Sign up to take part
Registered users can ask their own questions, contribute to discussions, and be part of the Community!
Registered users can ask their own questions, contribute to discussions, and be part of the Community!
The Line > Smoothing option gives some weird artifacts with loops and multiple values of Y for a single value of X, which I found hilarious :
The same line chart without smoothing.
I'm guessing it's some kind of bezier curve but doing something with the control points that I don't understand.
Does anybody know for sure that kind of smoothing are they applying here?
and isn't there a more appropriate form of smoothing/ curve-fitting for this context, like regular spline smoothing?
Any way I created a Product Idea https://community.dataiku.com/t5/Product-Ideas/Implement-more-sensible-line-smoothing-algorithms/idi... to ask for support of other "smoothing" techniques
In case anyone want to reproduce it, I attached the dataiku_smoothing.csv file to this post. You just need to create a project > Dataset > New dataset > Upload your files > dataiku_smoothing.csv
Then navigate to the Dataset > Charts and add
* Show Y : quantity (AVG)
* By X: order_date (automatic)
The Lines > Smoothing (is on by default)
The result is
Hi @ecerulm ,
As mentioned in the support ticket on this topic, charts smoothing use a policy that avoids overstepping the real bounds of the data on the Y axis, as this would lead to creating wrongful min and max. One drawback of this policy is that it indeed can create artefacts on the X axis. You need to disable smoothing if you want to ensure no artefacts can occur, neither or X nor Y.
We've taken note of this feature request.
Thanks,