Hi all,
I want to construct relatedness among individuals and have a look at the
following script.
#########################
rm(list=ls())
N=5
id = c(1:N)
dad = c(0,0,0,3,3)
mom = c(0,0,2,1,1)
sex = c(2,2,1,2,2) # 1= M and 2=F
A=diag(nrow = N)
for(i in 1:N) {
for(j in i:N) {
ss = dad[j]
dd = mom[j]
sx = sex[j]
if( ss > 0 && dd > 0 )
{
if(i == j)
{ A[i,i] = 1 + 0.5*A[ss,dd] }
else
{ A[i,j] = A[i,ss] + 0.5*(A[i,dd])
A[j,i] = A[i,j] }
}
} #inner for loop
} # outer for loop
A
If the sex is male ( sex=1) then I want to set A[i,i]=0.5*A[ss,dd]
If it is female ( sex=2) then A[i,i] = 1 + 0.5*A[ss,dd]
How do I do it ?
I tried several cases but it did not work from me. Your assistance is
highly appreciated in advance
Thanks
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