I have a 32000 x 14 matrix (M) where entry (x, y) corresponds to
person x at a discrete time y. I then have a matrix (M2) of 60000 x 2
where each entry is a an event by a person that is in the above 32000
and at a time that is in the range of the discrete time points above.
I want to populate the another matrix (M3) such that (x, y) is the
number of events of person x between times y-1 and y. This is simple
to code, (I just put the discrete time points and the 32000 people in
their own vectors, V1 and V2):
for (i in 1:32000){
for (j in 1:60000){
for (k in 2:14){
if (M2[1, j] == V2[i] & M2[2, j] > V1[k-1] & M2[2, j] <= V1[k])
M3[i, k] = M3[i, k]+1
}}}
This would work im sure, the problem is that it takes a very long
time. Any advice on helping it run faster would be greatly
appreciated.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
