performance - R: performence, memory use. Writing a text file or keeping all the information in R objects? -


through iteration construct big matrix , in order speed these iterations split matrix chunks put in list.

would have better save chunks of matrix text file , append new chunk on same text file instead of keeping them in list. change in terms of memory use , performence (time run simulation) ?

second question: there way know memory size of r object (without having save .rdata file)

thank in advance !

retain matrix in ram if possible. else can bigmemory package.

and latest version of r has better support large vectors. helpful if have 64-bit machine large amounts of ram.

note:since talking performance, practice pre-allocate matrix (instead of frequent use of rbind / cbind)


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