search

distillpub / post--visual-exploration-gaussian-processes

A Visual Exploration of Gaussian Processes
http://distill.pub/2019/visual-exploration-gaussian-processes
101 stars 19 forks source link

Draggable Gaussian figure has confusing initial values #42

Open girving opened 5 years ago

girving commented 5 years ago

I stared at this figure in confusion for a while since it was axis aligned but had nonzero offdiagonal covariance, then finally realized the inconsistency goes away once you start dragging.

Screen Shot 2019-04-03 at 11 46 05 AM
claudio525 commented 4 years ago

Nice article, well written and easy to follow! Adding on to @girving comment, I came across the same issue and I believe the next plot (for conditioning & marginal distribution) has a similar issue. The initial central plot shows a joint distribution with the off-diagonal terms of the covariance matrix as zero, in which case the mean for the conditional distribution should just be zero independent of the conditioning value, yet it shows as 0.96 Again this issue is fixed once one starts dragging. Initial:

Screen Shot 2020-07-26 at 11 02 12 AM

With some dragging done:

Screen Shot 2020-07-26 at 11 07 06 AM