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) |
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