search for: day_count

As Jim has indicated, memory usage problems can require very specific diagnostics and code changes, so generic help is tough to give. However, in most cases I have found the dplyr package to be more memory efficient than plyr, so you could consider that. Also, you can be explicit about only saving the minimum results you want to keep rather than making a list of complete results and extracting

My find_by_sql is not returning attributes of the calling model class. Thermo.find_by_sql("SELECT COUNT(*) FROM thermo WHERE thermo_loc = ''back'' GROUP BY DAYOFWEEK(time_on) ASC") # ==> [#<Thermo >, #<Thermo >, #<Thermo >, #<Thermo >, #<Thermo >, #<Thermo >, #<Thermo >] The sql is fine and when I checked it in a mysql

Dear R Forum, I have about 2000+ FX forward transactions and I am trying to run 1000 simulations. If I use less no of simulations, I am able to get the desired results. However, when I try to use more than 1000 simulations, I get following error. > sorted2 <- ddply(sorted, .(currency_from_exch, id), mutate, change_in_mtm_bc = mtm_bc - mtm_bc[1]) Error: cannot allocate vector of size 15.6