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115mb
2005 May 30
3
rbind wastes memory
...wastes memory and seems to "forget" to release memory.
For example I have 10 files. Each file contains a large dataframe "ds" (3500 cols
by 800 rows) which needs ~20 MB RAM if it is loaded as the only object.
Now I try to bind all data frames to a large one and need more than 1165MB (!)
RAM (To simplify the R code, I use the same file ten times):
________ start example 1 __________
load(myFile)
ds.tmp <- ds
for (Cycle in 1:10) {
ds.tmp <- rbind(ds.tmp, ds)
}
________ end example 1 __________
Stepping into details I found the following (comment shows RAM us...