计算 Python 中一维数组中最大点之后每个（右点和左点）的距离
Calculate distance of each (right and left point) after maximum point in 1D-array in Python
我需要帮助，我有一个数组 fft_line_log，谁给我一个图形曲线，我想找到这个数组中最大点之后每个点之间的距离。
import numpy as np
import matplotlib.pyplot as plt
fft_line_log = np.array([ 6.69444503, 6.62028965, 6.71395111, 6.70660448, 6.70821623,
6.66914818, 6.7160331 , 6.68638117, 6.75695725, 6.68171623,
6.73955838, 6.68919801, 6.76332219, 6.78286017, 6.81555002,
6.75381555, 6.75353165, 6.70909775, 6.74073086, 6.70899932,
6.6908525 , 6.59418955, 6.65966783, 6.65627975, 6.75186109,
6.71053962, 6.77552219, 6.78359504, 6.81006956, 6.76919262,
6.74450256, 6.74058832, 6.69536545, 6.6519225 , 6.62621774,
6.62584858, 6.67337241, 6.6917687 , 6.75191211, 6.75534094,
6.72788613, 6.68803099, 6.6613495 , 6.71848276, 6.75129579,
6.76199942, 6.73916056, 6.73957135, 6.76513941, 6.72795522,
6.63711679, 6.55248903, 6.61974385, 6.74794642, 6.88099129,
6.81151706, 6.7377934 , 6.65227642, 6.65518817, 6.6474948 ,
6.67242465, 6.69769372, 6.77683837, 6.71750359, 6.70146931,
6.69701514, 6.77291463, 6.81000081, 6.73833814, 6.54288474,
6.64435143, 6.65653662, 6.87412486, 6.77087266, 6.92963172,
6.859477 , 6.92261811, 6.90716066, 6.95589443, 6.97304283,
6.97534776, 6.92405218, 6.8408661 , 6.83609476, 7.00246089,
7.05132823, 6.9246729 , 6.77486571, 6.8026577 , 6.91282969,
6.93526752, 6.96253309, 6.98858486, 6.85929044, 6.84243664,
6.77238593, 6.95158598, 6.91181849, 7.05094391, 6.97864081,
7.00878382, 6.82880079, 6.87036188, 6.90655258, 6.93307678,
6.94892631, 6.97922417, 7.0470304 , 7.15139031, 7.15694858,
7.1192599 , 7.05265314, 7.07909791, 7.1168476 , 7.12643587,
7.15610456, 7.19698636, 7.09834314, 7.05124444, 7.06147316,
7.29265349, 7.38762255, 7.19255318, 7.0914197 , 6.99632408,
7.28783749, 7.40642556, 7.50042657, 7.52199961, 7.38090861,
7.31366312, 7.32918037, 7.41356871, 7.40686241, 7.34454923,
7.35754063, 7.36483637, 7.52229303, 7.45715298, 7.54329464,
7.35501191, 7.41806418, 7.37864369, 7.3268464 , 7.20434605,
6.99586801, 6.93583466, 7.11969473, 7.15938148, 7.44589042,
7.34313421, 7.30155559, 7.28786179, 7.36995234, 7.3420818 ,
7.17021967, 7.27735024, 7.37770573, 7.41216788, 7.32619126,
7.48962489, 7.34112295, 7.35875597, 7.0881354 , 7.46850535,
7.47971955, 7.75637784, 7.64789912, 7.60647042, 7.65423208,
7.75347939, 7.87979044, 7.68933715, 7.70211081, 7.51374563,
7.57404798, 7.58926237, 7.84621756, 7.99034484, 8.04283399,
7.97958613, 7.93807446, 7.98169401, 7.8776668 , 7.73453558,
7.74164658, 7.97903408, 8.10268243, 8.03542065, 8.10972688,
8.04294297, 8.05633646, 8.03725912, 8.25983391, 8.38995519,
8.36962264, 8.17699733, 8.21024941, 8.39719101, 8.62435624,
8.66466254, 8.53202815, 8.59849915, 8.55345886, 8.7359906 ,
8.61148309, 8.66471803, 8.58964817, 8.37817649, 8.4487452 ,
8.29727521, 8.80497468, 9.13774425, 9.23056669, 9.05938092,
8.92915832, 8.95605045, 9.19371233, 9.21134305, 9.32966008,
9.44885488, 9.60703095, 9.68599202, 9.73857392, 9.58981375,
9.69326948, 9.69908055, 9.61247299, 9.59321922, 9.72546618,
9.82947886, 9.88234468, 9.80105886, 9.90076688, 9.88697706,
9.93188788, 10.07941562, 10.1883549 , 10.26928882, 10.24549213,
10.38841197, 10.56229069, 10.73973299, 10.68900618, 10.56318566,
10.8720509 , 11.10384486, 11.21957039, 11.08780539, 11.1755498 ,
11.29213701, 11.66953016, 11.85629452, 12.08136708, 12.31552502,
