Hi Francesca,
> for(i in 1:length(x1<-c(100,1000,10000))){
j<-x1[i]
x1[i]<-mean(j)
}
> x1
[1] 100 1000 10000
A.K.
----- Original Message -----
From: Francesca <francesca.panco...@gmail.com>
To: r-help@r-project.org
Cc:
Sent: Friday, May 18, 2012 10:59 AM
Subject: [R] How to fix indeces in a loop
Dear Contributors,
I have an easy question for you which is puzzling me instead.
I am running loops similar to the following:
for (i in c(100,1000,10000)){
print((mean(i)))
#var<-var(rnorm(i,0,1))
}
This is what I obtain:
[1] 100
[1] 1000
[1] 10000
In this case I ask the software to print out the result, but I would
like to store it in an object.
I have tried a second loop, because if I index the out put variable
with the i , i get thousands of records which I do not want(a matrix
of dimension 10000).
for (i in c(100,1000,10000)){
for (j in 1:3){
x[j]<-((mean(i)))
#var<-var(rnorm(i,0,1))
}}
This is the x:
[,1] [,2] [,3]
[1,] 10000 NA NA
[2,] 10000 NA NA
[3,] 10000 NA NA
Clearly the object x is storing only the last value of i, 10000.
I would like to save a vector of dimension 3 with content 100,1000,10000,
but I do not know how to fix the index in an efficient manner.
Thanks for any help you can provide.
Francesca
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and provide commented, minimal, self-contained, reproducible code.
