Since you're asking where else to post, I would suggest the R-help mailing list for your particular case. (And be sure to read the posting guide before sending.)
If you have a question about a specific package, you could also contact the author/maintainer of that package (but only after you have "done your homework" and searched around without finding a solution). And please reply cc to the list, even if you're replying to my email, otherwise it won't get archived and other people cannot contribute. M On 09/24/2014 04:42 PM, Hounkpatin Ozias wrote: > Hi Smith, > I looked through the replicate function. you got my question right > actually. I have just tried it using the code: > >>rep<-replicate(100, randomForest(RSG ~ ., data=tr,nodesize = > 1,ntree=1000,importance=TRUE, proximity=TRUE, mtry=2)) >>rep > I got the result below 100 times. > > [,1]......................................................................................... > > [,100] > call Expression > type "classification" > predicted factor,890 > err.rate Numeric,6000 > confusion Numeric,30 > votes Numeric,4450 > oob.times Numeric,890 > classes Character,5 > importance Numeric,126 > importanceSD Numeric,108 > localImportance NULL > proximity Numeric,792100 > ntree 1000 > mtry 2 > forest List,14 > y factor,890 > test NULL > inbag NULL > terms Expression > Now the question remains for me to get the OBB errors and variable > importance, not each run, but considering the means of the 100 runs. > When I call the following output after replicate, I got only NULL. >> rep1$err.rate > NULL >> > rep1$ntree > NULL >> rep1$mtry > NULL >> rep1$y > NULL > I am new in R and new also in this data list. if my post does not fit > the purpose of the data list, I will appreciate if anyone could direct > me to a better platform dealing with this issue. > Thanks. > > > Le Mercredi 24 septembre 2014 8h53, Michael Smith <[email protected]> > a écrit : > > > Not sure whether I understand you correctly (and whether this is even a > data.table question), but maybe you are looking for `replicate`? > > M > > > On 09/24/2014 02:55 PM, Hounkpatin Ozias wrote: >> Hello to everyone, >> >> I am interested in doing some iteration in using Random Forest >> (classification purpose) with different value of mtry= 2, 4, 6, 9, 12. I >> want to repeat each run 100 times. that is with mtry=2 for example, run >> it 100 times. As output, I would like to have the aggregate out of bag >> errors (total means over the 100 runs) as well as well as the variable >> importance based on this 100 runs aggregated over their OBB errors. One >> could try it one by one, report each value but it is very laborious. Is >> there anyway to have R run the Random Forest 100 times, and give me as >> output the resulting (aggregated means) OOB errors and variable >> importance. here was my code. >> >> r2 <- randomForest(Factor ~ ., data=tr, nodesize = 1,ntree=1000, >> importance=TRUE, proximity=TRUE, mtry=2) >> #I want a 100 run of this >> #get average OOB errors >> #get variable importance based on these aggregated OBB errors. >> >> Thank you very much. >> >> >> >> _______________________________________________ >> datatable-help mailing list >> [email protected] > <mailto:[email protected]> >> > https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help >> > > _______________________________________________ datatable-help mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