12.54267264, 12.7436129 , 12.70261375, 12.63184165, 12.3234958 ,
12.10415375, 11.75131106, 11.67532432, 11.51112149, 11.43912942,
11.27077754, 11.12796411, 10.98608465, 10.95421553, 10.81817012,
10.60892879, 10.34879649, 10.24336291, 10.18332674, 10.26584287,
10.34229355, 10.35252445, 10.21730733, 10.10098059, 10.03168354,
9.95282456, 9.79382044, 9.71416103, 9.59824455, 9.62126605,
9.41602153, 9.43508821, 9.30142416, 9.37191569, 9.36895303,
9.52453799, 9.32715386, 9.1983345 , 9.06336403, 9.19879466,
9.06028903, 8.93720321, 8.91570714, 8.91893331, 8.9922376 ,
9.01113625, 9.14272431, 9.09864042, 9.00019683, 8.70994841,
8.65760632, 8.71252674, 8.83044602, 8.7077489 , 8.44856982,
8.36202746, 8.49380112, 8.43758768, 8.51522822, 8.39732377,
8.38316112, 8.16890344, 8.13487416, 8.10955735, 8.09696699,
8.02992363, 8.17105347, 8.18225026, 8.13724563, 8.0722829 ,
8.25107359, 8.17611697, 8.04802661, 7.80321978, 7.88329972,
7.93738869, 7.90669758, 8.01759731, 8.04220377, 7.90675838,
7.70493407, 7.53787673, 7.62073091, 7.52546029, 7.70095934,
7.84623128, 8.0006942 , 7.89516578, 7.74835171, 7.64721769,
7.53282095, 7.64161662, 7.55674742, 7.62838586, 7.48794439,
7.42979731, 7.47872707, 7.48249818, 7.45731704, 7.27393537,
7.44293302, 7.50772531, 7.60515245, 7.43210472, 7.44673673,
7.45097998, 7.47935287, 7.35754501, 7.15439062, 7.13837326,
7.2174589 , 7.25192887, 7.18308351, 7.09712443, 7.15393078,
7.11611744, 6.98504757, 6.96222427, 7.23452273, 7.38547407,
7.4523931 , 7.44356096, 7.42744486, 7.40436835, 7.23342905,
7.09705073, 7.12021193, 7.24969532, 7.23342225, 7.22111859,
7.11009096, 7.23244932, 7.05444443, 7.11840265, 7.23738078,
7.238834 , 7.13244689, 7.02936601, 7.07470322, 7.18216904,
7.06915501, 7.10676358, 6.99505972, 7.03908845, 7.19477338,
7.28860964, 7.23505325, 7.09765474, 7.04976001, 7.04160299,
7.04334479, 7.1015781 , 7.18696615, 7.09222292, 6.97253299,
6.93880034, 7.03973312, 7.11494813, 7.03234211, 6.98742809,
6.77929055, 6.84197639, 6.95866474, 6.98850632, 6.99234258,
6.80117981, 6.79377084, 6.67441952, 6.71621183, 6.6648103 ,
6.75270579, 6.73731868, 6.86448484, 6.82328277, 6.74100421,
6.73419727, 6.71847507, 6.87672801, 6.92205112, 7.02398639,
6.9724521 , 6.86443623, 6.76949467, 6.68317052, 6.67938603,
6.64126311, 6.71279214, 6.77487357, 6.82779673, 6.71670699,
6.61091739, 6.59593221, 6.69074946, 6.81515364, 6.76440899,
6.78353573, 6.72608694, 6.7629007 , 6.74374407, 6.71517095,
6.67005636, 6.67293791, 6.72497808, 6.76154375, 6.74949199,
6.70005328, 6.72457262, 6.76483267, 6.78789715, 6.78164388,
6.7401589 , 6.78448831, 6.77338756, 6.80087043, 6.75914855,
6.73225717, 6.70224985, 6.70150418, 6.66315441, 6.67396018,
6.6377038 , 6.69045353, 6.68431725, 6.76329228, 6.7355242 ,
6.70520747, 6.61466211, 6.61972572, 6.64595276, 6.69601337,
6.70481754, 6.69784698, 6.63233624, 6.64712029, 6.76416368,
6.73909511, 6.71532065, 6.5486919 , 6.58517468, 6.61351347,
6.63310043, 6.62013832, 6.62029447, 6.61951258, 6.6607056 ,
6.6548232 , 6.6497125 , 6.69929709, 6.68842114, 6.74815417,
6.73749318, 6.75484044, 6.71556177, 6.56280052, 6.48748225,
6.49914832, 6.5760775 ])
pt_max=np.max(fft_line_log)
ecart=np.array([])
for step in np.arange(pt_max,pt_max-4,-0.1):
print("step= "+str(step))
e=np.where((fft_line_log<step)&(fft_line_log>step-0.1))
ecart=np.append(ecart,e[0][-1]-e[0][0])
