Incorrect implementation of `scaleXTime()`/`scaleYTime()` "time delta" scales

[Jolanrensen]

Let's plot allows an axis to be scaled as a continuous time delta or "duration". I currently cannot find a way to easily plot a Duration like a number of hours/days/minutes etc.

For example: https://nbviewer.org/github/JetBrains/lets-plot-kotlin/blob/master/docs/examples/jupyter-notebooks/scale_time.ipynb

from: https://github.com/JetBrains/lets-plot-kotlin/blob/master/plot-api/src/commonMain/kotlin/org/jetbrains/letsPlot/scale/DateTime.kt

[Jolanrensen]

Oh actually, I see scaleXTime() is used in Kandy, but only for timeTypes (LocalTime and LocalTime?).

That may be incorrect usage, actually. I think scaleXDateTime is used for points in time, so Instant, LocalDateTime, but also LocalTime, and then scaleXTime is used for time deltas, so Duration or number of milliseconds.

[AndreiKingsley]

So basically you want kandy to handle Duration in the same way as LocalTime/LocalDateTime?

[Jolanrensen]

Yes and no:

• Instant, LocalDateTime, and LocalTime should use scaleXDateTime.
• Duration, and Period should use scaleXTime

[AndreiKingsley]

Hmm, I guess you're right. I need to do a little research and see if it works correctly, but in terms of implementation it won't be resource intensive at all - just need to take milliseconds value of your duration/period and apply scaleTime().