Can someone please explain for me what the vcells and ncells ?used? column means when I run gc()?> gc()used (Mb) gc trigger (Mb) max used (Mb) Ncells 882296 23.6 13812157 368.9 19400892 518.1 Vcells 14811586 113.1 114763459 875.6 317464335 2422.1>(I read the help file , but still do not fully understand?) Also, how do I determine the total memory being used?Do I simply run memory.size()? Finally, when I run memory. size(max=T), I get a negative value. What does this mean