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ekstr
2010 Jun 09
1
counting across leves of factors
...is factors and the numbur how many time is this combination in my dataset.
I wrote one code, but this is very slow and dumb.
it looks like this:
i<-0
for(i1 in levels(hivdat$pohl)){
a<-subset(hivdat,hivdat$pohl==i1)
for(i2 in levels(a$vekF)){
b<-subset(a,a$vekF==i2)
for(i3 in levels(b$ekstF)){
c<-subset(b,b$ekst==i3)
for(i4 in levels(c$zam)){
d<-subset(c,c$zam==i4)
for(i5 in levels(d$saman)){
e<-subset(d,d$saman==i5)
for(i6 in levels(e$test)){
f<-subset(e,e$test==i6)
for(i7 in levels(f$aktiv)){
g<-subset(f,f$aktiv==i7)
for(i8 in levels(g$pocpartF)){
h<-subset(g,g$vek...