Okay, I've not been able to replicate this. Can you post some example code
that produces this error?

On Tue, May 19, 2020 at 9:43 AM Lavinia B <[email protected]> wrote:

> Hi,
> The numbers correspond to the dimensions of the ROI rectangle I drag. I am
> pretty sure it's that, as the exception modifies with my changes... and
> goes away when I create a perfect square.
> For example:
>           Exception: X and Y arrays must be the same shape--got (38,) and
> (22,).
>
>
> On Tuesday, May 19, 2020 at 5:26:24 PM UTC+2, megan wrote:
>>
>> Hi,
>>
>> That is an error that occurs when you attempt to plot data that has a
>> different number of x and y values. I need more information in order to
>> understand why you're getting that error though. What are the shapes in the
>> error? Can you post the whole traceback?
>>
>> Megan
>>
>> On Tue, May 19, 2020 at 9:17 AM Lavinia B <[email protected]> wrote:
>>
>>> Hi,
>>> I have an ImageView in which I set data with mode=rgba. When I try to
>>> use the ROI , the plot  gives me warnings if the ROI is not perfectly
>>> square.
>>> "..\src\pyqtgraph\pyqtgraph\graphicsItems\PlotCurveItem.py", line 385,
>>> in updateData
>>>     raise Exception("X and Y arrays must be the same shape--got %s and
>>> %s." % (self.xData.shape, self.yData.shape))
>>>
>>> I don't understand why is this enforced. Can somebody explain?
>>>
>>> Note: this does not happen for mono images, or if I keep my selection
>>> shape square.
>>>
>>>
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>>> .
>>>
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