The Ageing is a number uniquely mapped to each equipment model name (meaning, each equipment model name will have a single unique Ageing number). The output data format looks like this: Now, the problem statement: I need to find two values: "net" and "gross" for each combination of ...
For categorical with unobserved results, the result is null. For categorical that is not in the table ("Dan"), it is not shown in the final results. You either do not show that day in your final results, or you report null for that day. 0 gives a different meaning here. ...