Hello, I am attempting to acquire data from the plot generated by this
code, but when I attempt to export it via the right click menu I get the
following error:
>>> Traceback (most recent call last):
File
"C:\Users\KevinBrockman\AppData\Local\Continuum\Anaconda2\lib\site-packages\pyqtgraph\exporters\Exporter.py",
line 72, in fileSaveFinished
self.export(fileName=fileName, **self.fileDialog.opts)
File
"C:\Users\KevinBrockman\AppData\Local\Continuum\Anaconda2\lib\site-packages\pyqtgraph\exporters\CSVExporter.py",
line 48, in export
numRows = reduce(max, [len(d[0]) for d in data])
TypeError: object of type 'NoneType' has no len()
If anyone could help me get the export working it would be greatly
appreciated.
from pyqtgraph.Qt import QtGui, QtCore
import numpy as np
import pyqtgraph as pg
import serial
app = QtGui.QApplication([])
p = pg.plot()
p.setWindowTitle('live plot from serial')
curve = p.plot()
data = [0]
raw=serial.Serial(8,115200)
#raw.open()
def update():
global curve, data
line = raw.readline()
data.append(float(line))
xdata = np.array(data, dtype='float64')
curve.setData(xdata)
app.processEvents()
timer = QtCore.QTimer()
timer.timeout.connect(update)
timer.start(0)
if __name__ == '__main__':
import sys
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
QtGui.QApplication.instance().exec_()
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