I have 5 years of data for multiple variables (weekly data). My goal is to identify which ones have seasonality and which ones don't. I searched for a statistical test or something but couldn't find anything. How can you test for seasonality without plotting and at scale?
I need something returning TRUE and FALSE
Here is the data looks like:
This is the seasonality I need to identify:
If any variable showing a seasonality trend like this, I want to tag it as seasonal. Is there any test for this or which way is the best to detect it?