Dear all, I am sending you a copy of a demo that i am trying to make that work and embedded in a more complicated structure. The problem is that i want to get a list of 2 objects (matrices in specific, and thats why i am not specifing a .combine argument if i am not wrong..), but the first element of the list is just null. the second one is perfectly fine. Any idea? Thank you in advance
library(doMC) registerDoMC(2) Xa<-matrix(1:100,ncol=10) Sa<-matrix(101:200,ncol=10) Ta<-matrix(1:100,ncol=10) get.Xp <- function(Xa,Sa){ result <- Xa%*%Sa return(result) } get.Sa.post <- function(Xa,Ta){ result <- Ta%*%Sa return(result) } func.list <- list(get.Xp,get.Sa.post) post.ls <- foreach(i =1:2) %dopar% { fun <- func.list[[i]] if(i==1){fun(Xa,Sa)} if(i==2){fun(Ta,Sa)} } post.ls [[1]] NULL [[2]] [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [1,] 154855 169455 184055 198655 213255 227855 242455 257055 271655 286255 [2,] 155910 170610 185310 200010 214710 229410 244110 258810 273510 288210 [3,] 156965 171765 186565 201365 216165 230965 245765 260565 275365 290165 [4,] 158020 172920 187820 202720 217620 232520 247420 262320 277220 292120 [5,] 159075 174075 189075 204075 219075 234075 249075 264075 279075 294075 [6,] 160130 175230 190330 205430 220530 235630 250730 265830 280930 296030 [7,] 161185 176385 191585 206785 221985 237185 252385 267585 282785 297985 [8,] 162240 177540 192840 208140 223440 238740 254040 269340 284640 299940 [9,] 163295 178695 194095 209495 224895 240295 255695 271095 286495 301895 [10,] 164350 179850 195350 210850 226350 241850 257350 272850 288350 303850 -- View this message in context: http://r.789695.n4.nabble.com/foreach-returns-null-first-object-in-the-list-tp4676303.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org 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.