missing the first 'SCR_Onsets' in some EDAsignals

[RaoulL1]

Hello,

I am using the nk.eda_process() function with a series "EDA_15" of 30000 values, recorded at 2000HZ (so 15sec).

My code is like that :
SR=2000
eda_si_15, info_15 = nk.eda_process(EDA_15, sampling_rate=SR)

I dont know why but for some of my samples, there is a mistake when I try to plot it via
nk.eda_plot(eda_si_15)

The mistake is always of the same format :
"Length of values (n-1) does not match length of index (n)"

I realized it is because the first 'SCR_Onsets' is missing.

So I manage to plot with manually adding a first SCR_Onsets if missing with the following code :
peak_index = eda_si_15.index[eda_si_15['SCR_Peaks'] == 1][0]
onset_index = eda_si_15.index[eda_si_15['SCR_Onsets'] == 1][0]
if peak_index < onset_index:
eda_si_15.loc[0, 'SCR_Onsets'] = 1

But I still dont understand why I sometime have this mistake and sometime no.

Thank you very much for your help.