Original link: http://tecdat.cn/?p=7002
The measurement signal can be displayed without the inherent overall pattern data. These trends can sometimes interfere with data analysis, it must be removed.
Consider (ECG) ECG signals having two different trends. ECG signals susceptible to interference, such as interference power and the like. Load signal and draw them.
A first signal on a linear trend display of FIG. The trend of the second signal is non-linear. To eliminate linear trend.
dt_ecgl = detrend（ecgl）;
To eliminate non-linear trend, set the low-order polynomial fit to the signal and subtract it. In this case, the sixth-order polynomial. Draw two new signals.
The trend has been effectively eliminated. Observe how the baseline shift signal is no longer displayed.
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Big Data tribe - Chinese professional third-party data service providers to provide customized one-stop data mining and statistical analysis consultancy services
Statistical analysis and data mining consulting services: y0.cn/teradat (Consulting Services, please contact the official website customer service )
QQ：3025393450
QQ exchange group: 186 388 004
[Service] Scene
Research; the company outsourcing; online and offline one training; data reptile collection; academic research; report writing; market research.
[Tribe] big data to provide customized one-stop data mining and statistical analysis consultancy
Welcome to elective our R language data analysis will be mining will know the course!