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3 votes
1 answer
78 views

I am trying to resample a pandas dataframe, and for some columns I would like to sum on. additionally, I want to get None/nan as result when there is no rows in a resampling period. For aggregation on ...
-1 votes
1 answer
55 views

I am currently working on a data analysis task in DolphinDB where I need to perform column-wise aggregation on array vectors that store level - 10 bid/ask data. Specifically, I have data for bid ...
1 vote
1 answer
107 views

I’m planning to use ClickHouse to calculate wallet balances based on transactions in my base table. However, there’s an issue: if something goes wrong and I end up inserting the same transactions into ...
0 votes
1 answer
142 views

I'm working with Google BigQuery and I have a table with two numeric columns: grade1 and grade2. I want to calculate the total sum of both columns combined (row-wise) and then find the average of ...
2 votes
1 answer
135 views

I have a huge dataframe with 3B rows. I'm running the PySpark code below with the Spark config. spark = SparkSession\ .builder\ .appName("App")\ .config("spark....
0 votes
0 answers
79 views

I have a PySpark dataframe that contains 100M rows. I'm trying to do a series of aggregations on multiple columns, after a groupby. df_agg = df.groupby("colA","colB","colC&...
5 votes
2 answers
175 views

I have a proprietary file format definition that contains a header format: class Header { public: uint32_t checksum; uint16_t impedance; uint16_t type_of_data; uint32_t ...
1 vote
1 answer
140 views

In Vega or Vega lite, I want to create a stacked area chart where I can change the field used to color the visualization. Here is an example visualization. In this example, I would like to be able ...
2 votes
1 answer
83 views

I would like to run groupby and aggregation over a dataframe where the aggregation joins strings with the same id. The df looks like this: In [1]: df = pd.DataFrame.from_dict({'id':[1,1,2,2,2,3], '...
2 votes
2 answers
152 views

I have modeled the relationship between LeaseAgreement and Person as an aggregation. The '1' on the Person side is meant to indicate that each LeaseAgreement has exactly one reference to a Person (in ...
0 votes
2 answers
125 views

I'm using StringAgg and order as follows: # Get order column & annotate with list of credits if request.POST.get('order[0][name]'): order = request.POST['order[0][name]'] ...
0 votes
0 answers
54 views

I want to aggregate the values of my DataStream in tumbling windows of 10 seconds. Unfortunately is the documentation in Bytewax very limited and I also don't find any other source where an average of ...
0 votes
0 answers
73 views

We have a query calculating number of terms on multiple fields. { "query": { "bool": { "filter": [ { "term": { "...
4 votes
2 answers
242 views

I have a class Car, an enum Position, and a class Wheel. In Car, I have a map attribute: private Map<Position, Wheel> wheels; I want to represent this structure in a UML class diagram. My ...
0 votes
1 answer
108 views

Given data and mask tensors are there a pytorch-way to obtain masked aggregations of data (mean, max, min, etc.)? x = torch.tensor([ [1, 2, -1, -1], [10, 20, 30, -1] ]) mask = torch.tensor([ ...

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