Question

下面是一部法典,它设计了一条星体,并在其中增加了一条龙头:

import numpy as np
import matplotlib.pyplot as plt

# sine wave parameters
A = 5  # Increased Amplitude
f = 1  # Frequency in Hz
T = 1/f  # Period
t = np.linspace(0, 2*T, 1000)  # Time from 0 to 2 periods

# Create a sine wave
sine_wave = A * np.sin(2 * np.pi * f * t)

# Digital signal (sampled)
sampling_rate = 10
sampling_interval = 1 / sampling_rate
sample_times = np.arange(0, 2*T, sampling_interval)
sampled_sine_wave = A * np.sin(2 * np.pi * f * sample_times)

# Plot the results with a step function representing the digital signal and label the points
plt.figure(figsize=(12, 8))
plt.plot(t, sine_wave, label= Continuous Sine Wave )
plt.step(sample_times, sampled_sine_wave,  r- , where= post , linewidth=2, label= Digital Signal (Step Wave) )

# Label each point on the step function
for x, y in zip(sample_times, sampled_sine_wave):
    label = f"{y:.2f}"
    plt.annotate(label, (x, y), textcoords="offset points", xytext=(0,10), ha= center , fontsize=8, color= blue )

plt.title( Analog Sine Wave and Digital Step Signal with Labels )
plt.xlabel( Time )
plt.ylabel( Amplitude )
plt.legend()
plt.grid(True)
plt.show()

结果是:

是否有办法确定这一点,谁是arrow?

Answer 1

http://docs.python.org/3/library/Functions.html#zip"rel=“nofollow noreferer”>::

for xl, xr, y in zip(sample_times, sample_times[1:], sampled_sine_wave):
    label = f"{y:.2f}"

    plt.annotate(label, (xl, y), textcoords="offset points",
                 xytext=(0,10), ha= center , fontsize=8, color= blue )

    plt.annotate(label, (xr, y), textcoords="offset points",
                 xytext=(0,10), ha= center , fontsize=8, color= green )

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