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10000m
2010 Sep 13
2
post
...g group at each row.
subset 1:
a b d
1
2
3
4
5
...
100000
subset 2:
e f g
1
2
3
4
5
...
100000
100000 t.test's for each row for these two subsets will take around 1 min. The prblem is that I have around 10000 different combinations of such a subsets. therefore 1min*10000
=10000min in the case if I will use "for" loop like this:
n1=10000 #number of subset combinations
for (i1 in 1:n1) {
n2=100000 # number of rows
i2=1
for (i2 in 1:n1) {
t.test(tab[i2,v5],tab[i2,v6])$p.value #v5 and v6 are vectors containing the veriable names for the two subsets (they are differ...