MATLAB Answers

Please help me convert equation to matlab code.

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adi putra
adi putra on 1 Apr 2018
Commented: Walter Roberson on 1 Apr 2018
Deal all.
I need you help to convert this equation to matlab code
I spend a lot of time to write it but it doesn't work. Thank you.

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Walter Roberson
Walter Roberson on 1 Apr 2018
Are you permitted to use the symbolic toolbox?
Is the question about providing some kind of symbolic proof, or is it about calculation of the formula using finite precision and a particular numeric input?

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Answers (2)

Birdman
Birdman on 1 Apr 2018
Edited: Birdman on 1 Apr 2018
Basically, Symbolic Toolbox will help you:
syms y(x) n
f(x)=symsum((-1).^n*(x.^(2*n+1))/factorial(2*n+1),n,0,Inf)

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Birdman
Birdman on 1 Apr 2018
Now that you have f(x)=sin(x), simply write
f(90)
but remember that sin function takes input arguments in radians, you need to write
f(pi/2)
to get a numerical result.

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Roger Stafford
Roger Stafford on 1 Apr 2018
N = 100; % <-- Choose some large number
s = x;
for n = 2*N-1:-2:1
s = x - s*x^2/((n+2)*(n+1));
end
(I think you meant to take the limit as N approaches infinity, not x.)

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