plt.figure(33)
plt.plot(ecart,'*-')
预览：
]
这应该可以解决问题：
import numpy as np
import matplotlib.pyplot as plt
array = np.array([ 6.69444503, 6.62028965, 6.71395111, 6.70660448, 6.70821623, 6.66914818, 6.7160331 , 6.68638117, 6.75695725, 6.68171623, 6.73955838, 6.68919801, 6.76332219, 6.78286017, 6.81555002, 6.75381555, 6.75353165, 6.70909775, 6.74073086, 6.70899932, 6.6908525 , 6.59418955, 6.65966783, 6.65627975, 6.75186109, 6.71053962, 6.77552219, 6.78359504, 6.81006956, 6.76919262, 6.74450256, 6.74058832, 6.69536545, 6.6519225 , 6.62621774, 6.62584858, 6.67337241, 6.6917687 , 6.75191211, 6.75534094, 6.72788613, 6.68803099, 6.6613495 , 6.71848276, 6.75129579, 6.76199942, 6.73916056, 6.73957135, 6.76513941, 6.72795522, 6.63711679, 6.55248903, 6.61974385, 6.74794642, 6.88099129, 6.81151706, 6.7377934 , 6.65227642, 6.65518817, 6.6474948 , 6.67242465, 6.69769372, 6.77683837, 6.71750359, 6.70146931, 6.69701514, 6.77291463, 6.81000081, 6.73833814, 6.54288474, 6.64435143, 6.65653662, 6.87412486, 6.77087266, 6.92963172, 6.859477 , 6.92261811, 6.90716066, 6.95589443, 6.97304283, 6.97534776, 6.92405218, 6.8408661 , 6.83609476, 7.00246089, 7.05132823, 6.9246729 , 6.77486571, 6.8026577 , 6.91282969, 6.93526752, 6.96253309, 6.98858486, 6.85929044, 6.84243664, 6.77238593, 6.95158598, 6.91181849, 7.05094391, 6.97864081, 7.00878382, 6.82880079, 6.87036188, 6.90655258, 6.93307678, 6.94892631, 6.97922417, 7.0470304 , 7.15139031, 7.15694858, 7.1192599 , 7.05265314, 7.07909791, 7.1168476 , 7.12643587, 7.15610456, 7.19698636, 7.09834314, 7.05124444, 7.06147316, 7.29265349, 7.38762255, 7.19255318, 7.0914197 , 6.99632408, 7.28783749, 7.40642556, 7.50042657, 7.52199961, 7.38090861, 7.31366312, 7.32918037, 7.41356871, 7.40686241, 7.34454923, 7.35754063, 7.36483637, 7.52229303, 7.45715298, 7.54329464, 7.35501191, 7.41806418, 7.37864369, 7.3268464 , 7.20434605, 6.99586801, 6.93583466, 7.11969473, 7.15938148, 7.44589042, 7.34313421, 7.30155559, 7.28786179, 7.36995234, 7.3420818 , 7.17021967, 7.27735024, 7.37770573, 7.41216788, 7.32619126, 7.48962489, 7.34112295, 7.35875597, 7.0881354 , 7.46850535, 7.47971955, 7.75637784, 7.64789912, 7.60647042, 7.65423208, 7.75347939, 7.87979044, 7.68933715, 7.70211081, 7.51374563, 7.57404798, 7.58926237, 7.84621756, 7.99034484, 8.04283399, 7.97958613, 7.93807446, 7.98169401, 7.8776668 , 7.73453558, 7.74164658, 7.97903408, 8.10268243, 8.03542065, 8.10972688, 8.04294297, 8.05633646, 8.03725912, 8.25983391, 8.38995519, 8.36962264, 8.17699733, 8.21024941, 8.39719101, 8.62435624, 8.66466254, 8.53202815, 8.59849915, 8.55345886, 8.7359906 , 8.61148309, 8.66471803, 8.58964817, 8.37817649, 8.4487452 , 8.29727521, 8.80497468, 9.13774425, 9.23056669, 9.05938092, 8.92915832, 8.95605045, 9.19371233, 9.21134305, 9.32966008, 9.44885488, 9.60703095, 9.68599202, 9.73857392, 9.58981375, 9.69326948, 9.69908055, 9.61247299, 9.59321922, 9.72546618, 9.82947886, 9.88234468, 9.80105886, 9.90076688, 9.88697706, 9.93188788, 10.07941562, 10.1883549 , 10.26928882, 10.24549213, 10.38841197, 10.56229069, 10.73973299, 10.68900618, 10.56318566, 10.8720509 , 11.10384486, 11.21957039, 11.08780539, 11.1755498 , 11.29213701, 11.66953016, 11.85629452, 12.08136708, 12.31552502, 12.54267264, 12.7436129 , 12.70261375, 12.63184165, 12.3234958 , 12.10415375, 11.75131106, 11.67532432, 11.51112149, 11.43912942, 