Feature: Add regex filtering field to "Custom Scalar" plugin

[josiahls]

I currently have a custom scalar graph for showing motion entropy and reward per episode.
So I needed a graph per episode and is accomplished via add_scalar. I am bothered by not being able to filter the episodes because as you can see below, there are a lot of episodes and thus a lot of graphs:

Maybe I just need to understand tensorboard better, but I would like to enable to regex filter like in the other pages:

Is there a simple way to add the regex filter for the custom scalars plugin? Or has this been removed? (#300 originally shows being able to do this)

[nfelt]

The reason the custom scalars plugin doesn't have a regex filter for tags is because regex filtering is already the mechanism for choosing which tags are used for each plot, although it works differently because it's configured up-front as part of the custom scalar layout definition.

In theory we could allow further filtering the set of tags show using a tag filter, but this could be confusing because it would behave quite differently from the other places it's used like the scalars dashboard, where the tag filter controls which line charts are shown, but not what data is shown within each chart. In the scalars dashboard, control over what actual series of data appear on the chart is a controlled instead by the run selector.

It sounds like what would perhaps be more useful to you is if you could map each episode to a "run" and then just use the regular scalars dashboard to show the comparison across episodes/runs for the metrics of interest. Is it possible for you to structure your logging that way instead?