search for: balakrishnan

Dear Sirs, I am a new user of the R package. When I try to use the curve function it confuses me. > curve(x^2) Works fine. > curve(x) Makes a complaint I don't understand. Why is x^2 valid and x is not? I check the documentation of curve, and it says the first argument must be an expression containing x. > expression(x) Is an expression containing x. > curve(expression(x))

...uspect that this stuff is easy enough to do ab initio that people don't bother to fire up a literature search. I don't see why that page doesn't cite: https://en.wikipedia.org/wiki/Unbiased_estimation_of_standard_deviation ... which had several citations including to Johnson, Kotz and Balakrishnan, v 1, ch 13 sect 8.2. I dug out my copy from the bottom of a large pile of tomes that I had not reshelved and can confirm that the formula is almost (but not quite) the same as appears in print. JK&M give a formula (p 127) with no derivation or citation: E[S] = sigma*( 2/n )^(1/2)*Gamma(n/2)/...

Hello, I am currently using CentOS 7 and for the last two days GUI is not working in my computer and the operating system is not starting. Black Screen lists something like in Red Color [ ] Started show Plymouth Boot screen [ ] Reached target Paths [ ] Reached target Basic System . . . . . . [ ] Stopped Apply Kernel Variables [ ] Stopping Apply Kernel

Hi, Yes nvidia driver is installed in the computer. I am not sure how my colleague did this and presently he is not in my lab. -Dhana -- PhD Student, Bionanoscience and Biochemistry Laboratory (Heddle Lab), Malopolska Center of Biotechnology, Jagiellonian University, Krakow, Poland.

Hi, I seem to have rather silly problem. I''m trying to run the script for the DRb server in the acts_as_ferret trunk for setting up a centralized index server. When I try to run script/runner vendor/plugins/acts_as_ferret/script/ferret_server, I get a ruby error /opt/csw/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/runner.rb:27: undefined local variable or method `vendor''

Hi, I am fairly new to R, and am stuck. I want to write an R function with argument n that returns a vector of length n with n simulated observations from the double exponential distribution with density: ??g(y) = 1/2e^-y ? For the double exponential, I want to generate y~Exp(1) and then take ?y with probability 0.5 ? Does anyone know how I can do this in R? Thanks! Fran [[alternative

...ula from a multivariate Gamma distribution with its marginals gamma-distributed. The multivariate Gamma should be able to contain a correlation coeficient or matrix. I have studied the book "Continuous Multivariate Distributions vol.I Models and applications" by Johnson & Kotz & Balakrishnan but what I constructed doesn't really look like a Copula. So my question is: Can such a Copula exist? And if yes, are ther R-packages which could help? Yours truly Peter

HI Every one Could some one provide me definitions of following bivariate distributions gamma, exponencial, Weibull, half-normal , Rayleigh, Erlang,chi-square thanks A.S. Qureshi

Dear Sirs, I am exploring the R package and its documentation. I find there is the function example which runs examples from documentation pages. What confuses me is that running example interferes with the variables I have in my workspace. > x <- 0 > example(mean) > x Now x is a vector of some values coming from the example. Am I using example in the wrong way? In situation like

...m dialplan_data where ext='${SQL_ESC(${ARG1})}' writesql=UPDATE dialplan_data SET name='${SQL_ESC(${VAL1})}' WHERE ext='${SQL_ESC(${ARG1})}' then i searched and there is no file available with name libodbcpsql.so. How do can i make it possible to work ? Thanks in Advance, Balakrishnan M root at astserver: ~#isql -v banking [IM004][unixODBC][Driver Manager]Driver's SQLAllocHandle on SQL_HANDLE_HENV failed [ISQL]ERROR: Could not SQLConnect root at astserver: ~# -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipe...

Two questions: 1. inverse.gaussian is up there as one of the glm families, but do people ever use it? There is no inverse.gaussian in the R distribution family, and when I checked McCullagh & Nelder, it only appeared twice in the book (according to subject index), once in the table on p. 30 and once on p. 38 in a passing sentence. Is there a good reference on this distribution? 2. When I

Hi all, I'm looking for an analytic method to obtain the PDF & CDF of the sampling distribution of a given correlation (rho) at a given sample size (N). I've attached code describing a monte carlo method of achieving this, and while it is relatively fast, an analytic solution would obviously be optimal. get.cors <- function(i, x, y, N){ end=i*N

> On 14 Aug 2017, at 13:43 , Spencer Graves <spencer.graves at effectivedefense.org> wrote: > > > > On 2017-08-14 5:53 AM, peter dalgaard wrote: >>> On 14 Aug 2017, at 10:13 , Troels Ring <tring at gvdnet.dk> wrote: >>> >>> Dear friends - I hope you will accept a naive question on lm: R version 3.4.1, Windows 10 >>> >>> I

On 2017-08-14 5:53 AM, peter dalgaard wrote: >> On 14 Aug 2017, at 10:13 , Troels Ring <tring at gvdnet.dk> wrote: >> >> Dear friends - I hope you will accept a naive question on lm: R version 3.4.1, Windows 10 >> >> I have 204 "baskets" of three types corresponding to factor F, each of size from 2 to 33 containing measurements, and need to know if the

hi, i am using R for first time. i am trying to do T-test for a sample set with three variables. i attached my data set as CSV file. but when i do "t.test(data$Day.1,data$Day.2,var.equal=T)" i get this following error. Can anyone please help e identify the problem. Error in if (stderr < 10 * .Machine$double.eps * abs(mx)) stop("data are essentially constant") : missing