search for: johannesson1

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2004 Apr 14
2
attaching data.frame/list within a function
...ot;package:utils" "Autoloads" "package:base" [1] 0 > Thanks, Gardar ___________________________________________________________________ Gardar Johannesson Lawrence Livermore National Laboratory 7000 East Avenue, L-229 Livermore, CA 94550 johannesson1@llnl.gov Tel: (925) 422-3901, Fax: (925) 422-4141 [[alternative HTML version deleted]]
2007 Apr 24
1
Matrix: how to re-use the symbolic Cholesky factorization?
I have been playing around with sparse matrices in the Matrix package, in particularly with the Cholesky factorization of matrices of class dsCMatrix. And BTW, what a fantastic package. My problem is that I have to carry out repeated Cholesky factorization of a spares symmetric matrices, say Q_1, Q_2, ...,Q_n, where the Q's have the same non-zero pattern. I know in this case one does
2005 Jan 04
2
x11 is not available
Dear list, I have problems installing R-2.0.1 on SUSE Linux 9.2. I used the following commands in order install R in /usr/local ./configure --with x11 --with-readline make make install When starting R and trying to display a plot on the X-window system output is written to a postscript file. When I try to run x11 with >x11() Error in X11(): X11 is not available. I do have a running
2003 Oct 16
1
Improving efficiency in "outer"-like calculation
Hello, I am doing mcmc=10000 simulations from a posterior distribution of the parameters of a mixture of K=6 normal densities. I have mcmc by K matrices simMeans, simVars and simWeights containing the simulation output: one row for each simulation, one column for each normal component of the mixture. One thing I would like to do is a plot of the posterior predictive density. In order to do that