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How to replace the row's value by the original value minus the previous row's value?
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MartinLiebig
Administrator, Moderator, Employee-RapidMiner, RapidMiner Certified Analyst, RapidMiner Certified Expert, University Professor Posts: 3,533 
RM Data Scientist
Hi,use lag first and then you can use generate attributes to substract.Best,Martin- Sr. Director Data Solutions, Altair RapidMiner -
Dortmund, Germany5
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