Missing datapoints in exported CSV's #125
Thanks for a great program.
I am recording (demo) data from a Philips Intellivue MP50. Seemingly works fine, but when I Export to CSV, with epoch equal to the highest sample rate, the data is not equally spaced.
There does not seem to be any pattern. Later in the file, it looks like this:
vitaldb2017 (2019-07-12 01:57)
In the attached figure, the data point interval is 0.002 seconds and 30 data points are 0.06 seconds.
For ABP, there are 8 values in 30 data points (0.06 seconds) and 19 values in ECG.
The output resolution of the two waves is roughly calculated as follows:
ABP: 8/0.06 =133 Hz
ECG: 19/0.06 = 316 Hz
Therefore, if you want to represent both data at regular intervals in one sheet, you will need to output the least common multiple of the time interval frequency of the two variables.
Of course, the empty cells that occur need imputation separately.
The ECG is recorded at 500 Hz. Later in the same file, it looks like this:
Anyway, we are going to do some more research on the Philips monitor communication so that we can fix the bug.