Displaying 20 results from an estimated 3000 matches similar to: "Run fortran from R"
2007 Jul 10
2
integration over a simplex
Hello
The excellent adapt package integrates over multi-dimensional
hypercubes.
I want to integrate over a multidimensional simplex. Has anyone
implemented such a thing in R?
I can transform an n-simplex to a hyperrectangle
but the Jacobian is a rapidly-varying (and very lopsided)
function and this is making adapt() slow.
[
A \dfn{simplex} is an n-dimensional analogue of a triangle or
2002 Nov 22
1
simplex problem (PR#2317)
Full_Name: George F. LeCompte
Version: 1.6.1
OS: Windows 98
Submission from: (NULL) (208.8.162.161)
This may be a newbie problem. I am attempting tor unt the simplex routine from
the boot package. The example code doesn't find simplex. What's wrong here?
> help(simplex,package=boot)
> # from the resulting article
>
> # This example is taken from Exercise 7.5 of
2004 Jan 14
4
re hardware requirement - asterisk
I have just checked the Openbsd box on the if interface.
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
address: 00:02:55:30:54:28
media: Ethernet autoselect (100baseTX full-duplex)
status: active
inet 192.168.1.1 netmask 0xffffff00 broadcast 192.168.1.255
inet6 fe80::202:55ff:fe30:5428%fxp0 prefixlen 64 scopeid 0x1
xl0:
2009 Dec 08
1
Simplex Density Plots
Hello,
I have just started using R, and have found it quite easy to make
plots of probability densities for normal and beta distributions, etc.
Now, I'm looking at trying to make a simplex plot of a Dirichlet
density, but have gotten stuck and was hoping that someone could help.
Ideally, the plot would look something like the 3d plots on Wikipedia here:
2009 Jun 19
2
Manipulate solution of simplex
Hi,
I need some help. I'm doing a project that demands me to obtain several
simplex solutions and I would like to can keep the solution in a vector or
something to be able to use it after I get it.
The comand simplex() prints the solution but how can I keep it?
Another alternative would be to export it to excel, how can I do this?
I just see the solution and have to note it on a paper or
2008 Dec 11
2
Simplex function in R
I have a set of linear equations and would like to find any feasible solution. A simplex solution works in Case 1 below, but not in Case 2. I would be grateful for any help.
Case 1: Find any feasible solution for the set of linear equations:
a + b + c = 5
a + b + 0c = 4
0a + b + c = 4
Solution - a feasible (and unique) solution is a=1, b=3, c=1.
The following R code
2004 Jan 15
2
re: hardware requirement asterisk
This is ifconfig on openbsd box:
fxp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
I think this output shows that the fxp0 interface is on simplex mode.
The voice degradation I referred was by using xlite soft phone. I open 2
line similtaneously and dial to FWD and back to my incoming extension.
Xlite is runnning on a w2k box with realtek 100M nic in auto mode. I can
2008 May 28
3
7-STABLE: bridge and em
Hello list!
When em0 has an inet address while bridge0 doesn't, it seems to be OK:
-----
bs1% uname -a
FreeBSD bs1.sp34.ru 7.0-STABLE FreeBSD 7.0-STABLE #0: Sun May 25 20:15:26 MSD 2008 root@bs1.sp34.ru:/usr/obj/usr/src/sys/BSM i386
bs1% ifconfig em0; ifconfig tap0; ifconfig bridge0
em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
2009 Oct 10
2
Nelder-Mead with output of simplex vertices
Greetings!
I want to follow the evolution of a Nelder-Mead function
minimisation (a function of 2 variables). Hence each simplex
will have 3 vertices.
