a********a
发帖数: 346 | 1 I have around 1000 obersvations in my data set. I want to randomly select
200 observations each time. How to write a R code?
My data like:
ID age Z1 Z2
1 20 0.5 3
Thanks a lot. | s**c
发帖数: 1247 | 2 create 1000 uniform random samples, one for each obs
sort by the random sample, select the first 200
【在 a********a 的大作中提到】
: I have around 1000 obersvations in my data set. I want to randomly select
: 200 observations each time. How to write a R code?
: My data like:
: ID age Z1 Z2
: 1 20 0.5 3
: Thanks a lot.
| h******j
发帖数: 65 | 3 sample (1:1000, 200, replace=F) |
|
