Question about 3d plot

[Wan-Yifei]

Hi Chris,

Attached is a snap of my 3d plot:

There is a big cluster in the bottom left corner but then nothing in a large area upper right. Many of the circles are cut off. But when I review the demo of 3d plot in the README, I found no circles are cut off.

What's the matter of my plot?

Furthermore, the labeling isn’t completely straightforward with the arrows placed at the end of the axes. I wonder if this can’t be fixed up a bit more and some kind of legend provided.

Thank you!!😊