R/jordan_sym.R

In CLSOCP: A smoothing Newton method SOCP solver

######################################################################
#Copyright Jason Rudy & Faramarz Valafar 2009-2010

#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation, either version 3 of the License, or
#(at your option) any later version.

#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.

#You should have received a copy of the GNU General Public License
#along with this program.  If not, see <http://www.gnu.org/licenses/>.
######################################################################

jordan_sym <-
function(x){
	n <- length(x)
	out <- matrix(rep(0,n^2),n,n)
	out[1,] <- x
	out[,1] <- x
	diag(out) <- x[1]
	return(out)
}