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Aug 31, 2009 9:31 AM
(1350 views)

How can I use the row subscript function to get the maximum value from another column for all rows preceding the current row?

Here is what I would like to do:

(current row value)/(Max row value from only the rows above current row)

Here is what I would like to do:

(current row value)/(Max row value from only the rows above current row)

2 REPLIES

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Sep 2, 2009 9:10 AM
(1262 views)

The most straightforward way to do this is with two columns, each with it's own formula:

Use the Big Class.jmp sample data table and create two columns with the following formulas to see what I mean.

Max height so far = If(Row() == 1, :height, Maximum(:height, :Max Height so far[Row() - 1]))

Proportion of max height so far = :height / :Max Height so far

I'm still working to see if I can do it in a single column.

Jeff

Use the Big Class.jmp sample data table and create two columns with the following formulas to see what I mean.

Max height so far = If(Row() == 1, :height, Maximum(:height, :Max Height so far[Row() - 1]))

Proportion of max height so far = :height / :Max Height so far

I'm still working to see if I can do it in a single column.

Jeff

-Jeff

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Sep 10, 2009 12:57 PM
(1262 views)

Thanks, that works.

Seems like I had a similar formula that worked using a single column a few versions ago?

Seems like I had a similar formula that worked using a single column a few versions ago?