11.27077754, 11.12796411, 10.98608465, 10.95421553, 10.81817012, 10.60892879, 10.34879649, 10.24336291, 10.18332674, 10.26584287, 10.34229355, 10.35252445, 10.21730733, 10.10098059, 10.03168354, 9.95282456, 9.79382044, 9.71416103, 9.59824455, 9.62126605, 9.41602153, 9.43508821, 9.30142416, 9.37191569, 9.36895303, 9.52453799, 9.32715386, 9.1983345 , 9.06336403, 9.19879466, 9.06028903, 8.93720321, 8.91570714, 8.91893331, 8.9922376 , 9.01113625, 9.14272431, 9.09864042, 9.00019683, 8.70994841, 8.65760632, 8.71252674, 8.83044602, 8.7077489 , 8.44856982, 8.36202746, 8.49380112, 8.43758768, 8.51522822, 8.39732377, 8.38316112, 8.16890344, 8.13487416, 8.10955735, 8.09696699, 8.02992363, 8.17105347, 8.18225026, 8.13724563, 8.0722829 , 8.25107359, 8.17611697, 8.04802661, 7.80321978, 7.88329972, 7.93738869, 7.90669758, 8.01759731, 8.04220377, 7.90675838, 7.70493407, 7.53787673, 7.62073091, 7.52546029, 7.70095934, 7.84623128, 8.0006942 , 7.89516578, 7.74835171, 7.64721769, 7.53282095, 7.64161662, 7.55674742, 7.62838586, 7.48794439, 7.42979731, 7.47872707, 7.48249818, 7.45731704, 7.27393537, 7.44293302, 7.50772531, 7.60515245, 7.43210472, 7.44673673, 7.45097998, 7.47935287, 7.35754501, 7.15439062, 7.13837326, 7.2174589 , 7.25192887, 7.18308351, 7.09712443, 7.15393078, 7.11611744, 6.98504757, 6.96222427, 7.23452273, 7.38547407, 7.4523931 , 7.44356096, 7.42744486, 7.40436835, 7.23342905, 7.09705073, 7.12021193, 7.24969532, 7.23342225, 7.22111859, 7.11009096, 7.23244932, 7.05444443, 7.11840265, 7.23738078, 7.238834 , 7.13244689, 7.02936601, 7.07470322, 7.18216904, 7.06915501, 7.10676358, 6.99505972, 7.03908845, 7.19477338, 7.28860964, 7.23505325, 7.09765474, 7.04976001, 7.04160299, 7.04334479, 7.1015781 , 7.18696615, 7.09222292, 6.97253299, 6.93880034, 7.03973312, 7.11494813, 7.03234211, 6.98742809, 6.77929055, 6.84197639, 6.95866474, 6.98850632, 6.99234258, 6.80117981, 6.79377084, 6.67441952, 6.71621183, 6.6648103 , 6.75270579, 6.73731868, 6.86448484, 6.82328277, 6.74100421, 6.73419727, 6.71847507, 6.87672801, 6.92205112, 7.02398639, 6.9724521 , 6.86443623, 6.76949467, 6.68317052, 6.67938603, 6.64126311, 6.71279214, 6.77487357, 6.82779673, 6.71670699, 6.61091739, 6.59593221, 6.69074946, 6.81515364, 6.76440899, 6.78353573, 6.72608694, 6.7629007 , 6.74374407, 6.71517095, 6.67005636, 6.67293791, 6.72497808, 6.76154375, 6.74949199, 6.70005328, 6.72457262, 6.76483267, 6.78789715, 6.78164388, 6.7401589 , 6.78448831, 6.77338756, 6.80087043, 6.75914855, 6.73225717, 6.70224985, 6.70150418, 6.66315441, 6.67396018, 6.6377038 , 6.69045353, 6.68431725, 6.76329228, 6.7355242 , 6.70520747, 6.61466211, 6.61972572, 6.64595276, 6.69601337, 6.70481754, 6.69784698, 6.63233624, 6.64712029, 6.76416368, 6.73909511, 6.71532065, 6.5486919 , 6.58517468, 6.61351347, 6.63310043, 6.62013832, 6.62029447, 6.61951258, 6.6607056 , 6.6548232 , 6.6497125 , 6.69929709, 6.68842114, 6.74815417, 6.73749318, 6.75484044, 6.71556177, 6.56280052, 6.48748225, 6.49914832, 6.5760775 ])
ptMax = np.argmax(array), np.max(array)
nbPairs = min(ptMax[0], len(array) - ptMax[0])
for i in range(1, nbPairs):
xDist = 2*i
yDist = array[ptMax[0]+i] - array[ptMax[0]-i]
# print(xDist, yDist)
plt.plot([ptMax[0] - i, ptMax[0] - i + xDist], [array[ptMax[0]-i], array[ptMax[0]-i] + yDist], color="black")
plt.plot(array, '+', markersize=6)
