[R] error propagation

[Steven Van Wilgenburg]

Hello,


I wish to examine the influence of error in variables on my analyses 
via error propagation. I have a data frame (x) as follows:

id   response
1    -121
2    -131
3    -125
etc.....

I wish to propagate errors for each row in the data frame, where error 
is distributed around the value of the response variable. To do this, I 
wish to simulate 1000 variables for each row in the above data frame. I 
wrote the following, but suspect that it is not applying the function 
to each row....

sim<-rnorm(1000,mean=x$response, sd= (rnorm(1000,mean= 9.454398, 
sd=1.980136)))

Do I need to use tapply to have the function iteratively go through 
each row? 

Any advice would be appreciated.


-Steve