Therefore I would like to have a function which can output
the coordinates of the 3 vertices after each new simplex
is generated. However, there seems to be no way (which I can
detect) of extracting this information from optim() (the
2003 Oct 11
1
Simplex "Out of Bounds" Error
I am running the following code (testing the use of the simplex function to
determine if a point is in the convex hull of another set of points or not):
>a <- c(0, 0)
>A3 <-matrix(c(1,2,3,4,1,1), ncol = 2, byrow = T)
>b3 <-c(1.5, 3.5, 1)
>simplex(a = a, A3 = A3, b3 = b3)
and the following error message appears:
Error in simplex1(out1$a[1:(n + m1 + m2)], out1$A[, 1:(n + m1
2005 Mar 11
1
Simplex(boot) returning invalid answer
In trying to use simplex() from the boot package, I have run into a
situation that doesn't seem like it should be possible. It is claiming
that it has solved the LP, but returns a vector of all zeros, which
does not satisfy the constraints I passed in. A small example:
> ubMatrix <- matrix(c(1,1,-1,0,-1,-1), 3, 2)
> ubVector <- c(2,1,-1)
> objective <- c(0,1)
>
2007 Nov 30
1
simplex projection and S-Map
I am interested in using the nonlinear forecasting techniques developed
by Sugihara et al. In particular the simplex projection and the S-Map
(see this website for details and reprints: http://iod.ucsd.edu/simplex/ ).
I've looked through CRAN but could not find any package with functions
that allow such analysis.
Any pointers?
Thanks,
Manu
2003 Jun 30
1
Fw: VPN setup problem - proxy arp I think
Hi all,
I read the setup at http://www.blackh0le.net/articles/vpn-dun-howto.html to setup my VPN.
However, I'm having a problem which I think is proxy-ARP not working. I like to ask you to see if you know what's going on. When I ping 10.77.1.1 from windows XP machine the packets get to the 10.77.1.1 machine, but they don't have a return path to get back. When I do ping the windows
2001 Oct 03
1
tiny typo in optim/N-M documentation (PR#1109)
In the optim() documentation, the control parameter "maxit" says
"There is no other stopping criteria." That should be "are", or
"criterion" ...
While I'm at it -- poking at the code a little bit, it looks as if the
initial simplex is set from the initial point by displacing each
parameter value by max(0.1,0.1*pmax(fabs(Bvec))), where Bvec is the
2004 Jan 15
2
re: hardware requirement -asterisk
Referring to my previous post about degradation of voice quality when
having more than 2 connection.
The actual route is:
pc xlite -> local asterisk box -> iaxtel -> local asterisk
I have tried out a different situation:
pc xlite -> local asterisk box -> iaxtel
and the second connection
pc xlite -> local asterisk box -> iaxtel -> local asterisk
The same degradation
2003 Apr 02
1
n.iter in simplex()
Dear R users,
Is anyone familiar with the "n.iter" argument of the simplex() function
(in the boot package)? It seems it doesn't have an effect no matter what
value I set it ...
I'm trying to solve a linear programming problem and running into the
problem of
simplex.object$solved = 0
or
"A value of 0 indicates that the maximum number of iterations was reached
without
2002 Sep 25
1
rbind(NULL,NULL) and simplex()
Hello everybody.
I found out the other day something quite astonishing (which I guess
is not astonishing at all to those in the know): in d-dimensional
space, determining whether a given point is inside the convex hull of
a set of n points is elegantly and quickly solvable using linear
programming.
If the columns of matrix "ff" are the coordinates of the set of
points, then in d=2
2009 Apr 25
1
FreeBSD-7.1 wi-driver error messages
I have FreeBSD 7.1-RELEASE-p4 running on a Soekris 4521 with three
wireless cards that use the wi-driver:
- one mini-pci wireless card:
<Intersil Prism2.5> on pci0
using RF:PRISM2.5
MAC:ISL3874A(Mini-PCI)
Intersil Firmware: Primary (1.1.1), Station (1.8.2)
- and two pcmcia wireless cards:
2003 Sep 15
5
strange problem with: ed driver / 4.9-PRE
Hi,
in the kernel I have these lines:
[...]
device miibus # MII bus support
device rl
device ed
options IPFIREWALL #firewall
options IPFIREWALL_VERBOSE #enable logging to syslogd(8)
options IPFIREWALL_VERBOSE_LIMIT=0 #limit verbosity
options IPDIVERT #divert sockets
options DUMMYNET
2005 Jul 14
2
[ronvdaal@zarathustra.linux666.com: Possible security issue with FreeBSD 5.4 jailing and BPF]
This message was sent to bugtraq today:
While playing around with FreeBSD 5.4 and jailing I discovered that it was
possible to put an ethernet interface into promiscious mode from within the
jailed environment, allowing a packetsniffer to gather data not meant for
the jailed box. This also affects FreeBSD 5.3 (tested) but not FreeBSD 4.x
This can be reproduced on boxes where BPF support is