Dear R friends, Is there a formula for the amount of memory, that is needed by dist(), when you know the number of columns and rows? Or is there at least an approximation? Thomas Pesl -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
dist - memory
2 messages · Pesl Thomas, Laurent Gautier
1 day later
Pesl Thomas wrote:
Dear R friends, Is there a formula for the amount of memory, that is needed by dist(), when you know the number of columns and rows? Or is there at least an approximation?
As stated in the help for 'dist', the distance per row is computed, and only the lower triangle is stored in a single vector. Counting 8 bytes per numerical value, the memory used should be close to 8*nrows*nrows/2, upon which one should add the attributes of a dist object should added (you may want to neglect as the number of rows gets bigger). Laurent
Laurent Gautier CBS, Building 208, DTU PhD. Student D-2800 Lyngby,Denmark tel: +45 45 25 24 85 http://www.cbs.dtu.dk/laurent -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._