Off topic:loop several conditions R

Question

[julrodr80]

I need to do a loop with several conditions (create three diferent objects several times) and with a loop nested. I write this:

`metaxcan <- c("foo1.csv", "foo2.csv")`
`predix_asso <- c("soo1.csv", "soo2.csv")`

`for (i in metaxcan){`
`for (j in predix_asso){`
  `PGC<-read.csv(i, header=T, sep=",")`
  `asociacion<-read.table(j, header=T, sep="") `

`PGC_predix <- merge(PGC,asociacion,by="gene")`
   `ngenes<-nrow(PGC_predix_1)  ` 



 `print(ngenes)` 

  `}` 
 `}`

But instead of print just 2 numbers (the merge between foo1 and soo1; and the merge of foo2 and soo2), it prints 4 numbers (all interactions)

How can I do? thanks