SS3D | Space Station 3D , another remake | Game Engine library
kandi X-RAY | SS3D Summary
kandi X-RAY | SS3D Summary
RE:SS3D the game, another remake of SS13, but with an extra D.
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QUESTION
I have a dataframe with user and session columns, I want to randomly sample the number of sessions so that the dataframe contains N unique sessions per user. The ordering of sessions is important i.e. the 'in' column per session must be preserved.
For example if N=2
and I have:
ANSWER
Answered 2018-Jun-19 at 13:51Use groupby
+ transform
to define a mask of your original dataframe, and then subset the original df
by that mask.
I used list(set(x))
to guarantee that the same session_id
is not picked twice (along with replace=False
). This assumes you want each session_id
to have an equal probability of showing up, regardless of how many times it appeared in the original df
.
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