Displaying 7 results from an estimated 7 matches for "daejin".
Did you mean:
daebian
2008 Feb 15
1
Conditional Autoregressive (CAR) model simulation
...________________________
Dae-Jin Lee
Office/Despacho: 7.3.J04
Phone/Tlfno:+34 91 624 9175
Fax: +34 91 624 9430
Departamento de Estadística
Av. Universidad 30, Ed. Juan Benet
28911 Leganés (Madrid), SPAIN
Universidad Carlos III de Madrid
e-mail: dae-jin.lee@uc3m.es
web: http://www.est.uc3m.es/daejin
__________________________________
[[alternative HTML version deleted]]
2007 Mar 06
1
optim(), nlminb() and starting values
Hi all !
I've been trying to maximize a likelihood using optim( ) function, but it
seems that the function has several local maxima. I've tried in my algorithm
with different starting values and depending on them "optim" obtains
different results...
I use the "L-BFGS-B" method setting the lower values as 1e-06, because my
parameters must be strictly positive. Also
2007 Jul 30
1
stop criteria when "L-BFGS-B needs finite values of 'fn' " in optim
...,
Dae-Jin
--
__________________________________
Dae-Jin Lee
Despacho: 7.3.J04
Tlfno: 91 624 9175
Fax: 91 624 9430
Departamento de Estadística
Av. Universidad 30, Ed. Juan Benet
28911 Leganés (Madrid)
Universidad Carlos III de Madrid
e-mail: dae-jin.lee@uc3m.es
web: http://www.est.uc3m.es/daejin
__________________________________
[[alternative HTML version deleted]]
2011 Jun 06
1
Lasso for k-subset regression
Dear R-users
I'm trying to use lasso in lars package for subset regression, I have a
large matrix of size 1000x100 and my aim is to select a subset k of the 100
variables.
Is there any way in lars to fix the number k (i.e. to select the best 10
variables)
library(lars)
aa=lars(X,Y,type="lasso",max.steps=200)
plot(aa,plottype="Cp")
aa$RSS
which.min(aa$RSS)
2011 Dec 16
1
optim with simulated annealing SANN for combinatorial optimization
Hi all
I am trying to solve a combinatorial optimization problem. Basically, I can
reduce my problem into the next problem:
1.- Given a NxN grid of points, with some values in each cell
2.- Find the combination of K points on the grid such that, the maximum
mean value is obtained
I took the Travel SalesMan problem example in ?optim documentation. I am
not sure if I have understood correctly
2007 Jan 12
1
R2WinBugs and Compare DIC versus BIC or AIC
Dear All
1)
I'm fitting spatial CAR models
using R2Winbugs and although everything seems to go reasonably well (or I
think so)
the next message appears from WINBUGS 1.4 window:
gen.inits()
Command #Bugs: gen.inits cannot be executed (is greyed out)
The question is if this message means that something is wrong and the
results are consequently wrong, or Can I assume it as a simple warning
2007 Oct 02
3
mcv package gamm function Error in chol(XVX + S)
Hi all R users !
I'm using gamm function from Simon Wood's mgcv package, to fit a spatial
regression Generalized Additive Mixed Model, as covariates I have the
geographical longitude and latitude locations of indexed data. I include a
random effect for each district (dist) so the code is
fit <- gamm(y~s(lon,lat,bs="tp", m=2)+offset(log(exp.)),
random=list(dist=~1),