valkremk at gmail.com
Sat Dec 3 16:40:48 CET 2016
I am trying to read and summarize a big data frame( >10M records)
Here is the sample of my data
I want get the total count by state, and the the number of cities
by state. The x variable is either 100 or 200 and count each
The result should look like as follows.
At the present I am doing it in several steps and taking too long
Is there an efficient way of doing this?
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