plt.plot(ptMax[0], ptMax[1], 'ro')
plt.show()
您只需要注意点在数组中的顺序是否正确。
结果：
我需要帮助，我有一个数组 fft_line_log，谁给我一个图形曲线，我想找到这个数组中最大点之后每个点之间的距离。
import numpy as np
import matplotlib.pyplot as plt
fft_line_log = np.array([ 6.69444503, 6.62028965, 6.71395111, 6.70660448, 6.70821623,
6.66914818, 6.7160331 , 6.68638117, 6.75695725, 6.68171623,
6.73955838, 6.68919801, 6.76332219, 6.78286017, 6.81555002,
6.75381555, 6.75353165, 6.70909775, 6.74073086, 6.70899932,
6.6908525 , 6.59418955, 6.65966783, 6.65627975, 6.75186109,
6.71053962, 6.77552219, 6.78359504, 6.81006956, 6.76919262,
6.74450256, 6.74058832, 6.69536545, 6.6519225 , 6.62621774,
6.62584858, 6.67337241, 6.6917687 , 6.75191211, 6.75534094,
6.72788613, 6.68803099, 6.6613495 , 6.71848276, 6.75129579,
6.76199942, 6.73916056, 6.73957135, 6.76513941, 6.72795522,
6.63711679, 6.55248903, 6.61974385, 6.74794642, 6.88099129,
6.81151706, 6.7377934 , 6.65227642, 6.65518817, 6.6474948 ,
6.67242465, 6.69769372, 6.77683837, 6.71750359, 6.70146931,
6.69701514, 6.77291463, 6.81000081, 6.73833814, 6.54288474,
6.64435143, 6.65653662, 6.87412486, 6.77087266, 6.92963172,
6.859477 , 6.92261811, 6.90716066, 6.95589443, 6.97304283,
6.97534776, 6.92405218, 6.8408661 , 6.83609476, 7.00246089,
7.05132823, 6.9246729 , 6.77486571, 6.8026577 , 6.91282969,
6.93526752, 6.96253309, 6.98858486, 6.85929044, 6.84243664,
6.77238593, 6.95158598, 6.91181849, 7.05094391, 6.97864081,
7.00878382, 6.82880079, 6.87036188, 6.90655258, 6.93307678,
6.94892631, 6.97922417, 7.0470304 , 7.15139031, 7.15694858,
7.1192599 , 7.05265314, 7.07909791, 7.1168476 , 7.12643587,
7.15610456, 7.19698636, 7.09834314, 7.05124444, 7.06147316,
7.29265349, 7.38762255, 7.19255318, 7.0914197 , 6.99632408,
7.28783749, 7.40642556, 7.50042657, 7.52199961, 7.38090861,
7.31366312, 7.32918037, 7.41356871, 7.40686241, 7.34454923,
7.35754063, 7.36483637, 7.52229303, 7.45715298, 7.54329464,
7.35501191, 7.41806418, 7.37864369, 7.3268464 , 7.20434605,
6.99586801, 6.93583466, 7.11969473, 7.15938148, 7.44589042,
7.34313421, 7.30155559, 7.28786179, 7.36995234, 7.3420818 ,
7.17021967, 7.27735024, 7.37770573, 7.41216788, 7.32619126,
7.48962489, 7.34112295, 7.35875597, 7.0881354 , 7.46850535,
7.47971955, 7.75637784, 7.64789912, 7.60647042, 7.65423208,
7.75347939, 7.87979044, 7.68933715, 7.70211081, 7.51374563,
7.57404798, 7.58926237, 7.84621756, 7.99034484, 8.04283399,
7.97958613, 7.93807446, 7.98169401, 7.8776668 , 7.73453558,
7.74164658, 7.97903408, 8.10268243, 8.03542065, 8.10972688,
8.04294297, 8.05633646, 8.03725912, 8.25983391, 8.38995519,
8.36962264, 8.17699733, 8.21024941, 8.39719101, 8.62435624,
8.66466254, 8.53202815, 8.59849915, 8.55345886, 8.7359906 ,
8.61148309, 8.66471803, 8.58964817, 8.37817649, 8.4487452 ,
8.29727521, 8.80497468, 9.13774425, 9.23056669, 9.05938092,
8.92915832, 8.95605045, 9.19371233, 9.21134305, 9.32966008,
9.44885488, 9.60703095, 9.68599202, 9.73857392, 9.58981375,
9.69326948, 9.69908055, 9.61247299, 9.59321922, 9.72546618,
9.82947886, 9.88234468, 9.80105886, 9.90076688, 9.88697706,
9.93188788, 10.07941562, 10.1883549 , 10.26928882, 10.24549213,
10.38841197, 10.56229069, 10.73973299, 10.68900618, 10.56318566,
10.8720509 , 11.10384486, 11.21957039, 11.08780539, 11.1755498 ,
11.29213701, 11.66953016, 11.85629452, 12.08136708, 12.31552502,
12.54267264, 12.7436129 , 12.70261375, 12.63184165, 12.3234958 ,
