Displaying 1 result from an estimated 1 matches for "patday".
2004 Aug 06
3
Simple Lookup... why so slow
...and n=4000,
this is not linear in time, so something I don't understand
must go on.
And, just as an aside: why is $-indexing so much faster (!)
than numeric indexing?
Dieter
(all on Windows, latest R-Version)
----
# Generate Data set
StartDay = matrix(as.integer(runif(80)*20),nrow=4)
n=4000
PatDay = data.frame(Day = as.integer(runif(n)*20)+50,
Pat= as.integer(runif(n)*20)+1,
Treat = as.integer(runif(n)*4)+1,
DayOff=NA) # reserve output space
# Correct for days offset
ti= system.time(
for (i in 1:n)
PatDay$DayOff[i] =...