search for: rousseeuw

Dear all, I am no stat wiz and I am just trying to use the AGNES algorithm at my very modest level of statistical of understanding. I have difficulties understanding the ouput from AGNES. My question is: how to interpret the output, especially how do you I know which cluster solution is the best? In SPSS, an Agglomeration Schedule table is produced and I used to look at the biggest jump between

...ithms can only accept a dissimilarity matrix, normally generated by daisy(). However, daisy only accept 'data matrix or dataframe. Dissimilarities will be computed between the rows of x'. Is there any way to say to that your data are already a similarity matrix (triangular)? In Kaufman and Rousseeuw's FORTRAN implementation (1990), they showed an option like this one: "Maybe you already have correlations coefficients between variables. Your input data constist on a lower triangular matrix of pairwise correlations. You wish to calculate dissimilarities between the variables." Bu...

Hi. I'm checking into robust methods for principal components analysis. There seem to be several floating around. I'm currently focusing my attention on a method of Hubert, Rousseeuw, and Vanden Branden (http://wis.kuleuven.be/stat/Papers/robpca.pdf) mainly because I'm familiar with other work by Rousseeuw and Hubert in robust methodologies. Of course, I'd like to obtain code for this method, or another good robust PCA method, if there's one out there. I haven...

...I will look for the books and articles below, of course, but I think I may have difficulty getting hold of the Kaufman book, at least. Sincerely, Faheem Mitha. **************************************************************************** (cluster) Kaufman, L. and Rousseeuw, P.J. (1990). Finding Groups in Data: An Introduction to Cluster Analysis. Wiley, New York. Struyf, A., Hubert, M. and Rousseeuw, P.J. (1997). Integrating Robust Clustering Techniques in S-PLUS, Computational Statistics and Data Analysis, 26, 17-37. (mclust) D. Banfield and A. E. Raftery, Model...

Hi! I tested two different implementations of the robust MCD estimator: cov.mcd from the MASS package and covMcd from the rrcov package. Tests were done on the hbk dataset included in the rrcov package. Unfortunately I get quite differing results -- so the question is whether this differences are justified or an error on my side or a bug? Here is, what I did: > require(MASS) >

Dear All, I am attempting to use the FANNY fuzzy clustering function in R (Kaufman & Rousseeuw, 1990), found in the "cluster" package. I have run into a variety of difficulties; the two most crucial difficulties are enumerated below. 1. Where is the 'm' parameter in FANNY? In _Finding Groups in Data: An Introduction to Cluster Analysis_ (1990) by Kaufman & Rousseeuw,...

Hi, I have been using the lqs function with method='lms'. However the results I get are a little different from the results noted by Rousseeuw & Leroy (Robust Regression and Outlier Detection) and I was wondering how to use these results for outlier detection. I'm using the stackloss dataset, for which the original Rousseeuw et al. program points out that observations 1,2,3,4 and 21 are outliers. This conslusion is arrived at by...

Has anyone ported the Bagplot function by Rousseeuw, Ruts, and Tukey from S to R? The S function comprises a script and a FORTRAN function. I assume porting is relatively uncomplicated, but since I have not done any porting before I would not want to invest the effort if a port is readily available.

...normally generated by daisy(). / / > However, daisy only accept 'data matrix or dataframe. Dissimilarities / / > will be computed between the rows of x'. / / > Is there any way to say to that your data are already a similarity / / > matrix (triangular)? / / > In Kaufman and Rousseeuw's FORTRAN implementation (1990), they showed an / / > option like this one: / / > "Maybe you already have correlations coefficients between variables. / / > Your input data constist on a lower triangular matrix of pairwise / / > correlations. You wish to calculate dissimilari...

...er Packages in library 'C:/PROGRA~1/R/R-26~1.0/library': base The R Base Package boot Bootstrap R (S-Plus) Functions (Canty) class Functions for Classification cluster Cluster Analysis Extended Rousseeuw et al. ... --- i've checked the Admin and Maint manual, but i'm stumped as to how to get yags to actually work. i copied and pasted the example from the html file in the yags folder and after every line that called yags, there was an error message that said: Error: could not find function...

