infinite series approximation program?

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Otto
Otto il 21 Ott 2012
Hi all,
I am a beginner in MATLAB. My problem is about writing an infinite series approximation to a function f(1/5),that stops when the stopping criterion is met. Stopping criterion is given as Es=(0.5x10^2-n).Program should automatically terminate when Ea<Es. Also displaying the results in tabulated form which 1'st column shows the number of the terms, 2'nd column lists corresponding approximation for f(1/5), 3'rd column shows the true value of f(1/5),4'th and 5'th columns indicate the corresponding values of Et and Ea respectively.
Function and the series are like that: f(x)=7x^3/1-x=∑ 7x^n where initial value of n=3 and n goes to infinity.
I thought about using while loop with Ea<Es criterion, but i couldn't succeed to run the m-file.
Thanks for any immediate help, I have very short time to write this code for a project.

Risposte (2)

Sachin Ganjare
Sachin Ganjare il 22 Ott 2012
  1 Commento
Otto
Otto il 22 Ott 2012
First of all, thanks for your interest. The problem is not exactly writing an infinite series approximation in MATLAB. Keypoint of this problem is writing a program which stops when the stopping criterion Ea<Es is met. I've done something using While loop for Ea<Es criterion but something went wrong. My Question is mainly about writing this commands by true order in MATLAB.Here is my worksheet;
x=0.2; Es=(0.5*10.^(2-n)); Ea=(x(i)-x(i-1)/x(i))*100; s=0 n=3:inf; i=1:inf; while abs(Ea)>Es; s=s+7*x^n end
I have tried something like this but went wrong.
I will appreciate for any help,
Thank you again.

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Korhan Babacan Yilmaz
Korhan Babacan Yilmaz il 13 Ott 2014
has anyone found the solution ?

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