enhance Plotly Parallel Coordinates Plot with Hover Data Functionality

I have implemented a Plotly parallel coordinates plot in a Dash app. The implementation process was straightforward which I appreciated. However, it appears that this type of plot currently does not support hover data functionality.

In applications where each observation (i.e., line) possesses a unique string identifier or label, which would not have its own separate axis, the absence of hover data becomes a significant limitation. Hover data can be used to quickly identify and distinguish between different observations.

For example, the Bureau of Reclamation's public web tool employs parallel coordinates plots to compare the multiobjective performance of various policies. As the user mouses over each line, the tool displays the policy's ID along with its corresponding values for the different axes.

I have attached a screen recording from the Bureau of Reclamation's web tool to illustrate this feature, which I think would be a great addition to Plotly's parallel coordiantes plots.

https://github.com/plotly/plotly.js/assets/127535108/f4ee26ab-8626-4558-ab66-45b3d72e411a

L’issue ne nomme aucun fichier, test ou point d’entrée. Commencez par localiser l’implémentation des coordonnées parallèles et son comportement au survol, puis déterminez comment un identifiant d’observation pourrait être fourni et affiché ; le travail est terminé lorsque les lignes de coordonnées parallèles peuvent afficher cet identifiant avec leurs valeurs d’axe au survol.