Visualize thresholds when plotting MetricValueWithThresholds

[kennysong]

When plotting a MetricValueWithThreshold value like (toxicity_values > 0.5).scatter(), we should draw a vertical line in the chart where the threshold is.

We could do this for the double scatter plot (langcheck.plot.scatter(toxicity_values > 0.5, sentiment_values > 0.5)) and the histogram as well ((toxicity_values > 0.5).histogram()).

[Vela-zz]

@kennysong Hi Song, I'm trying to add code for this feature now, but before I complete it, I want to ask is there any plan to support more Filter Syntax in the future？

toxicity_values > 0.5 and toxicity_values < 0.7
#
toxicity_values < 0.3 | toxicity_values > 0.7

I think it is also a new feature that can be added.

[kennysong]

Hi @Vela-zz, thanks for the PR! I don't think we're planning to support those multi-condition thresholds right now, so we can keep your PR focused on the existing binary threshold case.

If you're looking for other issues to work on, happy to chat more on Discord!

cc @yosukehigashi