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- How does JMP perform Group X function in Graph Bui...

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Mar 8, 2016 11:38 AM
(1441 views)

I am curious how JMP organizes data with the Group X function. For this example:

- Temperature is X axis
- Y is Y axis
- Condition is used for overlay
- Measurement is used in Group X

Does JMP simply create groups based on the number of data points?

5 REPLIES

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Mar 8, 2016 12:06 PM
(1298 views)

because your X grouping column is continuous JMP divides the groupings into equal number groups. If the column was ordinal or nominal it would create a grouping for each value found for the column.

Jim

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Mar 9, 2016 4:33 AM
(1298 views)

If you don't like what JMP gives you by default, you can easily make changes. See 'Separate Variables into Groups' at:

http://www.jmp.com/support/help/Add_Variables.shtml#100031

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Mar 9, 2016 5:39 AM
(1298 views)

For a continuous column in either the Group X or Group Y role, JMP uses quantiles to divide the data into 5 groups.

As Ian@JMP points out, you can right click on the grouping variable label and select Number of Levels to change how many groups are created (still based on quantiles).

-Jeff

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Mar 9, 2016 5:55 AM
(1298 views)

Does it use quantiles to divide the data or simply put equal amounts of data into each group?

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Mar 9, 2016 6:02 AM
(1298 views)