Re: [R] Help with basic loop

From: Daniel Malter <daniel_at_umd.edu>
Date: Sun, 10 Apr 2011 16:06:03 -0700 (PDT)

The loop is correct, you just need to make sure that your result is computed and stored as the n-th element that is returned by the loop. Pick up any manual of R, and looping will be explained there. Also, I would recommend that you draw a random number for every iteration of the loop. Defining the random vectors outside the loop make sense to me only if they are the same length as n.

prob<-numeric(1000)

for (n in 1:1000) {

task1 <- runif(1, min=0.8, max= 0.9) 
task2 <- runif(1, min=0.75, max= 0.85) 
task3 <- runif(1, min=0.81, max= 0.89)

prob[n]<-task1*task2*task3
}

If you wanted to store the individual probabilities (task1..3), you would proceed accordingly by defining them outside the loop and storing the value in the loop as the n-th element of that vector just like for prob.

HTH,
Daniel

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Received on Sun 10 Apr 2011 - 23:13:15 GMT

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