'I want to do locf imputation grouping by date and with the condition of a specific time interval
I have data over time referred to intervals of 15 minutes but which are not regular.I would like to make a locf imputation by putting in place of each NA the first value available on that day but only if it falls within the immediately preceding hour.
I have this type of data: enter image description here
and I want to have this result: enter image description here
My code is: enter image description here
but I don't know how to have the condition of imputation in the interval of an hour. Can you help me?
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