topic Re: Droite de référence particulière sur un histogramme in Discussions

Droite de référence particulière sur un histogramme

rugolf — Thu, 06 Aug 2026 15:09:37 GMT

Bonjour,

Comment ajouter une ligne de référence (celle de la moyenne) sur l'histogramme de la plateforme distribution lorsque l'on a un sélecteur de colonnes, je souhaite avoir cette ligne pour chacune des 10 variables, évidemment sans avoir à la rajouter à la main ?

Par avance merci.

Jean-Luc

Re: Droite de référence particulière sur un histogramme

jthi — Thu, 06 Aug 2026 17:59:21 GMT

You have few options:

Set Target of specification limit column property as the mean and enable those in plots. You will need to calculate these beforehand and set them to column properties but summary + manage spec limits should be able to do this
JSL: use Column Switch Handler which updates the reference lines as column changes
JSL: Create graphic script which is able to update the reference line
Use different platform such as Graph Builder in which you can easily add the line as separate element

Re: Droite de référence particulière sur un histogramme

jthi — Thu, 06 Aug 2026 18:11:00 GMT

Below are some examples for the JSL options (there are plenty of different ways of doing these):

Example for the graphic script option:

Names Default To Here(1); 

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

dist = dt << Distribution(
	Continuous Distribution(
		Column(:height),
		Always use column properties(1),
		Process Capability(0)
	),
	Column Switcher(:height, {:height, :weight})
);


Report(dist)[FrameBox(1)] << Add Graphics Script(Function({this},
	m = ((this << Top Parent)[OutlineBox("Summary Statistics"), Number Col Box(1)] << get)[1];
	Pen Color("Purple");
	Pen Size(5);
	H Line(m);
));

Example for the column switch handler:

Names Default To Here(1); 

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

dist = dt << Distribution(
	Continuous Distribution(
		Column(:height),
		Always use column properties(1),
		Process Capability(0)
	)
);

cw = dist << Column Switcher(:height, {:height, :weight});
post = Function({previousColumn, currentColumn, switcher},
	prevm = Col Mean(previousColumn);
	m = Col Mean(currentColumn);
	axisbox = Report(dist)[axis box(1)];
	Try(axisbox << Remove Ref Line(prevm));
	axisbox << Add Ref Line(m, "Dashed", blue, "Mean", 2);
	wait(0);
);
handler = cw << Make Column Switch Handler(Empty(), post);