Archive for the pictures Category
c’est reparti !
Posted in Books, Kids, pictures, Running with tags Charlie Hebdo on February 24, 2015 by xi'an
Katedrála svatého Víta, Václava a Vojtěch
Posted in Kids, pictures, Travel with tags Czech Republic, Gothic cathedral, Prague, Prague Castle, Saint Vitus cathedral on February 23, 2015 by xi'an
barokní Praha
Posted in Kids, Travel, pictures with tags baroque, church, Church of Saint Nicolas, Czech Republic, Kostel svatého Mikuláše, Prague on February 22, 2015 by xi'an
in a time lapse
Posted in Kids, pictures with tags In a time lapse, Ludovico Einaudi, minimalist composer on February 21, 2015 by xi'an
steps
Posted in Mountains, pictures, Running, Travel with tags Czech Republic, Giant Mountains, Snow Crash, Špindlerův Mlýn on February 20, 2015 by xi'an
snímek z Prahy [#3]
Posted in Kids, pictures, Running, Travel with tags art nouveau, Czech Republic, Municipal Building, Obecní dům, Prague, Smetana Hall on February 19, 2015 by xi'an
amazing Gibbs sampler
Posted in Books, pictures, R, Statistics, University life with tags bayesm, convergence assessment, Gibbs sampler, Jean-Michel Marin, Markov chain Monte Carlo, mixtures, R on February 19, 2015 by xi'an
When 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.
