Sean Pinkney

Wonderful apotropaic marks!

Halloween @mc-stan.org

Try this computing.stat.berkeley.edu/tutorial-par...

I'll take one if you have any left

Which base measure are we in?

So go re-run your models with simplex and report back with your results!

and to be comparable, if not a bit better, in all other cases.

What has changed is that we use the sum-to-zero vector transform and then softmax it. There are still n-1 free variables but the over/underflow for finite precision computing is less likely. 2/

Stan 2.37 will be out sometime next week. I helped get the updated simplex parameterization and sum-to-zero matrix (both rows and columns sum to zero).

We found the new simplex parameterization to be much better in the extremes of the simplex and across very small alpha values of the dirichlet 1/

Ask me any questions you may have about this! #stats

Q

This is the pre-pre-print of the meta-meta-analysis

I've come on here after months away to let everyone know that I apparently really like trance music

Oh I first read this as the water cycle is changing as a good thing rather than a permanent thing

Hi!

Are there any other statistics nerds in the NoVA area that want to get together?

😈

Updated cholesky corr parameterization testing Promising results from the Pymc folks Confirmation that the det Jacobian is correct and early tests show improved sampling!

Promising results from the Pymc folks! #bayesian #pymc #stats #stan

discourse.mc-stan.org/t/updated-ch...

Hi I don't know you, you don't know me but I have the same feels. Come say hi sometime to me

Please let me know! I'd love to see timing and ESS comparisons

It's similar to what Adam Haber came up with for tfp but it seems to be slightly better in small dimensions and much faster in large (100+) though this could be because of Stan's implementation vs tfp.

Updated cholesky corr parameterization testing Hi everyone, I’m asking if people could test out this parameterization of the Cholesky factor of correlation matrices? From my tests on a macpro m1, it looks to be much faster and I can easily sample...

Fellow probabilistic programmers I came up with a parameterization for a Cholesky factor of correlation matrices that looks good. I'm asking to test and see if it works well for you discourse.mc-stan.org/t/updated-ch...

#rstats #statistics #bayesian

I don't know wtf this is but I'm super into matrices so the non-matrix theology is a non-starter for me

I will only be impressed by you if you solve a long standing mathematical conjecture and win the Tour de France within 2 years of each other. Otherwise, what are you even doing?

Basically he Colin from What We Do in The Shadows

Congrats!

Functions are encouraged! You can even write functions in a file with .stanfunctions ending and include it mc-stan.org/docs/stan-us...

"Painting to be stepped on." Do not step on the painting!

Reminds me of when I tried salvia in college. I immediately ran into the bathroom and started splashing water on my face to stop feeling like I was going to die. Is that stuff still legal? I do not recommend