Is there any way to filter duplicated values of a dimension using crossfilter?
For example I want to filter the duplicated records by the id dimension
id value
1 5
2 7
2 7
And I want to obtain
id value
1 5
2 7
It is important tonote that I dont want to group them by id I just want to filter out the duplicated records. Is this possible?
Thank a lot
Yes - you'd need to build a custom reducer and keep track of all the key values you've already seen in the group. It's important to keep a count of each of them. Reductio does this under the function called exception aggregation, but that name will likely change. If you want to do this yourself in your own custom reducer, the relevant implementation is in the value-count aggregation (which tracks the previously seen values) and the exception count (which does a count aggregation for unique records).
