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index.Rmd
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---
title: "Home"
site: workflowr::wflow_site
output:
workflowr::wflow_html:
toc: false
---
## Current
[Note 1.](obj_notes.html) Notes on computing the FLASH objective function. I derive an explicit expression for the KL divergence between prior and posterior.
[Note 2.](flash_em.html) An alternate algorithm for optimizing the FLASH objective, using the explicit expression derived in the previous note.
[Investigation 4.](alt_alg.html) The alternate algorithm yields much different results from FLASH. In particular, the fits of the priors on the loadings are visibly different.
## Archived
The bug causing the problem described in Investigations 1-3 was fixed in version 0.1-13 of package `ebnm`.
[Investigation 1.](objective.html) The FLASH objective function can behave very erratically.
[Investigation 2.](objective2.html) This problem only occurs when using `ebnm_pn`, not `ebnm_ash`.
[Investigation 3.](objective3.html) The objective can continue to get worse as loadings are repeatedly updated. Nonetheless, convergence takes place (from above!).