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Number the rows based on number of new categories

NMuralidharan62

As shown in below table I have Lot ID from A to E, there are multiple rows for the same lot. I want to create a column that counts as shown in the Lot number column below. I am new JMP user, please help me,

Accepted answers

Dan_Obermiller

And if you like the look of the formula editor, you could see it this way:

All comments

txnelson

There are several previous entries covering this, but since it is such a simple formula here it is

If( Row() == 1, count = 1 );
If( :Lot != Lag( :lot ),
	count
	++);
count;

Dan_Obermiller

And if you like the look of the formula editor, you could see it this way:

NMuralidharan62

Hi Dan

Thank you very much, It perfectly works.

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