similar to: memory increasing

hi,R users, Now I have some scatter figures, is there some method can plot equalprobable error ellipse ? -- TANG Jie Email: totangjie@gmail.com Tel: 0086-2154896104 Shanghai Typhoon Institute,China [[alternative HTML version deleted]]

Hello! I need to use Kruskal-Wallis test and post-hoc test (Dunn's test) for my data. But when I searched around, I only found this function: kruskal.test. But nothing for Dunn's test. So I started to write one myself. But I do not know how to count ties in the data frame. I can use for loops but it seems long and unnecessary since the rank function actually knows the ties. So

hi, r users i have a problem with KNN. i have 2 datasets, X0 and X1. >dim(X0) >1471*13 dim(X1) >5221*13 and for every instances in the dataset X1, i want to find the nearest neighbour(1nn) in the dataset X0. and i dont have the true classifications of dataset X1. but the function knn() need true classifications(cl) to do prediction. i just curious if there are some other function

I tried to search for a string of words ``as one entity'' following the example in the help file: > RSiteSearch("{logistic regression}") and got the error message: 2008-09-11 08:55:41.356 open[823] No such file: /Users/rturner/http:/ search.r-project.org/cgi-bin/namazu.cgi?query={logistic+regression}

Is there a function in R that will allow me to estimate the sample size required from count data (poisson data?), given the known variance and desired margin of error and confidence interval? My specific data set will be based on a survey of hikers that will be asked about the number of animals of species 'x' they observed during a given period. I need to know the number of hikers

Hello, I can not get the function plot.logistic.fit.fnc() working....it returns "Error: could not find function "plot.logistic.fit.fnc"". Do I need to upload as specific package first? I am trying to check the fit of a mixed logistic model. Also, any advice for checking the assumption of independence in a mixed logistic model? Many thanks in advance, Sarah Foster

Is there any R package addressing problems of constrained optimization ? I have the following "apparently" simple problem: Given a set V with fixed cardinality: nv Given a set S whose cardinality is a parameter: nHat Let the cardinality of the intersection S.and.V be: nHatv The problem consists of maximizing nHatv/nv subject to a penalty if nHat >

Do you know any good editor R? -- View this message in context: http://www.nabble.com/Editor-R-tp23822342p23822342.html Sent from the R help mailing list archive at Nabble.com.

Dear R users, I'm trying to extract from a given matrix (GROUP) the coordinates of the vertices of the different groups (i.e. 3, 7, 1 . . .) to plot the polygons to delineate the area in which each group "wins" and colour it diferentially. I can make a simple point plot, but I would like to add polygons with full colored area. The example is with a 5x5 matrix, but I'm working

Dear R members, I would like to know if there is a stepwise function that gives LRT value instaed of AIC? thanks in advance, Luciana Pozzi CENPAT-CONICET Argentina [[alternative HTML version deleted]]

Hello everybody, after searching around for quite some time, I haven't been able to find a package that provides a function to compute the Windorized mean and variance. Also I haven't found a function that computes the trimmed variance. Is there any such package around? thanks, Roberto

Hello, I am very new to R. I would like to plot astronomy data by right ascension, declination, and various "distance" values, such as redshift and comoving distance, in 3D. Is there any 3D polar plotting functions? I can't seam to locate any information on whether it exists or not.

Hi all, I am new to R. Can someone please give me some hints in how to do the following things: 1- Get ONE permutation of a set. I have looked at the gregmisc package's permutations() method, but I just want to get one permutation at a time. 2- Simulate a Markov chain in R. For instance, I want to simulate the simple random walk problem, in which a person can walk randomly around 4 places.

Hi, I am aware that this question might be a basic one. I did browse the help and archives but I still haven't understood how to do the following: I run R locally and would like to read in data from a server for which there is a username and password. That is, how do I open a connection to a server with a password? Thanks, Hadassa -- Hadassa Brunschwig PhD Student Department of Statistics

Hi there - I am new to R, so perhaps this is an old question. I am looking to find the source code for the wald.test function so I can tune it for my own needs. Where do I find it? I do not want to change wald.test. Rather, I want to find it and make a new function, say wald.test.new. thanks Andrew Martin University of Delaware [[alternative HTML version deleted]]

Dear R Users, I'm looking for a package that allows to test hypothesis about a homogeneity of odds ratio in k 2x2 tables. I know that Breslow-Day is suitable but does anybody could me point out a package? I found diffR, but as far as I see this package is for IRT theory. Best, Robert

Hi, I have been looking through all packages but I cannot find a routine for LAD-regression (L1-norm-regression). Is there none? Willi

Dear Rxperts, Below is a small sample of values (cut short due to space considerations while posting).. I was wondering if it is possible to construct boundaries (or intervals) based on the distribution of points. Is it anything similar to boundary detection of distributions? x1 <-

I'm a new R user and am looking for an R equivalent to the Matlab 'cp2tform' function (see: http://www.mathworks.com/help/toolbox/images/ref/cp2tform.html). cp2tform accepts pairs of 2D control points and produces a least-squares optimized spatial transformation from one set of points to the other. Specifically, I'm looking to produce the coefficients of a 3rd order polynomial

Using Trellis, am successfully setting up a number of panels (25) in which I have two box and violin plots. I would like to colour - one plot as RED and the other as BLUE (in each panel). I can do that with the box plots, but the violin density areas just take on one colour. My basic call is as follows: bwplot(rmsd ~ file | code, data=spread_data.filtered, panel = function(...,