在while循环中，我将更新绘图中的两组数据（一些数据X和一个阈值）。现在，我想在同一图上添加单个点（X的峰值）。我怎样才能做到这一点？
import matplotlib.pyplot as plt
plt.ion()
fig = plt.figure()
plt_ps = fig.add_subplot(111)
# initialize plots
powerspectrum, = plt_ps.plot(np.zeros([windowSize,]))
threshold, = plt_ps.plot(np.zeros([windowSize,]))
peaks, = plt_ps.plot([], [], 'or') # peaks will just be a set of coordinates, eg peaks_x=[2,4,7] and peaks_y=[3,7,6]
while(somecondition):
# some data processing
powerspectrum.set_ydata(new_powerspectrum_data)
threshold.set_ydata(new_threshold_data)
#peaks.? how do I set new peaks? Tried peaks.set_data(peaks_x, peaks_y) but peaks do not show up
plt_ps.relim()
plt_ps.autoscale_view()
fig.canvas.draw()
只需使用plot正确的样式即可：
import matplotlib.pyplot as plt
xs = [1,2,5,3,6,7,1,3,4,5,2,6,7,8,2,1]
ys = [3,4,5,2,7,1,3,4,1,2,3,4,5,2,3,1]
plt.plot(xs,ys,'.')
plt.show()
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我来说两句