search for: cutler

...(absence is obviously indicated with a 0). I would like to randomise the matrices many times in order to construct null models. However, I cannot identify a function in R to do this, and the programming looks tricky for someone of my limited skills. Can anybody help me out? Many thanks, Nick Cutler Institute of Geography School of Geosciences University of Edinburgh Drummond Street Edinburgh EH8 9XP United Kingdom Tel: 0131 650 2532 Web: http://www.geos.ed.ac.uk/homes/s0455078

...get: ERROR: cannot extract package from package.tar.gz The author of the package assures me that the same command works for his version of solaris and R. He has solaris 5.7 and R 1.4.1, while I have solaris 5.8 and R 1.4.1. Does anyone know what's wrong and how to fix it? Thanks, Adele Cutler -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help 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-help-request at sta...

...since 4.0-7 (last public release) is shown below. As many changes were made to the package, it's very likely that new bugs have crept in. I'd very much appreciate bug reports or even patches! The plan is still to add features to the package so that it matches the features in Breiman and Cutler's latest Fortran version. There is also plan to add some functions so that the package will work with Adele Cutler's Java visualization program (RAFT). Best, Andy ==================================================== Changes in 4.3-0: * Thanks to Adele Cutler, there's now casewise va...

...since 4.0-7 (last public release) is shown below. As many changes were made to the package, it's very likely that new bugs have crept in. I'd very much appreciate bug reports or even patches! The plan is still to add features to the package so that it matches the features in Breiman and Cutler's latest Fortran version. There is also plan to add some functions so that the package will work with Adele Cutler's Java visualization program (RAFT). Best, Andy ==================================================== Changes in 4.3-0: * Thanks to Adele Cutler, there's now casewise va...

I'm just getting started with R, so feel free to point me to the appropriate documentation if this is already answered somewhere (though I've been unable to find it myself). This does seem like a rather basic question. I want to fold a table into a matrix. The table is formatted like so: Column_Index Value 1 486 2 688 3 447 4 555 5

I'm sure there must be various peak-finding algorithms out there. Not knowing of any, I have written one myself*, but I thought I'd ask to see what's out there. Basically, I have a 2-dimensional data set and I want to identify local peaks in the data, while ignoring "trivial" peaks. My naive algorithm first identifies every peak and valley (point of inflection change

I have a data frame with three columns, x, y, and a. I want to create a matrix from these values such that for matrix m: m[x,y] == a Obviously, I can go row by row through the data frame and insert the value a at the correct x,y location in the matrix. I can make that slightly more efficient (perhaps), by doing something like this: > for (each.x in unique(df$x)) m[each.x, df$y[df$x ==

...ure if this is accurate and i'd like to understand the purpose of this option I am PXE booting a LENOVO machine which fails unless i add mem=2048m and i am trying to better understand what this is doing so I can better understand why this works but leaving it out fails. sincerely, John Cutler

...inom* pmml.nnet* pmml.rpart* [10] pmml.rsf* pmml.rules* pmml.survreg* However, the R journal 1/1 pg 64 says there should be a method available ( http://journal.r-project.org/2009-1/RJournal_2009-1_Guazzelli+et+al.pdf ): Random Forest (and randomSurvivalForest) ? randomForest (Breiman and Cutler. R port by A. Liaw and M. Wiener, 2009) and randomSurvivalForest (Ishwaran and Kogalur , 2009): PMML export of a randomSurvivalForest "rsf" object. This function gives the user the ability to export PMML containing the geometry of a forest. However, if I run these lines of code: library...

I'm currently using the below function from some library (MASS?) for writing my data out to file. I'm using it instead of plain old "write" because it does buffering. The problem that I'm having is that the numbers are space padded, but I need true tab-delineated files. It looks like the spaces are coming from 'format', but I don't see an option for format to

...result usually not sensititve to it; and b) the built-in cross-validation via the use of out-of-bag data gives quite accurate estimate of test set error, and offers quite effective protection against overfitting. The code is based on version 3.1 of the original Fortran code written by Breiman and Cutler (http://www.stat.berkeley.edu/users/breiman/). The User Guide for the Fortran code on Breiman's web site explains some of the facilities provided in the code (such as assessing variable importance, and proximity measures). Some facilities provided in the original Fortran code have be taken ou...

