search for: diffusion

Displaying 20 results from an estimated 367 matches for "diffusion".

2007 Aug 14
3
diffusing GIS data in maps
...inbow(length(geocode$VALUE), start=0, end=.4)[rank(geocode$VALUE)]) This gives me a map of Europe with my datapoints highlighted in two ways: magnitude is represented by the size of the point, and value is represented by the color. However, what I would really like is for there to be some sort of diffusion, such that instead of discrete points, the European map is covered in color so I can see more clearly whether there are regional patterns (something that will presumably look like this contour chart: <http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=20> only on the European map)...
2009 Oct 22
2
Diffusion of particles inside a sphere
Hello veryone, I am interested in the diffusion of particles inside a sphere, and its release through a small pore on the sphere surface. Unfortunately, I have not found the way to do this in R. Could you help me? Thank very much in advance for your help
2008 Apr 02
0
[R-SIG-Finance] Bayesian estimation of jump-diffusion processes andself-exciting counting processes
...g-finance-bounces at stat.math.ethz.ch <r-sig-finance-bounces at stat.math.ethz.ch> To: r-help <R-help at stat.math.ethz.ch>; r-sig-finance at stat.math.ethz.ch <r-sig-finance at stat.math.ethz.ch> Sent: Wed Apr 02 06:49:54 2008 Subject: [R-SIG-Finance] Bayesian estimation of jump-diffusion processes andself-exciting counting processes Hi all, Could anybody give me some pointers to estimation of jump-diffusion and self-exciting processes(or more generally, counting processes with stochastic intensity, such as doubly stochastic processes, Cox processes, Hawkes processes) using the Ba...
2006 Nov 05
2
Generating a double-exponential jump diffusion process
Dear R Users, Does anyone know of a package which can generate random realisations of a double-exponential jump diffusion process with a drift ? Something where I can specify the likelihoods of an up or a down jump, the drift rate, and the mean size, and get back a vector of realisation of the process (for purposes of a Monte-Carlo). Kind regards, Tolga
2019 Nov 15
2
Commit history duplicated, seeing weird diffusion activity (Was: [Diffusion] rG67c416dc9a5a: [DebugInfo] Allow spill slots in call site parameter descriptions)
I just got a Diffusion notification about a change of mine being reverted by Fangrui, but I'm not sure that's actually what happened and am confused and concerned. My commit was "[DebugInfo] Allow spill slots in call site parameter descriptions", and it appears in the history under two hashes: 1ee84e a...
2020 Mar 02
0
Postulation à la liste de diffusion
Bonjour, j'ai l'honneur de vous informer que je postule ? la liste de diffusion pour des fins utiles de cette formation "MOOC". Salutations ? toute l'?quipe d'encadrement. Cordialement. -- *DOUMBOUYA Moussa* *Epid?miologiste bio statisticien* ************************** Certifi? en FETP premi?re ligne en Guin?e *Chef de section pr?vention et lutte contr...
2006 Jul 06
0
blur/diffuse option
is it possible to make the "decorator" plugin have a blur/diffuse option, like in vista's transparent deco's. Would be cool to mimic vista's gui with compiz :)
2007 Dec 09
3
Oriented object programming
Hi all Two questions: - I would like to learn more on oriented object programming with R. Is there any tutorial for that? - Without waking up a troll, I am not very familiar with diffusion list, I am more use to forum. On a diffusion list, how can I check if someone already asks a question? I mean, I went on CRAN-R website, I find the R mailing list archive. But is there a way to search some key word like "object programming"? Thanks for your help Christophe
2010 Apr 26
1
finite difference scheme for 2D differential equations
Hello everyone, I am trying to solve 2D differential equations using finite difference scheme in R. I have been able to work with the equations with only one spatial dimensions but I want to extend it to the two dimensional problem. For example i can simulate one dimensional diffusion using a code like the following. But I want to write a similar code for,say, a two dimensional diffusion equation. Any kind of help/advice is highly appreciated. Here is how I did for the 1D equation (in this case for 1D diffusion) Equation: dc/dt = D*d^2c/dx^2 dx = 10 dt = 0.1 D = 15 n = 20 ts...
