Function gives numeric(0) for every input
Though it seems a pity to even hint, what value have you assigned to "phat" and what is the value returned when the function runs?
On Saturday, November 19, 2011 18:52:20 alex_janssen wrote:
Hi, I am trying to code buffons needle in R for a class This is my code w/ output from R, if anyone could tell me why this is happening it would be amazing, I can generate correct results without putting the steps into a function but alas that is the assignment.
buffon = function(n){
+ x = NULL
+ theta = NULL
+ a = NULL
+ phat = numeric(0)
+ i = 1
+
+ while ( i <= n){
+ x[i] <- runif(1,0,1/2)
+ theta[i] <- runif(1,0,pi/2)
+ a[i] <- 1/2 * (sin(theta[i])) - x[i]
+
+
+ if (a[i] <= 0)phat <- phat + 1
+ else phat<-phat
+ i <- i + 1
+
+ }
+ return(phat)
+ }
buffon(10)
numeric(0) Thanks Again the response should be the number of times a[i] is less than or equal to zero, which i am calling phat -- View this message in context: http://r.789695.n4.nabble.com/Function-gives-numeric-0-for-every-input-tp40 87834p4087834.html Sent from the R help mailing list archive at Nabble.com.
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