12.10415375, 11.75131106, 11.67532432, 11.51112149, 11.43912942,
11.27077754, 11.12796411, 10.98608465, 10.95421553, 10.81817012,
10.60892879, 10.34879649, 10.24336291, 10.18332674, 10.26584287,
10.34229355, 10.35252445, 10.21730733, 10.10098059, 10.03168354,
9.95282456, 9.79382044, 9.71416103, 9.59824455, 9.62126605,
9.41602153, 9.43508821, 9.30142416, 9.37191569, 9.36895303,
9.52453799, 9.32715386, 9.1983345 , 9.06336403, 9.19879466,
9.06028903, 8.93720321, 8.91570714, 8.91893331, 8.9922376 ,
9.01113625, 9.14272431, 9.09864042, 9.00019683, 8.70994841,
8.65760632, 8.71252674, 8.83044602, 8.7077489 , 8.44856982,
8.36202746, 8.49380112, 8.43758768, 8.51522822, 8.39732377,
8.38316112, 8.16890344, 8.13487416, 8.10955735, 8.09696699,
8.02992363, 8.17105347, 8.18225026, 8.13724563, 8.0722829 ,
8.25107359, 8.17611697, 8.04802661, 7.80321978, 7.88329972,
7.93738869, 7.90669758, 8.01759731, 8.04220377, 7.90675838,
7.70493407, 7.53787673, 7.62073091, 7.52546029, 7.70095934,
7.84623128, 8.0006942 , 7.89516578, 7.74835171, 7.64721769,
7.53282095, 7.64161662, 7.55674742, 7.62838586, 7.48794439,
7.42979731, 7.47872707, 7.48249818, 7.45731704, 7.27393537,
7.44293302, 7.50772531, 7.60515245, 7.43210472, 7.44673673,
7.45097998, 7.47935287, 7.35754501, 7.15439062, 7.13837326,
7.2174589 , 7.25192887, 7.18308351, 7.09712443, 7.15393078,
7.11611744, 6.98504757, 6.96222427, 7.23452273, 7.38547407,
7.4523931 , 7.44356096, 7.42744486, 7.40436835, 7.23342905,
7.09705073, 7.12021193, 7.24969532, 7.23342225, 7.22111859,
7.11009096, 7.23244932, 7.05444443, 7.11840265, 7.23738078,
7.238834 , 7.13244689, 7.02936601, 7.07470322, 7.18216904,
7.06915501, 7.10676358, 6.99505972, 7.03908845, 7.19477338,
7.28860964, 7.23505325, 7.09765474, 7.04976001, 7.04160299,
7.04334479, 7.1015781 , 7.18696615, 7.09222292, 6.97253299,
6.93880034, 7.03973312, 7.11494813, 7.03234211, 6.98742809,
6.77929055, 6.84197639, 6.95866474, 6.98850632, 6.99234258,
6.80117981, 6.79377084, 6.67441952, 6.71621183, 6.6648103 ,
6.75270579, 6.73731868, 6.86448484, 6.82328277, 6.74100421,
6.73419727, 6.71847507, 6.87672801, 6.92205112, 7.02398639,
6.9724521 , 6.86443623, 6.76949467, 6.68317052, 6.67938603,
6.64126311, 6.71279214, 6.77487357, 6.82779673, 6.71670699,
6.61091739, 6.59593221, 6.69074946, 6.81515364, 6.76440899,
6.78353573, 6.72608694, 6.7629007 , 6.74374407, 6.71517095,
6.67005636, 6.67293791, 6.72497808, 6.76154375, 6.74949199,
6.70005328, 6.72457262, 6.76483267, 6.78789715, 6.78164388,
6.7401589 , 6.78448831, 6.77338756, 6.80087043, 6.75914855,
6.73225717, 6.70224985, 6.70150418, 6.66315441, 6.67396018,
6.6377038 , 6.69045353, 6.68431725, 6.76329228, 6.7355242 ,
6.70520747, 6.61466211, 6.61972572, 6.64595276, 6.69601337,
6.70481754, 6.69784698, 6.63233624, 6.64712029, 6.76416368,
6.73909511, 6.71532065, 6.5486919 , 6.58517468, 6.61351347,
6.63310043, 6.62013832, 6.62029447, 6.61951258, 6.6607056 ,
6.6548232 , 6.6497125 , 6.69929709, 6.68842114, 6.74815417,
6.73749318, 6.75484044, 6.71556177, 6.56280052, 6.48748225,
6.49914832, 6.5760775 ])
pt_max=np.max(fft_line_log)
ecart=np.array([])
for step in np.arange(pt_max,pt_max-4,-0.1):
print("step= "+str(step))
e=np.where((fft_line_log<step)&(fft_line_log>step-0.1))
ecart=np.append(ecart,e[0][-1]-e[0][0])
plt.figure(33)
plt.plot(ecart,'*-')
预览：
这应该可以解决问题：
