[R] numbers loop in R

[emj83]

I would like to create a matrix in R that looks similar to this:

     [,1] [,2] [,3] [,4]
[1,]  NaN  1  2  3
[2,]  NaN  1  2  4
[3,]  NaN   1  2  5
[4,]  NaN  2  3  4
[5,]  NaN  2  3  5
[6,]  NaN    3    4    5

I have the loop below:

where A for example is 5

matrixx<-function(A){
B=matrix(NaN,nrow=(A+1),ncol=4)
        for(k in 1:(A+1)){
	        for(i in 1:(A-2)){
		     for(j in (i+2):A){		
		     }		
		}	
       }
B[k,]=c(NaN,i,(i+1),j)
print(B)
}

But it only prints the final line in:

> matrixx(5)
     [,1] [,2] [,3] [,4]
[1,]  NaN  NaN  NaN  NaN
[2,]  NaN  NaN  NaN  NaN
[3,]  NaN  NaN  NaN  NaN
[4,]  NaN  NaN  NaN  NaN
[5,]  NaN  NaN  NaN  NaN
[6,]  NaN    3    4    5

Could anyone give me a hand? Would be much appreciated.

Thanks Emma

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