I have an Nx2 matrix where N=size of the time series where the values in column one are GMT unix epoch microseconds and the second column are data values such as voltage from an ECG sensor
Time (microseconds) Data (mv)
1) 1.58187589357166e+15 0.0149830624856947
2) 1.58187589357565e+15 0.0226207624424608
3) 1.58187589357965e+15 0.0127982248671193
4) 1.58187589358365e+15 0.00203405305053278
Is there a way I can segment the data (column 2) based on start and stop time values?
Say I want a numeric matrix of the data between 2) 1.58187589357565e+15 and 4) 1.58187589358365e+15, how would I create that (without necissarily knowing the indices since these are really large time series and it is difficult to manually search for the corresponding time values)?
I would use the sampling frequency to manually segment the data but I just learned from the manufacturer that this is not an accurate technique for my data