# Copyright (C) 2008-2009 - INRIA - Michael Baudin
# Copyright (C) 2009-2010 - DIGITEO - Michael Baudin
# Copyright (C) 2010-$year$ - Sebastien Bihorel
#
# This file must be used under the terms of the CeCILL.
# This source file is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at
# http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
#
# This source code is a R port of the neldermead component
# originally written by Michael Baudin for Scilab :
# "Nelder-Mead User's Manual", 2010, Consortium Scilab - Digiteo,
# Michael Baudin, http://wiki.scilab.org/The_Nelder-Mead_Component
neldermead.scaletox0 <- function(this=NULL,simplex0=NULL){
hasnlcons <- optimbase.hasnlcons(this=this$optbase)
nbve <- optimsimplex.getnbve(this=simplex0)
x0 <- optimbase.get(this=this$optbase,key='x0')
for (ive in 2:nbve){
# Transpose, because optimsimplex returns row vectors
x <- transpose(optimsimplex.getx(this=simplex0,ive=ive))
this <- neldermead.log(this=this,
msg=sprintf(paste('Scaling vertex #%d/%d at [',strvec(x),']... ',sep=''),
ive,nbve))
# Transpose x into a row vector
tmp <- scaleinconstraints(this=this,x=x,xref=x0)
this <- tmp$this
status <- tmp$isscaled
xp <- tmp$p
rm(tmp)
if (!status)
stop(sprintf('neldermead.startup: Impossible to scale the vertex #%d/%d at [%s] into inequality constraints',
ive,nbve,strvec(x)),
call.=FALSE)
if (any(x!=xp)){
tmp <- optimbase.function(this=this$optbase,x=xp,index=2)
if (hasnlcons){
fv <- tmp$f
c <- tmp$c
index <- tmp$index
} else {
fv <- tmp$f
index <- tmp$index
}
# Transpose xp, which is a column vector
simplex0 <- optimsimplex.setve(this=simplex0,ive=ive,fv=fv,x=transpose(xp))
}
}
return(simplex0)
}
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.