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嘗試在直接連接到rpi3的屏幕上顯示UI,mainy實時數據圖形和統計信息。
使用一些示例代碼中試圖顯示任何東西,但運行示例代碼時,我只能得到一個警告消息:
「警告:QXcbConnection:無法連接到顯示」
據我瞭解,我已經安裝了所有的依賴numpy,matlibplot,pyqt5等。假設在視頻後面的rpi上啓用opwnGL How to Enable OpenGL in Raspberry Pi 不能理解主要問題。首先是有可能在樹莓上使用vispy,並有任何建議,我如何連接到我的代碼顯示?
示例代碼:
import numpy as np
from vispy import app
from vispy import gloo
c = app.Canvas(keys='interactive')
vertex = """
attribute vec2 a_position;
void main (void)
{
gl_Position = vec4(a_position, 0.0, 1.0);
}
"""
也試過的例子從Matplotlib Animation Tutorial
但是,這也結束了一個錯誤: 「_thinker.TclError:coulnt連接到顯示」
import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation
// First set up the figure, the axis, and the plot element we want to animate
fig = plt.figure()
ax = plt.axes(xlim=(0, 2), ylim=(-2, 2))
line, = ax.plot([], [], lw=2)
// initialization function: plot the background of each frame
def init():
line.set_data([], [])
return line,
// animation function. This is called sequentially
def animate(i):
x = np.linspace(0, 2, 1000)
y = np.sin(2 * np.pi * (x - 0.01 * i))
line.set_data(x, y)
return line,
// call the animator. blit=True means only re-draw the parts that have changed.
anim = animation.FuncAnimation(fig, animate, init_func=init,
frames=200, interval=20, blit=True)
anim.save('basic_animation.mp4', fps=30, extra_args=['-vcodec', 'libx264'])
plt.show()
只想保留更新: 通過使用easy_install更新pyqt5安裝來解決它。以前安裝的版本(通過sudo apt-get install python3.pyqt5)無效 – kitaps