...result usually not sensititve to it; and b) the built-in cross-validation via the use of out-of-bag data gives quite accurate estimate of test set error, and offers quite effective protection against overfitting. The code is based on version 3.1 of the original Fortran code written by Breiman and Cutler (http://www.stat.berkeley.edu/users/breiman/). The User Guide for the Fortran code on Breiman's web site explains some of the facilities provided in the code (such as assessing variable importance, and proximity measures). Some facilities provided in the original Fortran code have be taken ou...

...gt; takes k bits to > > >> store each split on k categories. To save storage, this > is `packed' into a > > >> 4-byte integer (32-bit), thus the limit of 32 categories. > > >> > > >> The current Fortran code (version 5.x) by Breiman and > Cutler gets around > > >> this limitation by storing the split in an integer > array. While this lifts > > >> the 32-category limit, it takes much more memory to > store the splits. I'm > > >> still trying to figure out a more memory efficient way > of...

"classwt" in the current version of the randomForest package doesn't work too well. (It's what was in version 3.x of the original Fortran code by Breiman and Cutler, not the one in the new Fortran code.) I'd advise against using it. "sampsize" and "strata" can be use in conjunction. If "strata" is not specified, the class labels will be used. Take the iris data as an example: randomForest(Species ~ ., iris, sampsize=c(10,...

I am trying to use the random forests package for classification in R. The Variable Importance Measures listed are: -mean raw importance score of variable x for class 0 -mean raw importance score of variable x for class 1 -MeanDecreaseAccuracy -MeanDecreaseGini Now I know what these "mean" as in I know their definitions. What I want to know is how to use them. What I am trying to

...s disappeared and nobody I've asked has been able to successfully contact him. If somebody wants to clean this up and merge it back into the main WINE tree, please do, because I don't know enough about DX9 to even think of attempting such an undertaking myself. http://www.cs.colostate.edu/~cutler/d3d9patch.2005-04-19.diff Of course, I'll feel rather foolish if Oliver pops up tomorrow and has a real patch, but here's what I can offer for now.

...user community will take place at Agrocampus, Rennes, France, July 8 to 10, 2000. The conference schedule comprises invited lectures and user-contributed sessions as well as half-day tutorials presented by R experts on July 7, 2009, prior to the conference. Invited speakers will include Adele Cutler, Peter Dalgaard, Jerome H. Friedman, Michael Greenacre, Trevor Hastie, John Storey, Martin Theus. The spectrum of user-contributed sessions will depend on your submissions. Hence, we invite you to submit abstracts for a talk or a poster on topics presenting innovations or exciting application...

...registration deadline). We encourage you to give a presentation at the conference and submit an abstract or a poster on topics presenting innovations or exciting applications of R. You can use the conference Web page at http://www.R-project.org/useR-2009/ Invited speakers will include: Adele Cutler, Peter Dalgaard, Jerome H. Friedman, Michael Greenacre, Trevor Hastie, John Storey, Martin Theus. July 7, 2009, half-day tutorials are presented by R experts prior to the conference. The conference web page: http://www.agrocampus-ouest.fr/math/useR-2009/accomodation.html gives a list of hotels a...

Hi, I need to transfer a local raw image to another datacenter. Is there a way to achieve good compression of this image, I heard of tools overwriting unused space with zeros. Is this a good idea? It's an W2k8 image/NTFS. Thx Rainer

...the author's permission, I ported the S code to R using two excellent sets of instructions: (1) From the FAQ - 5.5 How can I create an R package? (2) Thomas Lumley's instructions on porting S to R - http://www.biostat.washington.edu/~thomas/Rlib.html The author of this code is Adele Cutler (adele at math.usu.edu, http://www.math.usu.edu/~adele). With the author's permission, I've made this port available at: http://socrates.berkeley.edu/~lorenmc/R/ Since this is not a full-blown library and hasn't been completely tested with R, I don't think it is ready to be submit...