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Update heart rate boundaries in hrv.py #73

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Update heart rate boundaries in hrv.py #73

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12 changes: 8 additions & 4 deletions biosppy/signals/hrv.py
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Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,7 @@
'q_hist', 'fbands', 'frequencies', 'powers', 'freq_method']


def hrv(rpeaks=None, sampling_rate=1000., rri=None, parameters='auto',
def hrv(rpeaks=None, sampling_rate=1000., rri=None, rri_min=300, rri_max=1500, parameters='auto',
outliers='interpolate', detrend_rri=True, features_only=True,
show=True, show_individual=False, **kwargs):
"""Extracts the RR-interval sequence from a list of R-peak indexes and
Expand All @@ -54,6 +54,10 @@ def hrv(rpeaks=None, sampling_rate=1000., rri=None, parameters='auto',
rri : array, optional
RR-intervals (ms). Providing this parameter overrides the computation of
RR-intervals from rpeaks.
rri_min : int, optional
Minimum RR-interval (ms). Default: 300 ms.
rri_max : int, optional
Maximum RR-interval (ms). Default: 1500 ms.
parameters : str, optional
If 'auto' computes the recommended HRV features. If 'time' computes
only time-domain features. If 'frequency' computes only
Expand Down Expand Up @@ -109,7 +113,7 @@ def hrv(rpeaks=None, sampling_rate=1000., rri=None, parameters='auto',
if rri is None:
rpeaks = np.array(rpeaks, dtype=float)
rri = compute_rri(rpeaks=rpeaks, sampling_rate=sampling_rate,
filter_rri=False)
filter_rri=False, rri_min=rri_min, rri_max=rri_max)

# compute duration
duration = np.sum(rri) / 1000. # seconds
Expand Down Expand Up @@ -214,7 +218,7 @@ def hrv(rpeaks=None, sampling_rate=1000., rri=None, parameters='auto',
return out


def compute_rri(rpeaks, sampling_rate=1000., filter_rri=True, show=False):
def compute_rri(rpeaks, sampling_rate=1000., filter_rri=True, rri_min=300, rri_max=1500, show=False):
"""Computes RR intervals in milliseconds from a list of R-peak indexes.

Parameters
Expand Down Expand Up @@ -245,7 +249,7 @@ def compute_rri(rpeaks, sampling_rate=1000., filter_rri=True, show=False):
rri = rri_filter(rri)

# check if rri is within physiological parameters
if rri.min() < 400 or rri.max() > 1400:
if rri.min() < rri_min or rri.max() > rri_max:
warnings.warn("RR-intervals appear to be out of normal parameters."
"Check input values.")

Expand Down