generate a new (complex) Attribute

SimonW18272

Hey everyone,

I want to get a new attribute which is quiet complicated (atleast I think its the case)

I got the follwoing table with the data set in black and I want to get a new variable which indicates if the last case (look at date) with the same ID was a yes or no.

Imagine the data would be if a person (ID) came to the doctors appionted was noted. Now I want to generate an attribute if the person (ID) came to the last  appointment (before this one)or not. How can I enable this in Rapidminer because its quiet complex for me. Hope you get my question with the example

MartinLiebig

Hi,

seems like you can first use lag and then something like:

if(date_before(Date-1,Date),"Yes,"No")

with generate attributes

or so?

Best,

Martin

BalazsBarany

Simple lag won't be enough if multiple patients are in the data. The right approach would be "Loop values" on the ID (or better a nominal copy of it for Loop Values), inside the loop filtering for the current ID, and doing the lag there. 

MartinLiebig

Oh, true.

I usually recommend to use Group Into Collection + Loop Collection over Loop Values for this though.

BR,

Martin