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Results tagged with gathering
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user 13892
Questions on gathering, grouping or clustering data based on certain criteria. This is to be used with primary tags such as list-manipulation, string-manipulation or similar tags, with the primary tag indicating the specific use case.
9
votes
2
answers
261
views
How to do a Hierarchical GroupBy?
Consider a simple expr as an example:
expr = {
{a},{a,b},{a,c},{a,b,c,d},{a,b,c,f},
{b,c},{b,d}
};
I want to GroupBy as much as possible keeping the hierarchy of Keys intact then apply a fu …
- 9,751
7
votes
2
answers
157
views
Is there a way to `Merge` with different functions across Keys?
Many times when working with Dataset I have to GroupBy. If for example, I group by and aggregate on columns of the same type then the single aggregator function like the following is usually enough.
…
- 9,751