topic Re: lag function in Discussions

lag function

ParametricStudy — Thu, 20 Jul 2023 18:15:23 GMT

Hello

having issue implementing formula/script using lag function that will help populate a new column where original column has some missing data. so if rows 1-5 have x value and missing readings from 6-10 and a change in row 11 so rows 6-10 would be that x val

Re: lag function

txnelson — Thu, 20 Jul 2023 18:36:52 GMT

If I am correctly interpreting what you want, Given a data table

The following formula will fill in the values in a new column as I believe you want them

If( Is Missing( :X ),
	Lag( :Y ),
	:X
)

Re: lag function

ParametricStudy — Thu, 20 Jul 2023 18:40:48 GMT

Yes!

Re: lag function

jthi — Thu, 20 Jul 2023 18:41:35 GMT

Besides using Lag() if your data is fairly simple and you want to only fill missing values by repeating earlier value, JMP does provide interactive option "Replace Missing with Previous Value"