在matplotlib/gnuplot中绘制标记的间隔

import matplotlib.pyplot as plt
import numpy as np

# 生成数据
x = np.linspace(0, 10, 100)
y = np.sin(x)

# 设置间隔
interval = 10

# 绘制图形
plt.plot(x[::interval], y[::interval], 'ro')
plt.xlabel('x')
plt.ylabel('y')
plt.title('Markers with Interval')
plt.show()

# 设置数据文件
set datafile separator ','
set datafile missing '?'
set xlabel 'x'
set ylabel 'y'
set title 'Markers with Interval'

# 设置间隔
interval = 10

# 绘制图形
plot 'data.csv' using 1:2 every interval with points pt 7 ps 2 lc rgb 'red'