Displaying 20 results from an estimated 1000 matches similar to: "using user-supplied derivatives in rgenoud"
2010 Oct 13
2
How to fix error in the package 'rgenoud'
Dear R user fellows,
I would like to ask you about the package 'rgenoud' which is a genetic
optimization tool.
I ran the function 'genoud' with two variables to be minimized by the
following command.
result<-genoud(fn,nvars=2,starting.values=c(0.5,0),
pop.size=1000, max.generations=10, wait.generations=3)
Then, I had the following error message.
Error in
2007 May 09
3
Increasing precision of rgenoud solutions
Dear All
I am using rgenoud to solve the following maximization problem:
myfunc <- function(x) {
x1 <- x[1]
x2 <- x[2]
if (x1^2+x2^2 > 1)
return(-9999999)
else x1+x2
}
genoud(myfunc, nvars=2,
Domains=rbind(c(0,1),c(0,1)),max=TRUE,boundary.enforcement=2,solution.tolerance=0.000001)
How can one increase the precision of the solution
$par
[1] 0.7072442 0.7069694
?
I
2010 Apr 18
2
Problem with RGenoud
I've been using RGenoud for a while and it worked smoothly so far. However I
came across a strange problem lately (for me at least...).
It fails after the first individual and I get the following error message
when I set MemoryMatrix = FALSE :
Error in genoud(fn, nvars = 8, max = TRUE, pop.size = 10, :
REAL() can only be applied to a 'numeric', not a 'character'
when I
2005 Mar 02
1
Rounding parameter values in genoud(), Rgenoud package
I would like to limit the significant figures of the calibrated
parameters determined by genoud() in the Rgenoud package. Below is some
example output, where column 1 is model run number, columns 2-7 are the
parameter values, and columns 8-12 are model fit statistics. I would
like genoud to internally limit parameters to 4 decimal places as shown
in this output. It is clear that the function is
2011 Jan 13
1
setting up a genoud run
Hello - and sorry for a possibly stupid question, I'm just starting to
learn rgenoud.
I am defining a function with 5 parameters (p1, p2, p3, p4a, and p4b)
and then want to optimize it using genoud. But I am doing something
wrong.
Before genoud is even able to run it says: "Error in p2 + 1.2 : 'p2'
is missing".
I assume I did not specify it right. My code is below.
The task
2011 Jun 11
1
Amazon AWS, RGenoud, Parallel Computing
Dear R group,
since I do only have a moderately fast MacBook and I would like to get
my results faster than within 72h per run ( :-((( ), I tried Amazon
AWS, which offers pretty fast computers via remote access. I don't
want to post any code because its several hundreds lines of code, I am
not looking for the "optimal" answer, but maybe some suggestions from
you if faced similar
2007 Sep 01
1
genoud problem
Hi R users,
"genoud" function of "rgenoud" package will optimize my function. If
opt = genoud(fn,2,max=TRUE,starting.value=c(1,10),........)
opt$value will give the optimized value of the function, "fn". My
problem is from the same opt, can I get the value of the function at the
initial parameter values? I need the initial value of the function for
2006 Feb 14
1
Parallel computing in R for dummies--how to optimize an external model?
I am trying to use the optimizing function genoud() with the snow
package on a couple of i686 machines running Redhat Linux WS4 . I don't
know anything about PVM or MPI, so I just followed the directions in
snow and rgenoud for the simplest method and started a socket cluster.
My function fn for genoud involves updating an input file for a separate
numerical model with the latest parameter
2011 Feb 03
1
rgenoud for multiple chips: does a more recent special version of "snow" exist?
Dear everyone,
I am trying to run rgenoud on several chips simultaneusly. I used the
instructions provided on Jasjeet Sekhon's Homepage
(http://sekhon.berkeley.edu/rgenoud/multiple_cpus.html).
However, I have the newer version of R (R 2.12) installed - for a
64-bit machine. So, when I tried to install the special version of
"snow" from a zip file provided by Jasjeet on his page, R
2008 May 14
0
Parallel computing with rgenoud and snow: external file I/O possible?
I am trying to use rgenoud and snow with an external model and file I/O.
