random number generator
Hi,
using the java built-in random number generator, I generated from an original dataset 100 pseudo-datasets of the same size of my original dataset
How likely it is that the pseudo-datasets are similar/ the same?
(original dataset contains data for 600 cases, each case have data associted with, so I generated 100 datasets from my original dataset, each one contain 600 cases. are the 100 generated datasets expected to be similar in composition?)
i would really appreciate your help
thanks
[530 byte] By [
sali_dia] at [2007-10-3 11:48:45]
Without seeing your code and what you mean by "datasets" and "similar or the same," it's impossible to say for sure.
Try this though:
import java.util.Random;
public class Rand {
public static void main(String[] args) throws Exception {
System.out.println("Test1:");
for (int ix = 0; ix < 20; ix++){
Random rand1 = new Random();
System.out.print(rand1.nextInt(100) + " ");
}
System.out.println();
System.out.println();
System.out.println("Test2:");
Random rand2 = new Random();
for (int ix = 0; ix < 20; ix++){
System.out.print(rand2.nextInt(100) + " ");
}
}
}
If you're on 1.5, you should see okay behavior in both cases. For <= 1.4 however, you might not like what happens in Test 1.
jverda at 2007-7-15 14:22:03 >
