Calculating hourly average over several days using retime

Question

Nao 2022-11-12

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https://ww2.mathworks.cn/matlabcentral/answers/1849318-calculating-hourly-average-over-several-days-using-retime

回答： Image Analyst 2022-11-12

Hello.

I have a temperature data over the course of 2 weeks, at a sampling rate of 1 sec. I want to calculate the hourly average so that I can see a tendency in temperature change within the day.

I have tried this so far:

TT = array2timetable(TempC,"RowTimes",T);
Hour = retime(TT,"hourly","mean");

but this gives me the outcome of average temperature of the hour of one day, such as:

'2022/06/18 11:00:00' 32.2

'2022/06/18 12:00:00' 31.7

'2022/06/18 13:00:00' 30.8

'2022/06/18 14:00:00' 31.4

My ideal outcome is hourly average of 2 weeks combined. For example, I want the calculations to take average of the temperature at 12pm on June 18, 19, 20,..., so that the final result will show something like 12pm 30℃, 1pm 32℃,...

How should I do this? Thank you in advance!