Dear all, I want to describe the time interval between mammography screenings as a function of several clinical and demographic variables. For each woman (ID), I have multiple events and each event corresponds to the time interval between two consecutive mammography screenings. Also, women's data sets come from ten different primary health centres (PHC). I have data from 1995 up to 2013. I have 8828 women under study and each woman has at most 7 events (that is, 7 lines, where the last line is always a censured event because it corresponds to the date when the woman is lost to follow-up).
I tried to run the frailtyHL package in R: frailtyHL(Surv(Time_2-Time_1,Event)~x+(1|ID)+(1|PHC),data=ficheiro.dados,RandDist="Normal",mord=1,dord=1,convergence=10^-4) where, x is a generic independent variable. but it gave the following error: Error: cannot allocate vector of size 1.5 Gb In addition: Warning messages: 1: Reached total allocation of 8172Mb: see help(memory.size) 2: Reached total allocation of 8172Mb: see help(memory.size) 3: Reached total allocation of 8172Mb: see help(memory.size) 4: Reached total allocation of 8172Mb: see help(memory.size) What can I do to deal with this problem? Thanks, in advanced, for your help. Best regards, Helena Mouriño Nunes. ______________________________________________ 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.
