Hi! I need help with how I put an input in this program!

Hi! I need help with this program (below).I need to put the n terms with an input, and I don't want that the graph behavior tends to infinity. Thanks a lot.

clear
clc

p = 0; % Start at 0
S = []; % Initiate array of approximations

i = 0;
while 1 == 1 % Infinite Loop
   p = p + (4*((-1)^i))/(2*i + 1); % The Leibniz formula for pi: http://en.wikipedia.org/wiki/Leibniz_formula_for_pi
   if rem(i,2) == 0 % Alternately set p1 and p2, then average them to find a better approximation
       p1 = p;
       S = [S p1]; % Append new value to array
       if i > 9
           plot(length(S)-10:length(S),S(length(S)-10:end))
           axis([length(S)-10 length(S) 2 4])
           pause(0.1)
       else
           plot(S)
           axis([1 10 2 4])
           pause(0.1)
       end
   else
       p2 = p;
       S = [S p2]; % Append new value to array
       if i > 9
           plot(length(S)-10:length(S),S(length(S)-10:end))
           axis([length(S)-10 length(S) 2 4])
           pause(0.1)
       else
           plot(S)
           axis([1 10 2 4])
           pause(0.1)
       end
   end
    i = i + 1;
end

[Image Analyst]

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

http://www.mathworks.com/matlabcentral/answers/13205#answer_18099

[Muhammad Usman Saleem]

format ur code plz. Sleeping i am

Answer 1

[Geoff Hayes]

Anthony - which n terms? Or do you only want the program to iterate for at most n times? If this is true, then just take your script and make it into a function that takes a single input: a maximum number of iterations. Something like

 function myFunc(n)

Your while loop then becomes

 while i < n

and your result S will have n elements. Since this is a function, make sure that you remove your call to clear.