search for: urselman

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2009 Jan 14
2
Vectorization of three embedded loops
...] } sum.dist[i]<-min(sum); } bla<-rownames(start.b)[which(sum.dist==max(sum.dist))] val<-c(val,bla[1]); start.b<-start.b[-(which(match(rownames(start.b),val[length(val)])! ="NA")),]; if(length(val)>=val.n)break; } return(val); } Regards, Thomas Dr. Thomas Terhoeven-Urselmans Post-Doc Fellow Soil infrared spectroscopy World Agroforestry Center (ICRAF) [[alternative HTML version deleted]]
2010 Jun 16
1
Problems loading RWeka and rJava under R 2.10.1
...mespace load failed for '%s'", package), call. = FALSE, domain = NA) 1: library(RWeka) Kurt Hornik and me discussed already but are not sure how to proceed. Maybe somebody of you experienced this already or has an idea how to work around. Regards, Thomas Terhoeven-Urselmans p.s.: There might be a cross-posting using the webpage: www.r-help.com [[alternative HTML version deleted]]
2009 May 14
1
Least-square support vector machines regression!
...t yet implemented. At least I got error messages, which I could not find a solution for (Error in if (n !_dim(y)[1] stop ("Labels y and data x dont match"). Otherwise I could not find another LSSVM regression implementation in R, or is there? Regards, Thomas Dr. Thomas Terhoeven-Urselmans Post-Doc Fellow Soil infrared spectroscopy World Agroforestry Center (ICRAF) United Nations Avenue, Gigiri PO Box 30677-00100 Nairobi, Kenya Ph: 254 20 722 4113 or via USA 1 650 833 6654 ext. 4113 Fax 254 20 722 4001 or via USA 1 650 833 6646 Email: t.urselmans at cgiar.org Internet: http://worlda...
2012 Jan 12
1
problems with method ken.sto in package soil.spec: subscript out of bounds
....3) Error in ken.sto(mydata, per.n = 0.3) : subscript out of bounds I found that other people run into this problem as well: http://r.789695.n4.nabble.com/help-kennard-stone-algorithm-in-soil-spec-packages-does-not-work-for-my-dataset-td3031344.html The package maintainers email (Thomas Terhoeven-Urselmans) is apparently outdated, I already tried to send him an email. Any help would be very much appreciated, Best regards, Martin -- Dipl-Inf. Martin Gütlein Phone: +49 (0)761 203 8442 (office) +49 (0)177 623 9499 (mobile) Email: guetlein@informatik.uni-freiburg.de -- Dipl-Inf. Martin Gütlein Ph...
2010 Jul 18
6
CRAN (and crantastic) updates this week
...csv data, use the function rad, for Read, Attach and Display. The parallel function out writes the csv file. The function help.me provides a help system that suggests specific analyses by providing the name of the relevant functions for a specific topic. * soil.spec (1.3) Thomas Terhoeven-Urselmans http://crantastic.org/packages/soil-spec This package combines existing R functions with new code for soil spectral analysis. The result is an easy to use tool for (i) importing of spc-files, (ii) principal component analysis, (iii) sample selection using the Kennard-Stone algorithm, (i...