[R] Which variable exist after random

From: Sofyan Iyan <sofyan.iyan_at_gmail.com>
Date: Thu 02 Jun 2005 - 01:05:52 EST


Dear R-helper,
How could I count only some variable was exist after running sample
(random) function.
For example,

> testx <- factor(c("Game","Paper","Internet","Time","Money"))
> for(i in 1:2) {

+        x <- sample(testx,replace=TRUE)
+        print(x)
+    }
[1] Money    Money    Time     Internet Time    
Levels: Game Internet Money Paper Time
[1] Time Money Game Money Money
Levels: Game Internet Money Paper Time
>

The result above Game, Internet, Money, and Time only exist and "Paper" was missing.
Best, Sofyan



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