topic Re: Identifying multiple Peaks in different batches in Discussions

Identifying multiple Peaks in different batches

VariancePanther — Tue, 04 Jun 2024 06:45:55 GMT

Hello everyone,

I have a data set similar to the one in the example below, but the length-time profiles are assigned to different batches indicated by an additional column with the batch nr.

Solved: find multiple peak values in a column - JMP User Community

Is there a way to adapt the peak detection column formula in the thread above to perform the peak identification for each batch?

Thanks in advance!

Re: Identifying multiple Peaks in different batches

jthi — Tue, 04 Jun 2024 07:38:23 GMT

Which JMP version are you using (JMP17/18? JMP Standard / JMP Pro?) as there might be jmp platforms to do this. Column formula could also be modified by adding additional check for the batch changes.

Re: Identifying multiple Peaks in different batches

jthi — Tue, 04 Jun 2024 07:53:18 GMT

This is one possible formula option (:B is group column)

New column("Peak", Numeric, Nominal, Formula(
	prev_val = Col Moving Average(:Length, 1, 1, 0, :B) * 2 - :Length;
	next_val = Col Moving Average(:Length, 1, 0, 1, :B) * 2 - :Length;
	
	:Length - prev_val > 0 & :Length - next_val > 0
));