(the same mail was sent to the author) When I called the function DEoptim with control=list(strategy=1) or control=list(strategy=2) I got the error:
Error in mui[rtd + 1, i] : incorrect number of dimensions Analysis of the source code of the DEoptim reveals the following fragment if (con$strategy > 5) st <- con$strategy - 5 ## binomial crossover else { st <- con$strategy ## exponential crossover mui <- sort(t(mui)) ## transpose, collect 1's in each column for (i in 1:NP) { n <- floor(runif(1) * d) if (n > 0) { rtd <- (rotd + n) %% d mui[,i] <- mui[rtd + 1,i] ## rotate column i by n } } mui <- t(mui) ## transpose back } sort returns a 1-dimensional vector, this causes the error in the following indexing operators. This also shows, that any strategy value from 1 through 5 will cause this error, while values from 1 through 10 are possible. Package's DESCRIPTION file contains the following: Version: 1.1-8 Date: 2007-01-29 My sessionInfo(): > sessionInfo() R version 2.5.1 Patched (2007-08-19 r42614) i386-pc-mingw32 locale: LC_COLLATE=Russian_Russia.1251;LC_CTYPE=Russian_Russia.1251;LC_MONETARY=Russian_Russia.1251;LC_NUMERIC=C;LC_TIME=Russian_Russia.1251 attached base packages: [1] "tcltk" "stats" "graphics" "grDevices" "utils" "datasets" "methods" "base" other attached packages: debug mvbutils DEoptim "1.1.0" "1.1.1" "1.1-8" Unfortunately I haven't submerged deep enough to the algorithm details to propose the bug fix. -- View this message in context: http://www.nabble.com/bug-in-DEoptim-package-tf4353533.html#a12405068 Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.