Bug in single_burst_ratio, first 2 spikes are ignored

[anilbey]

eFEL/efel/cppcore/LibV1.cpp

Line 1070 in 49a3bab

for (size_t i = 1; i < isivalues.size(); i++) {

Here in this loop

  double average = 0.;
  for (size_t i = 1; i < isivalues.size(); i++) {
    average += isivalues[i];
  }

The loop here is ignoring the first ISI. The function returning the ISIs however is LibV1::ISI_values and that is already ignoring the first ISI.

eFEL/efel/cppcore/LibV1.cpp

Line 86 in 49a3bab

const auto& intFeatures = getFeatures(IntFeatureData, {"ignore_first_ISI"});

As a result first 2 ISIs are removed from the computation.