Unlike the typical application of rgenoud and snow, I need to run an
external executable and do pre- and post-processing of input and output
files for each parameter set generated by genoud(). I'm hoping that
someone can suggest improvements to my approach and a work-around for
file I/O problems I've encountered when
2011 Jul 01
2
SNOW libraries/functions, rGenoud
Dear group,
does anybody know how to export libraries/functions to all nodes when
launching snow? I want to use a function from fBasics (dstable) for a
rGenoud optimization routine, but I fail "making the function
accessible" to the nodes created. I know how it works for variables, I
know how it works in snowfall(which cant be used in that case), but I
dont know how it culd work in
2012 Oct 16
2
Windows 7 R (32/64bit) running under cygwin: package not found
Hi,
Using R 2.15.1 on Windows 7. Have installed both versions 32 and 64bit.
In both of them among others I have installed a package rgenoud
When I open R gui of 32bit and write library(rgenoud) it responds by
showing a functional rgenoud version 5.7-8. The same it does on Rgui
64bit.
Now I am working in cygwin (v. 1.12.4.0) with xwin. Normally before when
I had installed a package, I only had
2007 Mar 21
1
Problem installing packages in R 2.4.1
I am attempting to install a anchoring vingettes package for R and I seem to
have a problem with unzipping the files in R. I use the command that can be
found here <http://wand.stanford.edu/anchors/>.
Here is the dialog I get after entering the command:
> install.packages("anchors", dependencies = TRUE,
+
2006 Apr 20
1
Parallel computing with the snow package: external file I/O possible?
Hello,
After getting help to solve part of my problem and some delay on my
part, I am posting a more refined version to see if someone can help me
further. I am trying to autocalibrate a model in my subject area using
the snow and rgenoud packages. I want to use the key function "fn" that
is called by genoud() to finalize input, run the model executable, and
compute the objective
2007 Jun 28
0
new package benchden 1.0.0 : benchmark densities for nonparametric density estimation
The new package "benchden" 1.0.0 implements 28 benchmark densities for
nonparametric density estimation that were introduced by A. Berlinet and
L. Devroye ("A Comparison of Kernel Density Estimates", Pub. Inst. Stat.
Univ. Paris, XXXVIII, fasc. 3, 1994, 3-59,
http://cg.scs.carleton.ca/~luc/devs.html ). This collection includes a
variety of densities with different degrees of
2007 Jun 28
0
new package benchden 1.0.0 : benchmark densities for nonparametric density estimation
The new package "benchden" 1.0.0 implements 28 benchmark densities for
nonparametric density estimation that were introduced by A. Berlinet and
L. Devroye ("A Comparison of Kernel Density Estimates", Pub. Inst. Stat.
Univ. Paris, XXXVIII, fasc. 3, 1994, 3-59,
http://cg.scs.carleton.ca/~luc/devs.html ). This collection includes a
variety of densities with different degrees of
2005 May 03
0
R on Mac OS X: odd errors when doing install.packages()
Should I be worried? The installation seems to go through fine and
apparently nothing is broken. The errors I repeatedly get are like this:
g++ -no-cpp-precomp -I/Library/Frameworks/R.framework/Resources/include -I/usr/
local/include -DUNIX -DOPTIM -DNONR -fno-common -g -O2 -c unif.cpp -o unif.o
g++ -bundle -flat_namespace -undefined suppress -L/usr/local/lib -o rgenoud.so c
hange_order.o
2020 Sep 01
1
Dovecot Proxy
Hi Philon,
now, it's time for "Mahlzeit" ;-)
Sorry, that I read the wiki1 instead of wiki2. I thought the 1 means
that it is server one of ... my fault. Also not reading the first line
above the menu. My focus was really on the content. ;-)
Also my problem with the doc of Dovecot2 proxy is, that the document
https://doc.dovecot.org/configuration_manual/authentication/proxies/
2007 Aug 16
0
Help with optimization using GENOUD
Dear Friends,
I have been trying to learn how to use the derivative free optimization algorithms implemented in the package RGENOUD by Mebane and Sekhon. However, it does not seem to work for reasons best described as my total ignorance. If anybody has experience using this package, it would be really helpful if you can point out where I'm making a mistake.
Thanks in advance
Anup
Sample
2013 Oct 24
4
Restrict access to users home drives
Hi,
is it possible to hide/restrict access to the home drives of our samba
users when accessing them directly via netbios address?
I have set up the home folders in ADUC. They are all mapped to drive H:
and users have full access to their drive. The problem is, that others
users also have access (accept write) to other users folders when
opening the domain shares via
\\<netbios