import numpy as np
import matplotlib.pyplot as plt
array = np.array([ 6.69444503, 6.62028965, 6.71395111, 6.70660448, 6.70821623, 6.66914818, 6.7160331 , 6.68638117, 6.75695725, 6.68171623, 6.73955838, 6.68919801, 6.76332219, 6.78286017, 6.81555002, 6.75381555, 6.75353165, 6.70909775, 6.74073086, 6.70899932, 6.6908525 , 6.59418955, 6.65966783, 6.65627975, 6.75186109, 6.71053962, 6.77552219, 6.78359504, 6.81006956, 6.76919262, 6.74450256, 6.74058832, 6.69536545, 6.6519225 , 6.62621774, 6.62584858, 6.67337241, 6.6917687 , 6.75191211, 6.75534094, 6.72788613, 6.68803099, 6.6613495 , 6.71848276, 6.75129579, 6.76199942, 6.73916056, 6.73957135, 6.76513941, 6.72795522, 6.63711679, 6.55248903, 6.61974385, 6.74794642, 6.88099129, 6.81151706, 6.7377934 , 6.65227642, 6.65518817, 6.6474948 , 6.67242465, 6.69769372, 6.77683837, 6.71750359, 6.70146931, 6.69701514, 6.77291463, 6.81000081, 6.73833814, 6.54288474, 6.64435143, 6.65653662, 6.87412486, 6.77087266, 6.92963172, 6.859477 , 6.92261811, 6.90716066, 6.95589443, 6.97304283, 6.97534776, 6.92405218, 6.8408661 , 6.83609476, 7.00246089, 7.05132823, 6.9246729 , 6.77486571, 6.8026577 , 6.91282969, 6.93526752, 6.96253309, 6.98858486, 6.85929044, 6.84243664, 6.77238593, 6.95158598, 6.91181849, 7.05094391, 6.97864081, 7.00878382, 6.82880079, 6.87036188, 6.90655258, 6.93307678, 6.94892631, 6.97922417, 7.0470304 , 7.15139031, 7.15694858, 7.1192599 , 7.05265314, 7.07909791, 7.1168476 , 7.12643587, 7.15610456, 7.19698636, 7.09834314, 7.05124444, 7.06147316, 7.29265349, 7.38762255, 7.19255318, 7.0914197 , 6.99632408, 7.28783749, 7.40642556, 7.50042657, 7.52199961, 7.38090861, 7.31366312, 7.32918037, 7.41356871, 7.40686241, 7.34454923, 7.35754063, 7.36483637, 7.52229303, 7.45715298, 7.54329464, 7.35501191, 7.41806418, 7.37864369, 7.3268464 , 7.20434605, 6.99586801, 6.93583466, 7.11969473, 7.15938148, 7.44589042, 7.34313421, 7.30155559, 7.28786179, 7.36995234, 7.3420818 , 7.17021967, 7.27735024, 7.37770573, 7.41216788, 7.32619126, 7.48962489, 7.34112295, 7.35875597, 7.0881354 , 7.46850535, 7.47971955, 7.75637784, 7.64789912, 7.60647042, 7.65423208, 7.75347939, 7.87979044, 7.68933715, 7.70211081, 7.51374563, 7.57404798, 7.58926237, 7.84621756, 7.99034484, 8.04283399, 7.97958613, 7.93807446, 7.98169401, 7.8776668 , 7.73453558, 7.74164658, 7.97903408, 8.10268243, 8.03542065, 8.10972688, 8.04294297, 8.05633646, 8.03725912, 8.25983391, 8.38995519, 8.36962264, 8.17699733, 8.21024941, 8.39719101, 8.62435624, 8.66466254, 8.53202815, 8.59849915, 8.55345886, 8.7359906 , 8.61148309, 8.66471803, 8.58964817, 8.37817649, 8.4487452 , 8.29727521, 8.80497468, 9.13774425, 9.23056669, 9.05938092, 8.92915832, 8.95605045, 9.19371233, 9.21134305, 9.32966008, 9.44885488, 9.60703095, 9.68599202, 9.73857392, 9.58981375, 9.69326948, 9.69908055, 9.61247299, 9.59321922, 9.72546618, 9.82947886, 9.88234468, 9.80105886, 9.90076688, 9.88697706, 9.93188788, 10.07941562, 10.1883549 , 10.26928882, 10.24549213, 10.38841197, 10.56229069, 10.73973299, 10.68900618, 10.56318566, 10.8720509 , 11.10384486, 11.21957039, 11.08780539, 11.1755498 , 11.29213701, 11.66953016, 11.85629452, 12.08136708, 12.31552502, 12.54267264, 12.7436129 , 12.70261375, 12.63184165, 12.3234958 , 12.10415375, 11.75131106, 11.67532432, 11.51112149, 11.43912942, 11.27077754, 11.12796411, 10.98608465, 10.95421553, 