similar to: Reading the documentation (was isoMDS error message!!!)

uhps!! I forgot to tell you that I'm running R 0.99.0 for windows32 on windows 95 osr2. Thank you very much for the latest R-1.0.0 (even if I don't tried it yet)!!! Andrea Rossetti University of Perugia (Italy) Statistical Science Department. ---------- Forwarded message ---------- Date: Tue, 29 Feb 2000 17:03:51 +0100 (MET) From: Andrea Rossetti <rossetti at markov.stat.unipg.it>

Hi to all, I do this > valumod<-read.table("valu-medie.txt",header=T) > library(mass) > library(mva) > valumod.x <- as.matrix(valumod) > valumod.dist<-dist(valumod.x) > valumod.mds <- isoMDS(valumod.dist) Error in isoMDS(valumod.dist) : zero or negative distance between objects 2 and 4 > Where is the error? Andrea Rossetti. PS I've attached the

Hi, I'm trying to use isoMDS to project a directed graph to 2-dim vectors, but I got an error. #here is the code to create the graph using igraph package and run isoMDS on it. library(igraph) library(MASS) g<-make_graph(c(1,2, 2,3, 2,4, 3,4, 4,5, 5,6, 3,6, 1,6, 2,5),directed=TRUE) dist<-distances(g, mode="out") loc<-isoMDS(dist) # below is content of the dist matrix

Hello everyone, I have a question on isoMDS. My data set (of vegetation) with 210 samples is in this way: Rotfoehrenau Lavendelweidenau Silberweidenau .... 067_Breg.7 0 2 0 .... 071_Dona.4 0 2 6 .... ... I want to do an isoMDS-analysis with the dissimilarity index

> From rossetti at stat.unipg.it Sat Dec 13 09:53 NZD 1997 > Date: Fri, 12 Dec 1997 21:47:58 +0100 > From: Andrea Rossetti <rossetti at stat.unipg.it> > MIME-Version: 1.0 > To: Robert Gentleman <rgentlem at stat.auckland.ac.nz>, r-devel <r-devel at stat.math.ethz.ch>, r-help <r-help at stat.math.ethz.ch> > Subject: Re: R-beta: new executable >

Using Rseptbeta for Windows 95 I encountered this problem: > library(mva) > data(quakes) > dist(quakes) Error: memory exhausted I'm using a pentium 133 with 32 MB ram memory! What I must to do? Thanks and excuse me for my english! Andrea Rossetti, rossetti at stat.unipg.it _______________________________________________________ Statistica & Informatica per la Gestione delle

Hi, this is a second try to post this to the R-help mailing list. The first one has been rejected because of a too large attachment. Now I ask this without attaching the data. If you want to reproduce the results, please contact me directly to get the data. (First mail, rejected:) > Attached there is a 149*149 dissimilarity matrix; it is a file obtained by >

Dear List: I have a question regarding an MDS procedure that I am accustomed to using. I have searched around the archives a bit and the help doc and still need a little assistance. The package isoMDS is what I need to perform the non-metric scaling, but I am working with similarity matrices, not dissimilarities. The question may end up being resolved simply. Here is a bit of substantive

Dear useRs, last week I asked you about a problem related to isoMDS. It turned out that in my case isoMDS was trapped. Nonetheless, I still have some problems with other data sets. Therefore I would like to know if anyone here has experience with how well isoMDS performs in comparison to other non-metric MDS routines, like Minissa. I have the feeling that for large data sets with a high

I have just downloaded rsept.zip and rseptbeta.zip for Windows 95 and I think that is a GREAT product. 1st: I want to know the differences between them. 2nd: I'm interested very much in time series analysis, but watching the html help there is not any function (for ex. like the S-Plus functions acf pacf and arima functions etc). If there is some pacages to plug-in with documentation

I have just downloaded rsept.zip and rseptbeta.zip for Windows 95 and I think that is a GREAT product. 1st: I want to know the differences between them. 2nd: I'm interested very much in time series analysis, but watching the html help there is not any function (for ex. like the S-Plus functions acf pacf and arima functions etc). If there is some pacages to plug-in with documentation

>Date: Thu, 15 Oct 1998 15:30:22 +0200 >To: Guido Masarotto <guido at sirio.stat.unipd.it> >From: Andrea Rossetti <rossetti at stud.unipg.it> >Subject: probably "round()" bug > >Hi to all R people, >I'm using the Guido Masarotto's compiled R, version 0.62.3. >there is a probably bug in round function, in fact I've done: > >>

>Date: Thu, 15 Oct 1998 15:30:22 +0200 >To: Guido Masarotto <guido at sirio.stat.unipd.it> >From: Andrea Rossetti <rossetti at stud.unipg.it> >Subject: probably "round()" bug > >Hi to all R people, >I'm using the Guido Masarotto's compiled R, version 0.62.3. >there is a probably bug in round function, in fact I've done: > >>

If tbl is an object of class 'dist', you can do this: a <- sammon(tbl, k=3) But you can't do this: b <- isoMDS(tbl, k=3) Wouldn't it be sensible to have identical interfaces to sammon() and isoMDS() ? I think all that would be needed is to change this: isoMDS <- function(d, y=cmdscale(d, 2), maxit=50, trace=TRUE) { ...into this: isoMDS <-

Hi, For example: I built a half matrix "w" using a daisy(x, metric = c("euclidean")) http://www.nabble.com/file/p25211016/1.jpg And next I transformed this matrix "w" using isoMDS function, for example isoMDS(w, k=2) and as result I got: http://www.nabble.com/file/p25211016/2.jpg And now I have two questions: 1. If number in matrix w[2, 1] (= 0.41538462) match

When I type "isoMDS()" in the R environment, a error shows up: no such function "isoMDS". Why? And what should I do to use isoMDS? Additionally, I cannot install add-on packages. Typing "Rcmd.exe INSTALL e:/VR_7.2-44.zip" results in "'perl' is neither command nor executable file...". Why this happens?Thanks. The setup file I downloaded is

Hi all, I try to calculate the stress of a configuration using the formula in the isoMDS help, but I don't have the same result than the stress returned by isoMDS : > library(mva) > library(MASS) > data(swiss) > swiss.x <- as.matrix(swiss[,-1]) > swiss.dist <- dist(swiss.x) > swiss.mds <- isoMDS(swiss.dist) initial value 2.979731 iter 5 value 2.431486 iter 10

I am starting with a matrix in which rows are vegetation plots and columns are various characteristics including ID# and elevation. I removed elevation and ID columns to avoid having those characteristics influence the distances between points which I calculated using the "dist" command. The resulting distance file was then used in isoMDS. What I want to know is whether I can

Hi I'm an R for windows 95 user, where can I find documentation for "splines", "survival4", "eda" and "mva" packages? Andrea Rossetti. _______________________________________________________ Statistica & Informatica per la Gestione delle Imprese | Universit? degli Studi di Perugia (Italia) | iiasc home page: http://www.stat.unipg.it

I'm using W95 rseptbeta how can I find documentation for: * eda, * mva, * spline, * survival4, libraries? Andrea Rossetti _______________________________________________________ Statistica & Informatica per la Gestione delle Imprese | Universit? degli Studi di Perugia (Italia) | iiasc home page: http://www.stat.unipg.it |