[R] RandomForest, Party and Memory Management

[Jeff Newmiller]

Neither of your questions meets the Posting Guidelines (see footer of any email).
1) Not reproducible. [1]
2) Very operating-system specific and a FAQ. You have not indicated what your OS is (via sessionInfo), nor what reading you have done to address memory problems already (use a search engine... or begin with the FAQs in R help or on CRAN).

[1] http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
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Sent from my phone. Please excuse my brevity.

Lorenzo Isella <lorenzo.isella at gmail.com> wrote:

>Dear All,
>For a data mining project, I am relying heavily on the RandomForest and
> 
>Party packages.
>Due to the large size of the data set, I have often memory problems (in
> 
>particular with the Party package; RandomForest seems to use less
>memory).  
>I really have two questions at this point
>1) Please see how I am using the Party and RandomForest packages. Any  
>comment is welcome and useful.
>
>
>
>myparty <- cforest(SalePrice ~ ModelID+
>                    ProductGroup+
>                    ProductGroupDesc+MfgYear+saledate3+saleday+
>                    salemonth,
>                    data = trainRF,
>control = cforest_unbiased(mtry = 3, ntree=300, trace=TRUE))
>
>
>
>
>rf_model <- randomForest(SalePrice ~ ModelID+
>                     ProductGroup+
>                     ProductGroupDesc+MfgYear+saledate3+saleday+
>                     salemonth,
>                     data = trainRF,na.action = na.omit,
>    importance=TRUE, do.trace=100, mtry=3,ntree=300)
>
>2) I have another question: sometimes R crashes after telling me that
>it  
>is unable to allocate e.g. an array of 1.5 Gb.
>However, I have 4Gb of ram on my box, so...technically the memory is  
>there, but is there a way to enable R to use more of it?
>
>Many thanks
>
>Lorenzo
>
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