10.81817012, 10.60892879, 10.34879649, 10.24336291, 10.18332674, 10.26584287, 10.34229355, 10.35252445, 10.21730733, 10.10098059, 10.03168354, 9.95282456, 9.79382044, 9.71416103, 9.59824455, 9.62126605, 9.41602153, 9.43508821, 9.30142416, 9.37191569, 9.36895303, 9.52453799, 9.32715386, 9.1983345 , 9.06336403, 9.19879466, 9.06028903, 8.93720321, 8.91570714, 8.91893331, 8.9922376 , 9.01113625, 9.14272431, 9.09864042, 9.00019683, 8.70994841, 8.65760632, 8.71252674, 8.83044602, 8.7077489 , 8.44856982, 8.36202746, 8.49380112, 8.43758768, 8.51522822, 8.39732377, 8.38316112, 8.16890344, 8.13487416, 8.10955735, 8.09696699, 8.02992363, 8.17105347, 8.18225026, 8.13724563, 8.0722829 , 8.25107359, 8.17611697, 8.04802661, 7.80321978, 7.88329972, 7.93738869, 7.90669758, 8.01759731, 8.04220377, 7.90675838, 7.70493407, 7.53787673, 7.62073091, 7.52546029, 7.70095934, 7.84623128, 8.0006942 , 7.89516578, 7.74835171, 7.64721769, 7.53282095, 7.64161662, 7.55674742, 7.62838586, 7.48794439, 7.42979731, 7.47872707, 7.48249818, 7.45731704, 7.27393537, 7.44293302, 7.50772531, 7.60515245, 7.43210472, 7.44673673, 7.45097998, 7.47935287, 7.35754501, 7.15439062, 7.13837326, 7.2174589 , 7.25192887, 7.18308351, 7.09712443, 7.15393078, 7.11611744, 6.98504757, 6.96222427, 7.23452273, 7.38547407, 7.4523931 , 7.44356096, 7.42744486, 7.40436835, 7.23342905, 7.09705073, 7.12021193, 7.24969532, 7.23342225, 7.22111859, 7.11009096, 7.23244932, 7.05444443, 7.11840265, 7.23738078, 7.238834 , 7.13244689, 7.02936601, 7.07470322, 7.18216904, 7.06915501, 7.10676358, 6.99505972, 7.03908845, 7.19477338, 7.28860964, 7.23505325, 7.09765474, 7.04976001, 7.04160299, 7.04334479, 7.1015781 , 7.18696615, 7.09222292, 6.97253299, 6.93880034, 7.03973312, 7.11494813, 7.03234211, 6.98742809, 6.77929055, 6.84197639, 6.95866474, 6.98850632, 6.99234258, 6.80117981, 6.79377084, 6.67441952, 6.71621183, 6.6648103 , 6.75270579, 6.73731868, 6.86448484, 6.82328277, 6.74100421, 6.73419727, 6.71847507, 6.87672801, 6.92205112, 7.02398639, 6.9724521 , 6.86443623, 6.76949467, 6.68317052, 6.67938603, 6.64126311, 6.71279214, 6.77487357, 6.82779673, 6.71670699, 6.61091739, 6.59593221, 6.69074946, 6.81515364, 6.76440899, 6.78353573, 6.72608694, 6.7629007 , 6.74374407, 6.71517095, 6.67005636, 6.67293791, 6.72497808, 6.76154375, 6.74949199, 6.70005328, 6.72457262, 6.76483267, 6.78789715, 6.78164388, 6.7401589 , 6.78448831, 6.77338756, 6.80087043, 6.75914855, 6.73225717, 6.70224985, 6.70150418, 6.66315441, 6.67396018, 6.6377038 , 6.69045353, 6.68431725, 6.76329228, 6.7355242 , 6.70520747, 6.61466211, 6.61972572, 6.64595276, 6.69601337, 6.70481754, 6.69784698, 6.63233624, 6.64712029, 6.76416368, 6.73909511, 6.71532065, 6.5486919 , 6.58517468, 6.61351347, 6.63310043, 6.62013832, 6.62029447, 6.61951258, 6.6607056 , 6.6548232 , 6.6497125 , 6.69929709, 6.68842114, 6.74815417, 6.73749318, 6.75484044, 6.71556177, 6.56280052, 6.48748225, 6.49914832, 6.5760775 ])
ptMax = np.argmax(array), np.max(array)
nbPairs = min(ptMax[0], len(array) - ptMax[0])
for i in range(1, nbPairs):
xDist = 2*i
yDist = array[ptMax[0]+i] - array[ptMax[0]-i]
# print(xDist, yDist)
plt.plot([ptMax[0] - i, ptMax[0] - i + xDist], [array[ptMax[0]-i], array[ptMax[0]-i] + yDist], color="black")
plt.plot(array, '+', markersize=6)
plt.plot(ptMax[0], ptMax[1], 'ro')
plt.show()
您只需要注意点在数组中的顺序是否正确。
结果：