How to report the maximum value of only previous rows in a group of rows in R?

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Peter Schneider
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How to report the maximum value of only previous rows in a group of rows in R?
I hope you found a solution that worked for you :)
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Thanks to all those great people for their contributions!

(stackoverflow.com/users/3829013/krisanathema)KrisAnathema
(stackoverflow.com/users/5614268/evan-friedland)Evan Friedland
(stackoverflow.com/collectives/r-language)
A special thanks goes out to the (stackoverflow.com/questions/79297960/how-to-report-the-maximum-value-of-only-previous-rows-in-a-group-of-rows-in-r)Stackexchange community

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