similar to: fit simple surface to 2d data?

Hi, I've got a matrix, Z, of values representing (as it happens) optical power at each pixel location. Since I know in advance I've got a single, convex peak, I would like to do a 2D parabolic fit of the form Z = poly((x+y),2) where x and y are the x,y coordinates of each pixel (or equivalently, the row, column numbers). Is there an R function that lets me easily implement that?

Dear all, I need your advice since I am looking for an implementation of the parabolic cylinder function in R. I found implemantations of the hypergemetric functions (the Whittaker and the confluent hypogeometric functions) in the package fAsianOptions but the parabolic cylinder function was unfortunately not there. Do you know of such implementation? Thank you very much for your advice.

Dear R users and experts, I want to fit a shifted parabolic function with the following functional form to my data: f(x)=a0*(x+a1)^2+a2 (a0, a1 and a2 are scaling factors.) What is standard approach to do this in R? I tried the "lm" function in R but I got problems getting the above functional form. Any help is welcome :) . Greetings, Henri

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

Quoting asterisk-users-request@lists.digium.com: > > Would it be considered trolling to start a thread on Cleaning Maple > > Syrup off of Dial Pads, or Wiring your Moose for Wi-Fi? > > Let's not forget the weekly "tooques and telephony" segment, and a > review of > the best block heaters for your wi-fi fones. > Oh, we're gonna have a good time next

Rers: I have some ecological data (stream velocity vs. % cover of submerged weeds) that shows strong evidence of a thresholding step-function, e.g. below some velocity, % cover ranges from 0% to 100% (with no apparent relationship to velocity within this range of velocities), but above a certain "threshold" velocity, the % cover does not appear to exceed, say, 10%. There are good

To the openssh community; I have installed openssh 6.2 on my mac book pro and tried to ssh to a server and the ssh session hangs. The host server shows that a connection was established but I cannot return a prompt to indicate that I am connected to the server. Can someone advise? Thanks in advance ======>HOST SERVER [ALLOC133 /export/home/tinker] netstat -a |grep msp9022.XX.XXX.COM.ssh

Dear List: I have a data frame prepared in the couting process style for including a binary time-dependent covariate. The first few rows look like this. PtNo Start End Status Imp 1 1 0 608.0 0 0 2 2 0 513.0 0 0 3 2 513 887.0 0 1 4 3 0 57.0 0 0 5 3 57 604.0 0 1 6 4 0 150.0 1 0 The outcome

On Mon, Jun 12, 2017 at 01:53:40PM +0100, Rowland Penny via samba wrote: > Try running 'samba-tool testparm' and fix any errors it flags up. Is "samba-tool' a ubuntu Samba thing? With Fedora Samba versions 3.5 and 4.5, it does not exist. The 'testparm' most certainly does and I agree with using it. I just recently set up my new Fedora 25 box and used it after

On Mon, Jun 12, 2017 at 01:53:10PM +1200, Andrew Bartlett via samba wrote: > On Sun, 2017-06-11 at 20:08 -0500, Mike Brown via samba wrote: > > Yes, I know, XP-SP3 is very old.????It works for what I need it for.????I > > have > > some programs that will never be updated for Win 7. > > > > Note that XP-SP3 and Fedora 14 work together just fine, so I'm >

Yes, I know, XP-SP3 is very old. It works for what I need it for. I have some programs that will never be updated for Win 7. Note that XP-SP3 and Fedora 14 work together just fine, so I'm guessing that a newer version of Samba is what is keeping me from logging in from XP. But, I do not know what to put in the smb.conf file to allow XP to mount a share. Here is the output from testparm:

On Mon, Jun 12, 2017 at 09:51:53AM +0200, Reindl Harald via samba wrote: > Am 12.06.2017 um 09:41 schrieb Mike Brown via samba: >> On Mon, Jun 12, 2017 at 09:28:20AM +0200, Reindl Harald via samba wrote: >>> Am 12.06.2017 um 09:03 schrieb Mike Brown via samba: >>>> On Mon, Jun 12, 2017 at 01:53:10PM +1200, Andrew Bartlett via samba wrote: >>>>> On Sun,

On Mon, Jun 12, 2017 at 09:28:20AM +0200, Reindl Harald via samba wrote: > Am 12.06.2017 um 09:03 schrieb Mike Brown via samba: >> On Mon, Jun 12, 2017 at 01:53:10PM +1200, Andrew Bartlett via samba wrote: >>> On Sun, 2017-06-11 at 20:08 -0500, Mike Brown via samba wrote: >>>> Yes, I know, XP-SP3 is very old.????It works for what I need it for.????I >>>>

Sorry, For me a vector is a matrix with mx1 dimmensions. But it is true that it is not the way I correctly must talk in R. Can you guide me in what I?m trying to do? I?m trying to find what I want in Excel using something like a parabolic function but dind?t get yet (then to try to replicate in R). 2017-06-02 7:01 GMT+02:00 Bert Gunter <bgunter.4567 at gmail.com>: > Bert Gunter >

Hi, I'm using R to find esplicit functions fitting set of data. The data contains about 30 points, which have different weights (number of cases represented from the point). I plot the points, choose "by eye" a function made with exp or arctg or polinomial and use nlm to minimaze the root mean error with correct the weights. For Example: Err <- function(p) sum((weight*(y

trying to start Sherlock Holmes: The Awakened v1.0. Ubuntu 10.10 wine-1.3.15. It's being start and get a window: By the first start you must have administrator privilege. Something like this. What does it mean? I mean, that I knew what it mean, :) but how can I fix it?

Alternatively, just type debug(optim) before using it, then step through it by hitting enter repeatedly... When you're done, do undebug(optim). Andy > From: Spencer Graves > > Have you looked at the code for "optim"? If you > execute "optim", it > will list the code. You can copy that into a script file and walk > through it line by line to

Hi, everyone I am trying to estimate 3 parameters for my survival function. It's very complicated. The negative loglikelihood function is: l<- function(m1,m2,b) -sum( d*( log(m1) + log(m2) + log(1- exp(-(b + m2)*t)) ) + (m1/b - d)*log(m2 + b*exp(-(b + m2)*t) ) + m1*t - m1/b*log(b+m2) ) here d and t are given, "sum" means sum over these two vairables. the parameters

On Jun 15, 2016, at 9:44 AM, Tanstaafl <tanstaafl at libertytrek.org> wrote: > On 6/14/2016 6:50 PM, @lbutlr <kremels at kreme.com> wrote: >> Where exactly does dovecot get the date that it reports via IMAP? > > This is a problem with how you restored the files. > > On a linux system, you should use something like rsync -a to preserve > the original

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]]