Hey Ali,
I think so too. I guess you included the folloinwg lines of code to define obs and model timetables before using synchronize command:
obs = readtimetable('Obs.xlsx');
model = readtimetable('Sim.xlsx');
'first' is computing the row time from the first input time table only. There are more options, you can check them in the following link to the documentation:
'linear' will do a linear interpolation of data values in the output timetable. For more interpolation methods, and some other methods (aggregation, fill, time step), please use th elink above.
