Python pyqtgraph实时绘图在调整大小后冻结
我正在pyqtgraph中绘制通过UDP接收的实时数据。每次更新2048个点,一切都很好,但当我尝试调整大小或放大时,4096或8k点的绘图就会冻结。如果我切换缩放,更新将继续。我已经验证了UDP流中没有间隙。也试着用Python pyqtgraph实时绘图在调整大小后冻结,python,pyqtgraph,Python,Pyqtgraph,我正在pyqtgraph中绘制通过UDP接收的实时数据。每次更新2048个点,一切都很好,但当我尝试调整大小或放大时,4096或8k点的绘图就会冻结。如果我切换缩放,更新将继续。我已经验证了UDP流中没有间隙。也试着用 # p.setDownsampling(auto=True) # p.setClipToView(True) 选项,但它们没有帮助 我读到pyqtgraph可以处理比这个多得多的数据,所以我有点困惑。这里可以看到问题: 这是代码,我直接从示例中获取,只做了一些小的更改 from
# p.setDownsampling(auto=True)
# p.setClipToView(True)
选项,但它们没有帮助
我读到pyqtgraph可以处理比这个多得多的数据,所以我有点困惑。这里可以看到问题:
这是代码,我直接从示例中获取,只做了一些小的更改
from pyqtgraph.Qt import QtGui, QtCore
import numpy as np
import pyqtgraph as pg
from pyqtgraph.ptime import time
from struct import pack, unpack
from socket import *
app = QtGui.QApplication([])
data = []
p = pg.plot(fillLevel=20)
p.setWindowTitle('pyqtgraph example: PlotSpeedTest')
p.setRange(QtCore.QRectF(0, 0, 30720000, 10 ))
p.setLabel('bottom', 'Frequency', units='Hz')
p.showGrid(True, True)
fScale = np.linspace(0, 30720000, 8192)
# p.setDownsampling(auto=True)
# p.setClipToView(True)
curve = p.plot()
# Receive UDP packets transmitted by a broadcasting service
sock = socket(AF_INET, SOCK_DGRAM)
try:
sock.bind(('', 1234))
except:
print "Error connecting to the UDP stream."
quit
ptr = 0
lastTime = time()
fps = None
def update():
global sock, fScale
global curve, data, ptr, p, lastTime, fps
stream = sock.recv(16384)
if (len(stream) == 16384):
data_float16 = np.fromstring(stream, dtype=np.float16)
data = data_float16.astype(np.float32)
print "got data", lastTime, "\n"
# print data
curve.setData(fScale,data,_callSync='off')
# curve.setData(data,_callSync='off')
now = time()
dt = now - lastTime
lastTime = now
if fps is None:
fps = 1.0/dt
else:
s = np.clip(dt*3., 0, 1)
fps = fps * (1-s) + (1.0/dt) * s
p.setTitle('%0.2f fps' % fps)
app.processEvents() ## force complete redraw for every plot
timer = QtCore.QTimer()
timer.timeout.connect(update)
timer.start(0)
## Start Qt event loop unless running in interactive mode.
if __name__ == '__main__':
import sys
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
QtGui.QApplication.instance().exec_()
如果数据中有任何
Inf
,则会混淆用于确定是否重新绘制绘图的边框计算。首先尝试清理数据:
data[np.isinf(data)] = np.nan
哇,你完全正确。我打印了数据,看到了一些Inf。我从来没有想到这一点。谢谢