fibonacci

Is there any benefit by using OpenMP to parallelize the Fibonacci number calculations? There are several examples online which calculate Fibonacci numbers using the task directive in OpenMP. For example at http://docs.oracle.com/cd/E19205-01/820-7883/girtd/index.html and here http://openmp.org/forum/viewtopic.php?f=3&t=1231 Some of these examples claim the performance is better with OpenMP. I don't understand this as calculating the Fibonacci series is, to my understanding, fundamentally non parallel (ignoring methods based on closed form solutions, e.g. from Binet's formula). Additionally,

I'm using Task Parallel Library (TPL ) for calculating Fibonacci number. Program is given below: public static int Fib(int n) { if (n <= 1) { return n; } Task<int> task = Task.Factory.StartNew<int>(() => Fib(n - 1)); var p = Fib(n - 2); return task.Result + p; } public static void Main(string[] args) { Stopwatch watch = new Stopwatch(); watch.Start(); Console.WriteLine("Answer: " + Fib(44)); watch.Stop(); Console.WriteLine("Time: " + watch.ElapsedMilliseconds); } } Unfortunately this program takes a very long time to complete. But serial version of this program ( as given below ) takes less

We have been given a task, which we just can't figure out: Write an R function which will generate a vector containing the first n terms of the Fibonacci sequence. The steps in this are as follows: (a) Create the vector to store the result in. (b) Initialize the first two elements. (c) Run a loop with i running from 3 to n, filling in the i-th element Work so far: vast=function(n){ vast=vector() vast[1]=1 vast[2]=1 for(i in 3){vast[i]=vast[i-1]+vast[i-2]} } All we end up is with the error: object of type 'closure' is not subsettable ?? How are we supposed to generate the wanted function? My

This is my attempt: #!/bin/bash function fibonacci(){ first=$1 second=$2 if (( first <= second )) then return 1 else return $(fibonacci $((first-1)) ) + $(fibonacci $((second-2)) ) fi } echo $(fibonacci 2 0) I think i'm having trouble with the else statement. I get the error return: +: numeric argument required on line 14. The other problem that i'm having is that the script doesn't display any numbers even if i do echo $(fibonacci 0 2) . I thought it would display a 1 since i'm returning a 1 in that case. Can someone give me a couple of tips on how to accomplish this? After checking out some