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After executing b in feature engineering:
a = 10 observations
b= 1559 observations
combi = 14204 obs
After executing parameters of c
a = 10 observations
b= 1559 observations
c= 14204 obs
combi = 14204 obs

Right after executing full_join for variable c
image

After executing c i.e. Outlet_Establishment_Year, my observations increase multi-fold. I have tried most of the ways I could understand. Please help.

Also, please help me with the use and relevance of %>%.

Thank you!

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