[syncfusion_flutter_charts] linear and polynomial Trendline are don't cover all values

[christianreiser]

The linear and polynomial trendlines are too small, as shown here:

(Here is the code generating this chart)

Would be better if they would cover all values, as shown below:

[Yuvaraj-Gajaraj]

Hi @christianreiser

Thanks for the interest in our Flutter charts. We have investigated your query and the reported scenario is not reproduced at our end. The linear and polynomial trendline renders properly as expected. We have attached the sample which we have used for testing. Kindly try to replicate the reported scenario with the below sample and get back to us, this will be much helpful in providing the solution earlier. And also, we request you to ensure this issue with our latest version (19.3.43) of the chart package.

Screenshot:

Sample: sample.zip

Thanks,

Yuvaraj G.

[christianreiser]

Thanks for your investigation.
I replicated the problem in your sample by adding two additional data points at the beginning and end of the list in _updateDataSource.

sample (1).zip

You should see that the linear trendline starts and ends on the x-Value of these points:

Thanks, Chris

[Yuvaraj-Gajaraj]

Hi @christianreiser,

Greetings from Syncfusion. We have analyzed your query and that the reported scenario can be replicated at our end. We will this as a bug and provide a fix at the next weekly patch release which is expected to be rolled out by the third week of October. We appreciate your patience until then.

Thanks,
Yuvaraj.

[Yuvaraj-Gajaraj]

Hi @christianreiser,

We are glad to let you know that the reported issue that is trendline does not cover all points has been fixed and rolled out in our weekly patch release. To resolve this, kindly upgrade the chart widget package to the latest version below.

https://pub.dev/packages/syncfusion_flutter_charts/versions/19.3.46

Regards,
Yuvaraj.