Can JMP automatically dichotomize continuous variables while making contingency tables?

Question

This data table contains hypothetical values from a method comparison between two quantitative tests. You can see that I dichotomized the quantitative values in columns "Test A" and "Test B" at a setpoint of 4, resulting in columns "Test A dich4" and "Test B dich4", respectively. This facilitated fitting {y by x} of the resultant columns into a 2x2 contingency table (script “Split at 4”).

* Can JMP automatically calculate the typical characteristics from such an analysis? (e.g. overall percent agreement)
* Is there a way to get a 2x2 contingency table without manually performing dichotomization? e.g. I’d prefer to ask for a contingency table of the two columns containing continuous variables (herein "Test A" and "Test B") with automatic dichotomization at a point that I provide. This would facilitate quicker review of tables splitting the data at different levels relevant to a given measurement system, such as 1, 2, 3.5, 4, 4.5, etc.

Dichotomize-question.jmp

sunbears · Answer

I found percent agreement (completed with 95%CI) on my own. It’s under Variability / Attribute Gauge Chart. It took some careful review to figure out that the “Grouping” characteristic is fulfilled by Sample name for our design. Seems like this could be under the contingency section of the Fit Y by X analysis, but at least we’ve got the function somewhere.

brady_brady · Answer

The answer is "yes", but before you go that route, try this:

1) Implement the table variable and formulas as described above.

2) Run the analysis you want. In the ensuing report, click in the upper-left-most red triangle menu and select Redo > Automatic Recalc. By selecting this option, you are telling JMP to refresh the report whenever the data table changes.

3) Leaving the report open, update the table variable to various values. Since this changes the data table, it also updates the report... so you can run a single report and interact with it just by changing table variable(s).

4) If you like this approach, save the report's script to the data table using the red triangle menu, and you're done.

sunbears · Answer

Also, can JMP automatically calculate the typical inter-rater reliability characteristics from such an analysis? (e.g. overall percent agreement, percept positive agreement)