R help - Feb 2014 - geneation

how do i use set.seed? for example i want to generate fix x with different value
of y each time i.e

genarate x<-rnorm(10)
generate y<-rnorm(10)
i want have x fix but y changes at each iteration. this what i try but is not
working


{
set.seed(100)
 
x<-10*runif(10)
}
x
set.seed(y<-rnorm(10))
y
	[[alternative HTML version deleted]]

Hello,

I'm not sure I understand the question. When you use set.seed, it will 
have effect in all calls to the random number generator following it. So 
the value for y is also fixed.
As for your code, you don't need the second set.seed. And though it is 
not syntatically incorrect, the way you are coding it is not very usual. 
Try instead

set.seed(100)
x <- 10*runif(10)
x

y <- rnorm(10)
y

y <- rnorm(10)  #different y
y


Hope this helps,

Rui Barradas

Em 20-02-2014 07:05, IZHAK shabsogh escreveu:
> how do i use set.seed? for example i want to generate fix x with different
value of y each time i.e
>
> genarate x<-rnorm(10)
> generate y<-rnorm(10)
> i want have x fix but y changes at each iteration. this what i try but is
not working
>
>
> {
> set.seed(100)
>
> x<-10*runif(10)
> }
> x
> set.seed(y<-rnorm(10))
> y
> 	[[alternative HTML version deleted]]
>
>
>
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