Archive for the pictures Category

c’est reparti !

Posted in Books, Kids, pictures, Running with tags on February 24, 2015 by xi'an

Creparti

Katedrála svatého Víta, Václava a Vojtěch

Posted in Kids, pictures, Travel with tags , , , , on February 23, 2015 by xi'an

stvitus

barokní Praha

Posted in Kids, Travel, pictures with tags , , , , , on February 22, 2015 by xi'an

barok

in a time lapse

Posted in Kids, pictures with tags , , on February 21, 2015 by xi'an


steps

Posted in Mountains, pictures, Running, Travel with tags , , , on February 20, 2015 by xi'an

groove1

snímek z Prahy [#3]

Posted in Kids, pictures, Running, Travel with tags , , , , , on February 19, 2015 by xi'an

commun

amazing Gibbs sampler

Posted in Books, pictures, R, Statistics, University life with tags , , , , , , on February 19, 2015 by xi'an

BayesmWhen playing with Peter Rossi’s bayesm R package during a visit of Jean-Michel Marin to Paris, last week, we came up with the above Gibbs outcome. The setting is a Gaussian mixture model with three components in dimension 5 and the prior distributions are standard conjugate. In this case, with 500 observations and 5000 Gibbs iterations, the Markov chain (for one component of one mean of the mixture) has two highly distinct regimes: one that revolves around the true value of the parameter, 2.5, and one that explores a much broader area (which is associated with a much smaller value of the component weight). What we found amazing is the Gibbs ability to entertain both regimes, simultaneously.

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