Is there public domain code for cov.mve? Thanks, -k =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch

Hi everybody, I want to use the cluster package (Cluster Analysis Extended Rousseeuw et al.). I downloaded it from the CRAN and installed it on my linux system (fedora core 4). All seemed to be allright. But when trying to launch examples, I obtained the following message : > library(cluster) > data(votes.repub) > agn1 <- agnes(votes.repub, metric = "manhat...

Hi, I'm using the library cluster to cluster a set of figures (method CLARA). Somebody that it work with clustering would know informs what I make to evaluate the clustering? Tks VM, Francisco. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Francisco Júnior, Computer Science - UFPE-Brazil "One life has more value that the world whole" ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

...n of original files qn.f and sn.f, * translated by f2c (version 20010821). ==== ==== * and then by f2c-clean,v 1.9 2000/01/13 13:46:53 * and further clean-edited manually by Martin Maechler. * * Further added interface functions to be called via .C() from R or S-plus * Note that Peter Rousseeuw has explicitely given permission to * use his code under the GPL for the R project. */ /* Original comments by the authors of the Fortran original code, * (merged for Qn &amp; Sn in one file by M.M.): This file contains fortran functions for two new robust estimators of scale denoted...

...s that I now have gdata: Packages in library 'C:/PROGRA~1/R/R-23~1.0/library': base The R Base Package boot Bootstrap R (S-Plus) Functions (Canty) class Functions for Classification cluster Cluster Analysis Extended Rousseeuw et al. datasets The R Datasets Package foreign Read Data Stored by Minitab, S, SAS, SPSS, Stata, Systat, dBase, ... gdata Various R programming tools for data manipulation graphics The R Graphics Package grDevices The R G...

I use hierclust (hierarchical clustering) in multiv package. In the documentation it is said that plclust (plotting a dendrogram) is available in S-plus. Can I find it anywhere (I have searched through http://lib.stat.cmu.edu/S and found only quotations of plclust in multiv) or is it only part of the S package (which I don't have)? Thanks --------------- Charles RAUX, Laboratoire

...Bootstrap R (S-Plus) Functions (Canty) bootstrap ** No title available (pre-2.0.0 install?) ** car ** No title available (pre-2.0.0 install?) ** class Functions for Classification cluster Cluster Analysis Extended Rousseeuw et al. codetools Code Analysis Tools for R datasets The R Datasets Package foreign ** No title available (pre-2.0.0 install?) ** gplots ** No title available (pre-2.0.0 install?) ** grDevices The R Graphics Devices and Supp...

...Z's ordered observations Packages in library '/usr/lib/R/library': base The R Base Package boot Bootstrap R (S-Plus) Functions (Canty) class Functions for Classification cluster Cluster Analysis Extended Rousseeuw et al. codetools Code Analysis Tools for R datasets The R Datasets Package foreign Read Data Stored by Minitab, S, SAS, SPSS, Stata, Systat, dBase, ... graphics The R Graphics Package grDevices The R G...

The following code in clusplot.default (package cluster) is in error: x1 <- cmdscale(x, k = 2, eig = TRUE) var.dec <- sum(x1$eig)/sum(diag(x1$x)) if (var.dec < 0) var.dec <- 0 if (var.dec > 1) var.dec <- 1 x1 <- x1$points x1 has components with names "points" and "eig", not "x", so

...Packages in library '/usr/lib/R/library': base The R Base Package boot Bootstrap Functions (originally by Angelo Canty for S) class Functions for Classification cluster Cluster Analysis Extended Rousseeuw et al. codetools Code Analysis Tools for R compiler The R Compiler Package datasets The R Datasets Package foreign Read Data Stored by Minitab, S, SAS, SPSS, Stata, Systat, dBase, ... graphics The R G...