Update ecg.py

[ZHX2502]

Added Pan_Tompkins_Plus_Plus, an improved Pan-Tompkins algorithm

[sofia3ms]

Biosppy currently does not support data frames. Would it be possible to change this function to use only numpy?

[ZHX2502]

maybe convert dataframe to numpy array using pandas.DataFrame.to_numpy?

[sofia3ms]

For now we don't support pandas in biosppy, so anything that requires a pandas import will not work. Is it possible to estimate the threshold without any pandas function?

[ZHX2502]

This modification should work, i have tested and it worked:

def estimate_th(x, alpha, ww):
from scipy.ndimage import filters
x_abs = np.abs(x)
q1 = filters.percentile_filter(x_abs, 25, size=ww, mode='reflect')
q3 = filters.percentile_filter(x_abs, 75, size=ww, mode='reflect')
th = alpha * ((q3 - q1) / 2)
return th

[sofia3ms]

Hello Zihao, and thank you for your contribution! I suggested some changes that need to be addressed before testing the code with the rest of Biosppy. They are mainly related with imports and consistency with the rest of the library. Let me know if you agree with them!