# [R] for loop implementation in below problem

Goyani Zankrut z@nkrut20 @end|ng |rom gm@||@com
Sun Mar 21 17:55:56 CET 2021

```I created custom function according to my requirement which is given below:

*selection.index<- function(ID, phen_mat, gen_mat, weight_mat, GAY){  ID =
toString(ID)  p<- as.matrix(phen_mat)  g<- as.matrix(gen_mat)  w<-
as.matrix(weight_mat)  bmat<- solve(phen_mat) %*% gen_mat %*% weight_mat
GA<- 2.063 * t(bmat) %*% g %*% w / (t(bmat) %*% p %*% bmat)^0.5  PRE<-
if(missing(GAY)){    (GA/GA) * 100  } else {    (GA/GAY) * 100  }  result<-
list("ID" = ID, "b" = matrix(round(bmat,4), nrow = 1), "GA" = round(GA,4),
"PRE" = round(PRE,4))  return(data.frame(result))}*

*sc<- list()*
*sc[[1]]<- selection.index(ID = 12, pmat[1:2,1:2], gmat[1:2,1:2],
wmat[1:2,1])*
*sc[[2]]<- selection.index(ID = 13, pmat[c(1,3),c(1,3)],
gmat[c(1,3),c(1,3)], wmat[c(1,3),1])*

https://stackoverflow.com/questions/66734928/how-to-solve-this-through-loop
*"Healthy soil, Healthy life."*
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*ZANKRUT GOYANI*
*B.Sc. (Hons.) Agriculture*

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