How to manually add a multiple regression line to JMP Graph Builder

Question

I have made the following graph using JMP 13.1.0:

I want to manually add a line from my multiple regression model that looks like:

* Log(estimate) = intercept + Log(truth) + Domain + Log(truth)*Log(truth) + Log(truth)*Domain + Log(truth)*Log(truth)*Domain

Based on the graph above:

Variables(
		X( :Name( "Log(truth)" ) ),
		Y( :Name( "Log(estimate)" ) ),
		Overlay( :Domain )
	),

I have tried the following script:

Dispatch(
			{},
			"Graph Builder",
			FrameBox,
			{Add Graphics Script(
				2,
				Description( "Script" ),
				Pen Color( "green" );
				Pen Size( 3 );
				Y Function(-.333 - .31(Domain) + .236(x) - .029(x*x) + .107(Domain*x) + .330(Domain*x*x), x )

However, it is not working because I do not know how to refer to my "domain" variable, which is overlayed in the graph displayted above.

Thanks for any help,

Adrian

gzmorgan0 · Answer

Adrian,

I assume the Domain==1 for food and 0 for gadgets.  First  .31(Domain) woudl not work without a multiplication symbol (*).

I suggest the following: sepcify 2 lines, one when Domain==1 and another when Domain==0 or substitute the appropriate indicator values and use the mutiplication symbol.

Dispatch(
 {},
 "Graph Builder",
 FrameBox,
 {Add Graphics Script(
 2,
 Description( "Script" ),
 Pen Color( "green" );
 Pen Size( 3 );
 Y Function(-.333 - .31 + .236*x - .029*x*x + .107*x + .330*x*x, x );
 Y Function(-.333 + .236*x - .029*x*x , x );

Cool graph!