JSL script for Inverse prediction of one single value

[#1]

I commonly use JSL to inverse predict a whole column of values, however I now need to inverse predict one single value from multiple curves in order to calculate an endpoint titer where the curve crosses a predefined threshold. The script I normally use is below, how can I modify it to inverse predict one value? Is the best way to make a new column with one value or to have a place in the code to put the value?

fc=Data Table( "Ab" ) << Fit Curve(
	Y( :Ave OD ),
	X( :"Log10[Dilution]" ),
Fit Logistic 4P(Save Inverse Prediction Formula),
	By( :Sample)
	
);

Thanks!

[#2]

One way would be to just send a value to the Profiler, then read the prediction. Here's an example:

Names Default To Here (1);
dt = open ("$SAMPLE_DATA/Big Class.jmp");
fc = Fit Curve(
	Y( :weight ),
	X( :height ),
	Fit Logistic 4P(
		Profiler(
			1,
			Confidence Intervals( 1 ),
			Term Value( :height( 62.55, Lock( 0 ), Show( 1 ) ) )
		)
	),
	SendToReport(
		Dispatch( {"Logistic 4P"}, "Parameter Estimates", OutlineBox, {Close( 1 )} )
	)
);
//set the X axis to 65
Report(fc)["Logistic 4P","Prediction Profiler",NumberEditBox(1)] << set (65);
//read and display the prediction for Y
prediction = Report(fc)["Logistic 4P","Prediction Profiler",TextBox(10)] << get text;
show (num(prediction));

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