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additionalvals
2010 Dec 23
1
speed issues? read R_inferno by Patrick Burns: & a memory query
Hi,
I'm just starting out with R and came across R_inferno.pdf by Patrick Burns
just yesterday - I recommend it!
His description of how 'growing' objects (e.g. obj <- c(obj,
additionalValue) eats up memory prompted me to rewrite a function (which
made such calls ~210 times) so that it used indexing into a dimensioned
object instead (i.e. obj[i, ] <- additionalValue).
This transformed the process from
old version:
user system elapsed
133.436 14.257 155.807
new version:...