I tried to obtain properties from scipy.signal.find_peaks, but it returns an empty dictionary {}. Can anyone help to fix it?
line={'x':[3405.024, 3405.312, 3406.176, 3406.464, 3406.752, 3407.04, 3407.328, 3408.192, 3408.48, 3408.768, 3409.056, 3409.344, 3410.208, 3410.496, 3410.784, 3411.072, 3411.36, 3412.224, 3412.512, 3412.8, 3413.088, 3413.376, 3414.24, 3414.528, 3414.816, 3415.104, 3415.392, 3416.256, 3416.544, 3416.832, 3417.12, 3417.408, 3418.272, 3418.56, 3418.848, 3419.136, 3419.424, 3420.288, 3420.576, 3420.864, 3421.152, 3421.44, 3422.304, 3422.592, 3422.88, 3423.168, 3423.456, 3424.32, 3424.608, 3424.896, 3425.184, 3425.472, 3426.336, 3426.624, 3426.912, 3427.2, 3427.488, 3428.352, 3428.64, 3428.928, 3429.216, 3429.504, 3430.368, 3430.656, 3430.944, 3431.232, 3431.52, 3432.384, 3432.672, 3432.96, 3433.248, 3433.536, 3434.4, 3434.688, 3434.976, 3435.264, 3435.552, 3436.416, 3436.704, 3436.992, 3437.28, 3437.568, 3438.432, 3438.72, 3439.008, 3439.296, 3439.584, 3440.448, 3440.736, 3441.024, 3441.312, 3441.6, 3442.464, 3442.752, 3443.04, 3443.328, 3443.616, 3446.784, 3447.072, 3447.36, 3447.648, 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2.9161729891245227, 2.911935999891451, 2.896417726428179, 2.898940273843373, 2.8951579879203897, 2.886189355260204, 2.9091151063692093, 2.8992706703011177, 2.895453863515079, 2.8788995783497784, 2.8789845854022316, 2.89047933320601, 2.8979224192980593, 2.8881360937889298, 2.896751710195652, 2.8790824784924367, 2.8969734235605875, 2.898082683905878, 2.909342251831121, 2.9070673254146855, 2.8872077101208267, 2.891123474503871, 2.888572314334519, 2.8817986291265023, 2.8753337226251725, 2.8737598581078565, 2.8783575789921154, 2.867808253209416, 2.8497945212357005, 2.8392950365274237, 2.8153576260700426, 2.8185456929134998, 2.8253019924080207, 2.8288712405608827, 2.8221710322062323, 2.8100183794152946, 2.7681498575125953, 2.742390211943808, 2.792849100488907, 2.790026871755891, 2.792735260255324, 2.7746751189360492, 2.7928607427598386, 2.778956818305892, 2.774587510597919, 2.7629222212014386, 2.7385934473474234, 2.745969768703785, 2.7503317074577964, 2.7649130418783114, 2.767732897488769, 2.772028865305056, 2.7619817721377706, 2.7706064899620073, 2.7763126454998215, 2.786212313698737, 2.802673026727067, 2.78340104867985, 2.758183878749916, 2.743656235653572, 2.7701133956928436, 2.760025238913161, 2.7642904134655, 2.7599647903480373, 2.768544885546413, 2.7913152045520464, 2.7854886131704686, 2.7812735815987657, 2.7320161850757247, 2.7231157434265394, 2.6751482107427886, 2.681411567472767, 2.637660451225097, 2.6278522128296027, 2.596465035825378, 2.6169615566163595, 2.5683539101775836, 2.5225643565877998, 2.5427818533230595, 2.5698387209196802, 2.5203688447388806, 2.5314195096680696, 2.5623730621802134, 2.5853420641486036, 2.540136269265092, 2.565455618183025, 2.575464093057478, 2.578758890008093, 2.6105825154513993, 2.5903245474265875, 2.5696223783321663, 2.557233685735461, 2.5978400470167387, 2.611454530182371, 2.606400722406021, 2.6182183639355108, 2.606302545314764, 2.6113411921707956, 2.614691105551711, 2.6279869932301434, 2.619688293530369, 2.6263497361070973, 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from scipy.signal import find_peaks
max_index, properties = find_peaks(line['y'],prominence=None)
max_x = [line['x'][i] for i in max_index]
max_y = [line['y'][i] for i in max_index]
peak = {'x':max_x,'y':max_y}
print(properties)
>Solution :
The problem is that you are passing None to prominence. None is already the default value, and is used to signal that no value for the argument was given.
Pass a numeric value as below:
max_index, properties = find_peaks(line['y'], prominence=0.1)
max_x = [line['x'][i] for i in max_index]
max_y = [line['y'][i] for i in max_index]
peak = {'x': max_x, 'y': max_y}
print(properties)
Output
{'prominences': array([0.27416504, 0.10761815]), 'left_bases': array([ 14, 132]), 'right_bases': array([158, 158])}