Possibility to choose any scalar for horizontal x-axis

[jdn-kvantify]

Proposal Summary

When viewing scalar graphs it would be nice to be able to choose any scalar as horizontal axis, e.g. an epoch counter or total train instance counter (that is something I usually log anyway).

Motivation

Makes it easier to compare the evolution of experiments that have been run with different batch sizes and hence different amount of data having been processed with each step. As a workaround I usually log scalars with a step value that is incremented by the number of data instances processed, but would be nice to be able to switch around between different (monotonically increasing) scalar values.

[Antho1426]

Hi @jdn-kvantify,
Thank you for opening this issue! This feature request also interests me a lot 🙏.
In my case, I would like to be able to freely change the x-axis label from "Iterations" (apparently fixed for now) to "Epochs" for some specific scalars only.
Below is an example where I log mIoU over epochs (on the left) and time over iterations (on the right). As you can see, it would be very nice to be able to change the x-axis label only for the plot on the left from default "Iterations" to "Epochs" to make it clearer! 😃