2017 Sep 25
0
SVN revisions no longer visible through diffusion
~3 hours ago, I got a big pile of emails from Phab that I had been expecting over the last 3 days, so I think that means it's working now. :) On Mon, Sep 25, 2017 at 9:32 AM, Reid Kleckner <rnk at google.com> wrote: > Looks fixed now? Something is leaking files in /tmp on the VM, leading to > mysql disk full errors. I deleted files in /tmp, but of course this is a > temporary
2007 Mar 01
0
blocking name diffusion within two subnets
Hello I administrate a samba server with two network cards. This server is visible and serve his shares succesfully on two differents subnets. Ports 137,138 & 139 (both tcp & upd) are filtered between those two subnets by cisco switches. The problem is that all my computers on the first subnet are visible from the second subnet in the network neigbourhood. Only their names are
2017 Sep 23
0
SVN revisions no longer visible through diffusion
This was in the email I got for r314024 before things went dark: STDERR svn: E000028: Can't write to file '/tmp/svn-Hgr6yM': No space left on device On Sat, Sep 23, 2017 at 3:59 AM, Nemanja Ivanovic via llvm-dev < llvm-dev at lists.llvm.org> wrote: > Revision https://reviews.llvm.org/rL314025 works. > Revision https://reviews.llvm.org/rL314026 does not (404 Not
2017 Sep 23
2
SVN revisions no longer visible through diffusion
Revision https://reviews.llvm.org/rL314025 works. Revision https://reviews.llvm.org/rL314026 does not (404 Not Found). At the time of this mailing, the top of trunk is at 314060. Is this some kind of known problem with Phabricator recently? -------------- next part -------------- An HTML attachment was scrubbed... URL:
2016 May 05
4
[RFC] Helping release management
Filing a PR for *every* fix is overkill. But filing a PR to express "please merge this to the branch" (if there isn't already a PR) seems reasonable. --paulr From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of Reid Kleckner via llvm-dev Sent: Thursday, May 05, 2016 10:09 AM To: Quentin Colombet Cc: llvm-dev Subject: Re: [llvm-dev] [RFC] Helping release
2010 Sep 09
1
rgl and lighting
Dear R community (and Duncan more specifically), I can't work out how to make additional light sources work in rgl. Here is the example. First I create a cube and visualize it: > cubo <- cube3d(col="black") > shade3d(cubo) Next I position the viewpoint at theta=0 and phi=30: > view3d(theta=0,phi=30) Next, I want to create a 2nd light source which diffuses red light
2017 Sep 25
2
SVN revisions no longer visible through diffusion
Looks fixed now? Something is leaking files in /tmp on the VM, leading to mysql disk full errors. I deleted files in /tmp, but of course this is a temporary fix. Eventually it will fill up again. =/ On Sat, Sep 23, 2017 at 7:18 AM, Sanjay Patel via llvm-dev < llvm-dev at lists.llvm.org> wrote: > This was in the email I got for r314024 before things went dark: > > STDERR > svn:
2012 May 11
0
Interpreting summary of lme
Dear mixed-modelers, I have built a mixed model and I'm having serious trouble with interpreting the output. I want to test differences in the coefficient of variation (CV) of light across 3 tree crown exposures (Depth). I have measured direct and diffuse radiation (RF) and I want to test for differences for each kind of radiation between crown exposures, as well as differences between
2016 May 17
3
[RFC] Helping release management
...ces that we > should remind to the contributors. > For #1, I propose the attached patch for the commit message policy. > > > * What Is Next? * > > Now, moving forward, we should investigate if it is possible to have: > A. Hooks on commit to automatically update some field in Diffusion/Bugzilla > when a fix is committed. > B. PRs automatically created for fixes that do not have a PR. > > For A, the idea is to have an automatic way to update the PRs (like resolved > and fixed with a revision number) when some keywords are set (like fixes > PR#). The idea with Dif...
2011 Sep 23
0
Error message when using 'optim' for numerical maximum likelihood
...pplied an extract of my code below for inspection (note that I am fairly new to programming so my code is probably not the most efficient/elegant...). Thank you in advance, Steven # I use a Milstein scheme to generate a simulation of the SDE I am trying to estimate Mil.sim <- function(X0,drift,diffusion,diffusion.x,horizon,no.steps) { set.seed(123) X <- rep(NA,no.steps+1) # initialise vector to store sample X[1] <- X0 shocks <- rnorm(no.steps) # generate normal shocks for FEM method step.size <- horizon/no.steps # define step size to use in simulation...
2009 Jan 23
2
R for Computational Neuroscience?
Hi all, I've noticed that many computational neuroscience research groups use MATLAB. While it's possible that MATLAB may have some features unavailable in R, I suspect that this may instead simply be a case of costly tradition, where researchers were taught MATLAB as students and pay for it as researchers because it's all they know. I'd like to attempt to break the cycle by