Calculate the mean of the values in each time serie

Hello, i have a data of time series. I want to get these data on regular time intervals (each 15 min). How I can achieve this task under matlab?

Answer 1

[Walter Roberson]

If you have a new enough version of MATLAB, you can use a timetable() and use retime()

[amine&&]

Hi Roberson, yes i have matlab 2016, but i only know how to make this manipulation every minute. Not every 15 minutes.

[Walter Roberson]

retime() needs R2016b or later. If you have that, then you can provide a duration vector as the second argument to retime(); see https://www.mathworks.com/help/matlab/ref/retime.html#input_argument_d0e871321

[Walter Roberson]

Your image appears to be using timetable objects; your original question asked about time series. If you do have timeseries objects, you can use the resample() method.

[amine&&]

Thanks Roberson for your help. In fact the command that i needed was

resample(timeSeries.Variables,1,15);

since i had the data every 15 minutes.

Answer 2

[Image Analyst]

Use interp1() to resample the data at the desired interval.

[amine&&]

Hey Image Analyst, I want to use mean of each time intervals.

[Image Analyst]

OK. But It's hard for anyone to give you specific recommendations or code when you don't even show us what form your data is in. So why don't you just resample all your vectors so that they cover the same time intervals, add them up, and divide by the number of vectors. Will that not work?

[amine&&]

Hi Image Analyst. this is not complicate enough as you say. But the function interp1 () does not work for my series that you find enclosed a screenshot.