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Hi @elena2020chao,
Can you share your dataset(s) in order we can better understand.
Moreover can you, from your initial dataset(s), give an example of what you want to obtain ?
Regards,
Lionel
my proccess< content is:Read ExcelAppendWrite ExcelGenerate Attributes -->> if(cluster = "cluster1","yes",if(cluster = "cluster2","no","un"))
but no meage data and show erorr"exception evaluation" error on '='
please help me
You made a mistake in the syntax in the definition of your new attribute :
You have to define it like that :
if(cluster == "cluster1","yes",if(cluster == "cluster2","no","un"))