how to combine time series in matlab

Question

Daniel Barzegar 2014-6-17

0
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https://ww2.mathworks.cn/matlabcentral/answers/134883-how-to-combine-time-series-in-matlab

回答： Pritesh Shah 2014-6-17

I have two time series objects:

Accelerometer, with 591755 samples in the form:

Time X Y Z 1 (space)181135620117(space) 0.21547815 (space)9.740809(space) 0.11133038

2 (space)181140258789(space) -0.027533319(space) 10.150218(space) 0.08738836

3(space) 181145629882(space) -0.22984336(space) 10.376471(space) 0.16519992

...

and, Gyroscope, with the same amount of samples:

Time X Y Z 1 181135620117(space)-0.08841695(space) -0.023435818(space) -0.15233281

2 181140258789(space) -0.09161274(space) -0.027696876(space) -0.15126754

3 181145629882(space) -0.07456851(space) -0.024501082 (space)-0.13209279

...

the time is in nanoseconds. I want to produce a matrix with columns like this:

time X_acc Y_acc Z_acc X_gyro Y_gyro Z_gyro

1 (space) 0

2 (space) 0.005(sec)

3 (space) 0.010

...

I am brand new in Matlab, and I am really struggling with that one. I was told that I can use the resample() function from the timeseries class using 'zoh' interpolation method, but I cannot figure out how to do it.

Also, the input data are a .txt files, the first column is the sample number, the second is the time in nanoseconds, which doesnt start from 0( i want to make it to start from 0 ), and the 3 last columns are coordinates in X, Y, Z axis. The time variable is in nanoseconds, but i want to convert it to be in seconds and also interpolate at 0.005 intervals.. thanks