similar to: analytical solution of partial differential equation

Displaying 20 results from an estimated 2000 matches similar to: "analytical solution of partial differential equation"

2011 Feb 11
6
linear models with factors
i am trying to fit a linear model with both continuous covariates and factors. When fitted with the intercept term the first level of the factor is treated by R as intercept and the estimate of the effects of remaining levels(say i th level) are given as true estimate of i th level - estimate of 1st level.can any please help me? thanks in advance..... -- View this message in context:
2011 Oct 20
4
quantmod package
i am new to the quantmod package . so if the answer is trivial please excuse me. i want to study stock values within a day. i get current stock updates using getQuotes and then want to produce usual quantmod graphs with that values. also the graph should be able of adding technical indicators. please help. in addition it will be helpful if anyone suggests how to run that code continuously to get
2011 Jan 02
3
changing method of estimation in GLM
can anyone tell me how can i control the method of estimation (i.e. scoring method or Newton raphson method) in glm and compute deviance function ? -- View this message in context: http://r.789695.n4.nabble.com/changing-method-of-estimation-in-GLM-tp3170836p3170836.html Sent from the R help mailing list archive at Nabble.com.
2012 Dec 03
2
Solving a multinomial gompertz partial differential equation in r
I haven't used r in quite a while but would like to get back into it. I have a problem that I would like to solve with r. I have some multinomial data that looks to follow an asymmetric sigmoidal growth pattern. Solving a multinomial gompertz partial differential equation in r is what I’m after. Would anyone be able to provide me the code and packages to do something like this? Regards,
2017 Dec 19
1
Partial differential equation
Hello, I am having troubles with heat conduction problem. Below is the given information. Should I move forward with this problem like any other 1-D PDE? ?T/?t = a* (?^2T/?x^2) I.C. For t = 0 and 0 ? x ? 10, T = 0 ?C B.C. For x = 0 cm and all t , T = 100?C For x = 10 cm and all t , T = 0 ?C The thermal diffusivity is a = 2.0 cm^2 /s. I also added what I have for code in R. Any help will
2011 Oct 18
1
problem with quantmod package
i am using quantmod package.it get stock quotes from google finanace. but unfortunately i am not able to get the quotations of some stocks(e.g. NSE:TCS,NSE:SAIL ) through the "getSymbol" command of this package although they are available in the google finance website. anyone please help me. thanks in advance..... -- View this message in context:
2005 May 21
1
Numerical PDE Solver
Is there a package in R which implements numerically solves pde ? Thanks, Tolga
2013 Nov 29
2
Fixing nouveau for >4k PAGE_SIZE
On Thu, 2013-08-29 at 16:49 +1000, Ben Skeggs wrote: > > Additionally the current code is broken in that the upper layer in > > vm/base.c doesn't increment "pte" by the right amount. > > > > Now, if those two assertions can be made always true: > > > > - Those two functions (map_sg and map_sg_table) never deal with the > > "big"
2013 Aug 11
2
Fixing nouveau for >4k PAGE_SIZE
Hi folks ! So I've been trying to figure out what it would take to make nouveau work properly on architectures where PAGE_SIZE isn't 4k such as most ppc64's. An initial patch from Dave fixed a bogon in nv41.c nv41_vm_map_sg() which was trying to handle the case at that low level, but this isn't enough, and after a bit of digging, I also think that's not the right approach:
2012 Nov 27
3
Problem installing knitr 0.5 or higher in Ubuntu
Hi, I am using Rstudio in Ubuntu . While installing R from the terminal I got the version R 2.13.1 . But the problem is that knitr 0.5 requires higher versions. So is there any way to get the latest version of R in ubuntu (or 2.13.1 is the maximum I can get)? In case the higher R version is not available can anybody please help me how do I use the "knitr Html" option in R studio.
2004 Jul 09
3
analytic solution for equation
Hello, I have search on R website but do not find any solution. I would like to know if R has some functionalities to produce analytical results of equation. or more generally if it contains some functions to simplify equation. For example: I would like to obtain x1 from: x1+x2=8 (x1=8-x2) x1^2+x2=8 (x1=sqrt(8-x2)) Is is possible in R ? if not, do you know a (free) software that could do the
2002 Apr 17
4
rsync HELP!!!
Sonu: I'm giving the whole history to the rsync list. If the tests i subscribed passed, yet you get that error, it's more in depth than i can go into. You've got 1 hour, let's hope somebody immediately recognizes the problem. I've got some ideas, but no time to explore any more for you. Gentlemen: does anybody see a quick resolution for Sonu? Looks like he's
2012 Feb 14
3
configure lyx2.0.2 with sweave in windows 32 bit.
I am using R 2.14.1. I am trying to configure Lyx with Sweave. I have read articles but I found none to be complete and I cannot import sweave document in lyx . Can anyone please help me with a stepwise procedure how to configure Lyx with Sweave so that I can run my R-code chunks from LYX ,the output being a pdf.? Thanks in advance. -Atanu -- View this message in context:
2013 Aug 11
2
Fixing nouveau for >4k PAGE_SIZE
On Sun, 2013-08-11 at 11:02 +0200, Maarten Lankhorst wrote: > > diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nv40.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nv40.c > > index 5c7433d..c314a5f 100644 > > --- a/drivers/gpu/drm/nouveau/core/engine/fifo/nv40.c > > +++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nv40.c > > @@ -190,8 +190,8 @@
2007 Dec 12
5
bgp require in multigateway routing
hi all, first i wann to explain my network & it''s problem, i am using a redhat el5 for multigateway routing, i have 3 adsl lines which is connected with eth0, eth2 and eth3. eth1 is my local network. those 3 lines comes with adsl modem from same isp with equal bandwidth (512 Kbps). In this adsl modems there is one lan and one wan port, adsl modem''s lan ip is gateway for my
2013 Aug 11
2
Fixing nouveau for >4k PAGE_SIZE
Op 11-08-13 07:36, Benjamin Herrenschmidt schreef: > On Sun, 2013-08-11 at 10:41 +1000, Benjamin Herrenschmidt wrote: >> Now, to do that, I need a better understanding of the various things >> in there since I'm not familiar with nouveau at all. What I think I've >> figured out is with a few questions, it would be awesome if you could >> answer them so I can have
2007 Sep 22
2
A weird observation from using read.table
Hi Everyone, Recently I got puzzled by the function read.table, even though I have used it for a long time. I have such a file (tmp.txt, 2 rows and 3 columns, with a space among columns): 1 2'-PDE 4 2 3'-PDE 5 if I do: a = read.table("tmp.txt", header = F, quote = "") a V1 V2 V3 1 1 2'-PDE 4 2 2 3'-PDE 5 Everything is fine. However, if I do: a
2005 Jun 23
2
solving equation system
Hello, I want to solve some two dimensional equation system with R. Some systems are not solvable analytically. Here is an example: (I) 1/n*sum{from_i=1_to_n}(Xi) = ln lambda + digamma(c) (II) mean(X) = x / lambda I want to find lambda and c, which R-function could do that task? Carsten [[alternative HTML version deleted]]
2007 Mar 13
1
Solving PDEs
Hi, Is there any method in R by which I can solve PDEs? Thank you, Amit [[alternative HTML version deleted]]
2006 Sep 27
1
PDE
Dear all, Does any know how to solve PDE with R? The archive list refers to the use of ODE if PDE are parabolic. I am not a mathematician and this does not mean anything for me! help would be very appreciated. Many thanks -- ___________________________________________________ Christophe NGUYEN UMR 1220 INRA-ENITAB Transfert sol-plante et cycle des ?l?ments min?raux dans les ?cosyst?mes