tag:blogger.com,1999:blog-10448119.post7303534024919570361..comments2024-03-23T06:42:53.608-04:00Comments on Hogg's Research: do clusters dissolve? and don't add pdfsHogghttp://www.blogger.com/profile/18398397408280534592noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-10448119.post-63036212720588419682013-03-24T14:46:51.382-04:002013-03-24T14:46:51.382-04:00You'll find this point made in the upcoming CA...You'll find this point made in the upcoming CANDELS photo-z methods paper as well. . . hierarchical techniques end up not being too expensive in that application (but are outperformed by taking the median of the ~5 best photo-z estimates). Jeffrey Newmannoreply@blogger.comtag:blogger.com,1999:blog-10448119.post-59128888320365654272013-03-22T04:24:59.102-04:002013-03-22T04:24:59.102-04:00"Fundamentally, adding up pdfs is never a goo..."Fundamentally, adding up pdfs is never a good idea."<br /><br />Nitpicky comment: Marginalization is a weighted sum of PDFs. ;-) Just being silly here, it's got nothing to do with what you're saying.<br /><br />I believe Loredo had a paper a few years back where he showed why hierarchical modelling is needed in that situation (it was the paper where I first heard about what you call "extreme deconvolution").Brendon J. Brewerhttp://stat.auckland.ac.nz/~brewer/noreply@blogger.comtag:blogger.com,1999:blog-10448119.post-29387015478865306292013-03-22T04:01:34.606-04:002013-03-22T04:01:34.606-04:00"I think maybe I need to write a Data Analysi..."I think maybe I need to write a Data Analysis Recipes on this."<br /><br />Yes, Please!Jessica Luhttp://www.astro.caltech.edu/~jlunoreply@blogger.comtag:blogger.com,1999:blog-10448119.post-81493628216844298892013-03-22T00:35:30.169-04:002013-03-22T00:35:30.169-04:00Hi David,
I hadn't read the paper on fitting ...Hi David,<br /><br />I hadn't read the paper on fitting distributions before---very interesting. Sort of similar to some work I have done on the BH mass distribution from XRB observations. You might also be interested in this paper by my colleague, Ilya Mandel, that could have been titled "don't add the PDFs": http://arxiv.org/abs/arXiv:0912.5531Will Farrhttps://www.blogger.com/profile/11756898910041903896noreply@blogger.com