Fibonacci with Neural Network

Hello Im new in this and I want to implement a neural network that given a number returns the fibbonaci number in that position. for example:

given 3 returns 2

or

given 6 returns 8

I tried to trained it giving an input = [1 2 3 4 5 6 ...] and a target = [1 1 2 3 5 8 ....] but there's a problem.

I hope you can help me :)

Answer 1

[Greg Heath]

A neural net is unnecessary::

F(n) = ( ( 1 + sqrt(5 ))/2 )^n - (( 1 - sqrt(5))/2 )^n ) / sqrt(5)

http://en.wikipedia.org/wiki/Fibonacci_number#Recognizing_Fibonacci_numbers

Thank you for formally accepting my answer.

Greg

Answer 2

[Pritesh Shah]

Hi, I think you have to use different NN Network.

Please understand that for the different op we have different Input.

That is reason for failing in ur case.

U can use Adaptive NN

Answer 3

[Greg Heath]

help narnet

doc narnet

Hope this helps.

Thank you for formally accepting my answer.

Greg

Answer 4

[Greg Heath]

http://www.mathworks.com/matlabcentral/answers/155488-prediction-using-narx-network