Hi @bernhardbreuss, sorry it took so long for me to get to this!

This is a hard problem, but I think your solution is a good one. Unfortunately I can't edit contents of this pull request. Can you edit it to give me permissions to make changes, then I'll make some small updates and merge it in? Thanks! 🚀

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/allowing-changes-to-a-pull-request-branch-created-from-a-fork

Hi @swharden, I am afraid but the information in the provided link seems only to work for forks owned by a personal account. However I have added you as a collaborator. Hopefully this way you can also edit the PR branch.

added you as a collaborator

That worked, thanks! I'll make a few changes then merge this in shortly. I recommend not committing new changes on your end while I'm actively working on it 👍

Thanks again for starting this PR! This will be a great improvement to the library 🚀

I reached a good compromise in my last few commits.

• There's now a private flag variable which indicates whether Xs have been validated or not.

• Assigning Xs resets this flag, and the validation isn't performed until Render() is called.

• This gives the user time to assign data and set min/max indexes before validation occurs.

• This strategy also ensures Xs is always checked at least once before the first render, hopefully catching the common user of attempting to plot data with non-ascending X values.

Hi @swharden, thank you for your hard work. ScottPlot is a great lib, easy and straight forward to use.