Hi Vasilije,
I used your suggestions and made a small test. I still have exception
("len(X) must be len(Y)+1 since stepMode=True (got (0L,) and (0L,))") when
I zoom in/out my plot. In attachment is my test case scenario.
On Tuesday, February 7, 2017 at 5:38:18 PM UTC+1, Marija Zupunski wrote:
>
> Hi guys,
>
> I would like to draw plot items using stepMode=True and after that I would
> like to use setDownsampling() and setClipToView(). I have exception when i
> send data saying that:
>
> "len(X) must be len(Y)+1 since stepMode=True"
>
> I set length of x and y values, but still I have the same exception when I
> call setDownsampling() and setClipToView()
>
> My code is something like this:
>
>
> # len(x_value) == len(y_value)
>
> self.subplot.plot(x=signal.x_value, y=signal.y_value[:-1], pen=signal.color,
> name=signal.name, stepMode=True)
> self.subplot.setDownsampling(ds=True, auto=False, mode='peak')
> self.subplot.setClipToView(clip=True)
>
>
>
> Is there something wrong that I am doing?
>
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import pyqtgraph as pg
from pyqtgraph.Qt import QtCore, QtGui
import numpy as np
from random import *
win = pg.GraphicsWindow()
win.setWindowTitle('pyqtgraph example: Scrolling Plots')
randBinList = lambda n: [randint(0, 1) for b in range(1, n+1)]
p1 = win.addPlot()
data1 = np.random.normal(size=300)
data2 = randBinList(300)
curve1 = p1.plot(data1)
curve2 = p1.plot(stepMode=True)
curve2.setData(y=data2, x=range(len(data2) + 1))
p1.setClipToView(True)
p1.setDownsampling(ds=True, auto=False, mode='peak')
## Start Qt event loop unless running in interactive mode or using pyside.
if __name__ == '__main__':
import sys
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
QtGui.QApplication.instance().exec_()
