topic Re: Reference lines won't show up on chart in Discussions

Reference lines won't show up on chart

jan_solo — Fri, 09 Jun 2023 22:06:43 GMT

Hi everyone,

I'm currently writing a script that, eventually, generates charts. On these charts, I add 6 reference lines. 2 of them just won't show:

vlbCharts << Append(
		
		Control Chart Builder(
			Size(800, 500), // Chart size
			Show Two Shewhart Charts(0),
			Show Control Panel(0),
			Show Excluded Region(0),
			Show Limit Summaries(0),
			Show Capability(0),
			Variables(Subgroup(:BatchPrefix), Y(:Value)),
			Chart(
				Points(Statistic("Individual")),
				Limits(Sigma("Moving Range" ), Show Limits(0))
			),
			SendToReport(
				Dispatch(
					{},
					"Control Chart Builder",
					OutlineBox,
					{Set Title(sProduct ||  ": " || sComponent)}
				), // Chart title
				Dispatch(
					{},
					"Value",
					ScaleBox,
					{Min(nMinValue), Max(nMaxValue), Inc(nTicks), Minor Ticks(0),
					Add Ref Line(nLSL, "Solid", "Medium Light Orange", "LSL", 1), // Not shown
					Add Ref Line(nUSL, "Solid", "Medium Light Orange", "USL", 1), // Not shown
					Add Ref Line(nLCL, "Solid", "Medium Dark Red", "LCL", 1),
					Add Ref Line(nUCL, "Solid", "Medium Dark Red", "UCL", 1),
					Add Ref Line(nLCL_Calc, "Solid", "Dark Blue", "LCL_Calc", 1),
					Add Ref Line(nUCL_Calc, "Solid", "Dark Blue", "UCL_Calc", 1)}
				),
				Dispatch(
					{},
					"graph display 1 title",
					TextEditBox,
					{Set Text("")}),
				Dispatch(
					{},
					"Control Chart Builder",
					FrameBox,
					{DispatchSeg(Line Seg(1), {Line Color("Black")} )}
				)
			)
		);
	);

The problem is the label "LSL" and "USL". When I change these to something else (eg "US" and "LS"), the lines will be displayed:

Add Ref Line(nLSL, "Solid", "Medium Light Orange", "LS", 1), // shows on chart

Add Ref Line(nUSL, "Solid", "Medium Light Orange", "US", 1), // shows on chart

Is there any way I can actually use LSL and USL as labels?

Thanks,

Jan

Re: Reference lines won't show up on chart

pauldeen — Tue, 23 Feb 2021 13:01:51 GMT

This seems to be a bug in the control chart builder platform as it works manually but not in code. I can reproduce the issue on JMP 16 EA8 and have submitted a bug report.

Re: Reference lines won't show up on chart

gzmorgan0 — Tue, 23 Feb 2021 13:07:31 GMT

@jan_solo

This is just a wild guess knowing how JMP labels reference lines. Specify your reference lines with names USL and LSL and add the message to your control chart object.

cc_obj << Show Spec Limits(1);

If that doesn't work, an alternative is shown in the JMP > Help > Scripting Index

Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA/Reliability/GaAs Laser.jmp" );
obj = dt << Degradation(
	Y( :Current ),
	Time( :Hours ),
	Label( :Unit ),
	Set Upper Spec Limit( 7.5 )  //set the spec limits
);
obj << Show Spec Limits( 1 );

My fingers are crossed.

Re: Reference lines won't show up on chart

tonya_mauldin — Tue, 23 Feb 2021 13:14:27 GMT

@gzmorgan0 is correct. You need to add the following command to your CCB code.

Show Spec Limits( 1 );

USL and LSL are the names JMP uses when you have a spec limit column property. Some users have requested that spec limit column properties not show by default in control charts. This is how the platform turns those off and on. You are using the same names JMP uses so, you will therefore need to use the above command to see them.