Can't get data for all combinations - r

Question

I have 31 possible scenarios for the value of the average and I would like to generate for each scenario samples but I do not get as much as I would like.
This is the scenarios
> scenari<-s*shift;scenari
Var1 Var2 Var3 Var4 Var5
2 1.5 0.0 0.0 0.0 0.0
3 0.0 1.5 0.0 0.0 0.0
4 1.5 1.5 0.0 0.0 0.0
5 0.0 0.0 1.5 0.0 0.0
6 1.5 0.0 1.5 0.0 0.0
7 0.0 1.5 1.5 0.0 0.0
8 1.5 1.5 1.5 0.0 0.0
9 0.0 0.0 0.0 1.5 0.0
10 1.5 0.0 0.0 1.5 0.0
11 0.0 1.5 0.0 1.5 0.0
12 1.5 1.5 0.0 1.5 0.0
13 0.0 0.0 1.5 1.5 0.0
14 1.5 0.0 1.5 1.5 0.0
15 0.0 1.5 1.5 1.5 0.0
16 1.5 1.5 1.5 1.5 0.0
17 0.0 0.0 0.0 0.0 1.5
18 1.5 0.0 0.0 0.0 1.5
19 0.0 1.5 0.0 0.0 1.5
20 1.5 1.5 0.0 0.0 1.5
21 0.0 0.0 1.5 0.0 1.5
22 1.5 0.0 1.5 0.0 1.5
23 0.0 1.5 1.5 0.0 1.5
24 1.5 1.5 1.5 0.0 1.5
25 0.0 0.0 0.0 1.5 1.5
26 1.5 0.0 0.0 1.5 1.5
27 0.0 1.5 0.0 1.5 1.5
28 1.5 1.5 0.0 1.5 1.5
29 0.0 0.0 1.5 1.5 1.5
30 1.5 0.0 1.5 1.5 1.5
31 0.0 1.5 1.5 1.5 1.5
32 1.5 1.5 1.5 1.5 1.5
and this is the function
genereting_fuction<-function(n){
for (i in 1:length(scenari)){
X1=rnorm(n)+scenari[i,1]
X4=rnorm(n)+scenari[i,4]
X2=X1*p12+std_e2*rnorm(n)+scenari[i,2]
X3=X1*p13+X4*p43+std_e3*rnorm(n)+scenari[i,3]
X5=X2*p25+X3*p35+std_e5*rnorm(n)+scenari[i,5]
sample=cbind(X1,X2,X3,X4,X5)
return(sample)
}
}
genereting_fuction(10)
I should get 31 samples of size 10X5 but I get only one sample

Answer 1

You are applying the for loop over return as well and eventually returning the sample corresponding to the last scenario only.
Try this :
genereting_fuction<-function(n){
sample <- list()
for (i in 1:nrow(scenari)){
X1=rnorm(n)+scenari[i,1]
X4=rnorm(n)+scenari[i,4]
X2=X1*p12+std_e2*rnorm(n)+scenari[i,2]
X3=X1*p13+X4*p43+std_e3*rnorm(n)+scenari[i,3]
X5=X2*p25+X3*p35+std_e5*rnorm(n)+scenari[i,5]
sample[[i]]=cbind(X1,X2,X3,X4,X5)
}
sample
}
The output will be a list and its ith element will be a sample corresponding to the ith scenario.