot find item "ColName" in outline context {ColName}

Does it work for you?

(I am on JMP 13)

[#6 · Accepted solution]

Yes, it works perfectly for me with JMP Pro 16.1.0. I do not have any earlier versions of JMP installed to test. Your version is about 5 years old. JSL is constantly evolving, so it is possible that my syntax does not work for an earlier version.

You might contact JMP Technical Support (support@jmp.com) for help.

You might also try using expressions to accomplish what you want. They work for any version of JMP, since version 4. See if this version works:

Names Default To Here( 1 );

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

getDistChart = Function( {ColName, _LSL, _USL}, {distChart},
	Eval(
		Substitute(
			Expr(
				distChart = New Window( "" || ColName || " distribution", 
					Distribution(
						Stack( 1 ),
						Continuous Distribution(
							Column( As Column( ColName ) ),
							Horizontal Layout( 1 ),
							Vertical( 0 ),
							Capability Analysis( LSL( _LSL ), USL( _USL ) )
						),
						SendToReport(
							Dispatch(
								{ ccc },
								"Distrib Histogram",
								FrameBox,
								{DispatchSeg( LabelSeg( 1 ), {Font( "Segoe UI", 7, "Plain" )} ),
								DispatchSeg( LabelSeg( 2 ), {Font( "Segoe UI", 7, "Plain" )} )}
							)
						)
					)
				);
			),
			Expr( ccc ), colName
		)
	);
	Return( distChart );
);

getDistChart( "weight", 55, 185 );

[#7]

Thanks @Mark_Bailey  This works.