Nothing

```
######################################################################
#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/>.
######################################################################
u2 <-
function(x){
nrm <- two_norm(x[-1])
n <- length(x)
if(nrm < 1e-12){
c(0.5,0.5*rep(sqrt(1/(n-1)),n-1))
}else{
c(0.5, 0.5*(1/nrm)*x[-1])
}
}
```

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