I don't know what im doing wrong [ TypeError: cannot perform reduce with flexible type ]

[Stefan Wijnbelt]

Part of the code:

curves = [0]*len(y)
for i in range(0,len(y)):

            if headers[i][0:3] == 'fit':

                print('try')

                curves[i] = self.p.plot(pen='r',name='happy') # crashes

            else:

                curves[i] = self.p.plot(pen=None,symbol='o',name=headers[i], symbolSize=1, symbolPen=self.colors[i]) # works

                print('hi')

            curves[i].setData(x, y[i])

x is a list of the time (floats)

y is a list of list of data to plot (floats)

headers is a list of headers (string)

self.colors is a list of RGB colors (tupples)

The code crashes on

curves[i] = self.p.plot(pen='r',name='happy') # crashes

While

curves[i] = self.p.plot(pen=None,symbol='o',name=headers[i], symbolSize=1, symbolPen=self.colors[i]) # works

works just fine

Error:

Traceback (most recent call last):

  File "C:\Python37\lib\site-packages\pyqtgraph\graphicsItems\PlotCurveItem.py", line 174, in boundingRect

    (xmn, xmx) = self.dataBounds(ax=0)

  File "C:\Python37\lib\site-packages\pyqtgraph\graphicsItems\PlotCurveItem.py", line 131, in dataBounds

    b = (np.nanmin(d), np.nanmax(d))

  File "<__array_function__ internals>", line 6, in nanmin

  File "C:\Python37\lib\site-packages\numpy\lib\nanfunctions.py", line 320, in nanmin

    res = np.fmin.reduce(a, axis=axis, out=out, **kwargs)

TypeError: cannot perform reduce with flexible type

[Stefan Wijnbelt]

i want to change the part it crashes on to:

curves[i] = self.p.plot(pen=self.colors[i],name=headers[i])

 but i tried to keep it simple with

[megan kratz]

Hi Stefan,

Have you tried giving the x,y data to the plot curve when it is created instead of creating it then using setData? Like so:

curves = [0]*len(y)
for i in range(0,len(y)):

            if headers[i][0:3] == 'fit':

                print('try')

                curves[i] = self.p.plot(x, y[i], pen='r',name='happy') # crashes

            else:

                curves[i] = self.p.plot(x, y[i], pen=None,symbol='o',name=headers[i], symbolSize=1, symbolPen=self.colors[i]) # works

                print('hi')

            #curves[i].setData(x, y[i])

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