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Replace missing values for weight with average/mean of other attribute (item identifyer)
I have a data set containing supermarket data and two of my attributes are item weight and item identifier.
A lot of examples are missing weight info, but because of the item identifier I know what they have to be (see image: DRA24 has to be 19.350 and DRA59 has to be 8.270)
How can I replace the missing values for weight based on the average or mean of the item identifier attribute?
Or is there another way how I can fix the missing values for weight?