MATLAB: Determine the first digit of each element of Fibonacci Sequence.

fibonacci sequence

Using your favorite programing language (Matlab) compute the first 1000 elements of the Fibonacci sequence f(n) =f(n−1) +f(n−2) where f(1) = f(2) = 1. Determine the first digit of each element .

Here, I can find the 1000 element easily using the Fibonacci function. But I am not sure how to the get the first digit of the fist 1000 element. Any suggestion will be appriciated. Thanks

Best Answer

str2double(cellfun(@(x)x(1),arrayfun(@(x)num2str(x),fibonacci(1:1000),'UniformOutput',false),'UniformOutput',false));

I think the above provides you with an array of the first digits of the fibonacci numbers up to 1000.

Related Solutions

MATLAB: Troubleshooting code for prompt and inputdlg

You need to convert ‘answer’ to a number:

N=str2double(answer);

That should work with your code.

MATLAB: Helped needed in Fibonacci Sequence code

Hello Cici. We can solve this by introducing another variable count into the function as shown below.

function[F_n, count] = Fibonacci(n, count)
    count = 1;
    
    if n == 2
        F_n = 1; 
    elseif n == 1
        F_n = 0;
    else
        [F_n_1, count_1] = Fibonacci(n-1);
        [F_n_2, count_2] = Fibonacci(n-2);
        F_n = F_n_1 + F_n_2;
        count = count + count_1 + count_2;
    end
end

Now your function returns both the

Fibonacci number as well as the number of times the function was called.

You may capture only the count in variable ans using this code snippet for the desired value of n.

[~, ans] = Fibonacci(n);

Hope this helps. :)

Best Answer

Related Solutions

MATLAB: Troubleshooting code for prompt and inputdlg

MATLAB: Helped needed in Fibonacci Sequence code

Related Question