我如何 label 来自 scipy.signal.find_peaks 的峰值及其值？

Question

I can easily get scipy.signal.find_peaks to plot peaks (example from the documentation):

import matplotlib.pyplot as plt
from scipy.misc import electrocardiogram
from scipy.signal import find_peaks

x = electrocardiogram()[2000:4000]

peaks, _ = find_peaks(x, distance=150)
np.diff(peaks)

plt.plot(x)
plt.plot(peaks, x[peaks], '.')
plt.show()

And getting the values of peaks is also easy:

But how can I plot x[peaks] either in place of the dot or nearby?

I had expected plt.plot(peaks, x[peaks], x[peaks]) would have worked, but no.

Answer 1

The only workable solution I found was using the more upvoted answers here that J. Choi referenced

fig, ax = plt.subplots()
ax.scatter(p, q)
plt.gcf().set_size_inches(20, 10)
for i, txt in enumerate(p):
    ax.annotate(txt, (p[i], q[i]))

plt.plot(x)
plt.plot(peaks, x[peaks], 'x')
plt.show()

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