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Sep 8, 2017 9:00 AM
(478 views)

When the jmp file is opened it simulates the situation for individual values where we want to detect a mean shift of 3 wtih the number of subgroups k equal to 10 (n=1).

I have attached two picture files to give an idea of what I want to do. First is with detection rule one only. Second is with detection rules 1 and 2 in the list (Wheeler Rule '4' choice of 8 points either side of the central line).

Is it possible to export the x-axis and y-axis values that are behind these great charts for the "Mean Shift" graph. Obviously, they are in the background so how to access/read them?

By exporting values for different scenarios I coud graphically compare the power functions and false alarm risks given the different choice of detection rules. (Here the emphasis is having these different scenarios on the same graph.)

Can anybody help? How to export and access the computed values for the x-axis and y-axis behind the graphs? (Main request is for the "mean shift" chart.)

Thanks as always for any assistance! Hope my points are clear.

Scott.

3 REPLIES

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Oct 18, 2017 4:19 PM
(282 views)

Hi Scott

Here are two ways of getting the values from the axes:

```
pf=EMP Measurement Systems Analysis(
Y( :Values ),
X,
Part( :Column 1 ),
Model( "Crossed" ),
Dispersion Chart Type( "Range" ),
Parallelism Plots( 0 ),
EMP Results( 1 ),
Variance Components( 1 ),
EMP Gauge RR Results( 1 ),
Average Chart( 1 ),
Dispersion Chart( 1 ),
Shift Detection Profiler(
Profiler(
1,
Confidence Intervals( 1 ),
Term Value(
Number of Subgroups( "10", Lock( 0 ), Show( 1 ) ),
Part Mean Shift( 3, Lock( 0 ), Show( 1 ) ),
Part Std Dev( 1, Lock( 0 ), Show( 1 ) ),
Bias Factors Std Dev( 0, Max( 1 ), Lock( 0 ), Show( 1 ) ),
Name( "Test-Retest Std Dev" )(0.0000008619, Lock( 0 ), Show( 1 )),
Subgroup Size( "1", Lock( 0 ), Show( 1 ) )
),
Name( "Change In-Control Part Std Dev" )(1)
)
),
Max Iter( 100 ),
Conv Limit( 0.00000001 ),
SendToReport(
Dispatch(
{},
"Shift Detection Profiler",
OutlineBox,
{Set Summary Behavior( "Collapse" )}
),
Dispatch(
{"Shift Detection Profiler"},
"EMP Shift Detection Profiler",
FrameBox,
{Frame Size( 236, 214 )}
),
Dispatch(
{"Shift Detection Profiler"},
"EMP Shift Detection Profiler",
FrameBox( 3 ),
{Frame Size( 236, 214 )}
),
Dispatch(
{"Shift Detection Profiler"},
"EMP Shift Detection Profiler",
FrameBox( 5 ),
{Frame Size( 236, 214 )}
),
Dispatch(
{"Shift Detection Profiler"},
"EMP Shift Detection Profiler",
FrameBox( 7 ),
{Frame Size( 236, 214 )}
),
Dispatch(
{"Shift Detection Profiler"},
"EMP Shift Detection Profiler",
FrameBox( 9 ),
{Frame Size( 236, 214 )}
),
Dispatch(
{"Shift Detection Profiler"},
"EMP Shift Detection Profiler",
FrameBox( 11 ),
{Frame Size( 236, 214 )}
),
Dispatch(
{"Shift Detection Profiler"},
"Customize and Select Tests",
OutlineBox,
{Close( 0 )}
)
)
);
rep=pf<<report;
//Approach with xpath
ns=rep<<xpath("//OutlineBox[text()='Shift Detection Profiler']//AxisBox");
yPartMeanShiftMin=ns[1]<<get min;
yPartMeanShiftMax=ns[1]<<get max;
xPartMeanShiftMin=ns[4]<<get min;
xPartMeanShiftMax=ns[4]<<get max;
//2nd approach
yPartMeanShiftMin=rep(OutlineBox["Shift Detection Profiler"])[AxisBox(5)]<<get min;
yPartMeanShiftMax=rep(OutlineBox["Shift Detection Profiler"])[AxisBox(5)]<<get max;
xPartMeanShiftMin=rep(OutlineBox["Shift Detection Profiler"])[AxisBox(7)]<<get min;
yPartMeanShiftMax=rep(OutlineBox["Shift Detection Profiler"])[AxisBox(7)]<<get max;
```

KR, Thomas

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Oct 31, 2017 6:30 AM
(226 views)

Dear Thomas,

I have run the script a few times and while I always find the Measurement Systems Analysis output, including the Shift Detection Profiler output (the various graphs based on Number of Subgroups, Part Mean Shift...) I don't find, or know how to find, the actual values that are behind the graphs (meaning a series of x- and y-coordinates from which I could then create the same graphs outside of the Measurement Systems Analysis output forms).

If you could point out what I'm doing wrong, or not doing, please let me know. Would be much appreciated.

Regards, Scott.

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Nov 1, 2017 6:02 AM
(208 views)

Dear Scott

I guess, now I understand what you are looking for. In some platforms you can simply save the profiler formula or the data grid, but not in this platform. A way could possibly be to change each coordinate sequentially and record the probability of Warning value for each, but as there a 6 dimensions, a grid with just 10 values will give you 10^6 combinations, so it is a dull path to go, and there is no guarantee for a usable result. Probably finding out the math behind and doing the calculations would be more feasible. Hopefully somebody comes up with a better solution.

Kind regards, Thomas