Struggling with equation and FOR loops

Asked by Serena Solanki on 8 Nov 2017

Latest activity Commented on by Guillaume on 8 Nov 2017

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Hi I am trying to code this equation into MATLAB, I have tried using for loops but have had no success

The code is as follows:

r=[1 2 3 4 5]
Ai=0.6895
%Ai+r=N
N=[0.3256 0.2254 0.1300 0.07684]
%delta =(1/r)*log(Ai/N)]

I want to solve the equation delta and find delta values for each of the Ai/N values. So I would like to achieve 1/1*log(Ai/0.3256), 1/2*log(Ai/0.2254) etc

Hope you can help

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1 Answer

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Answer by Torsten on 8 Nov 2017

Edited by Torsten on 8 Nov 2017

Ai=0.6895;
r=[1 2 3 4 5];
N=[0.3256 0.2254 0.1300 0.07684];
for i=1:numel(r)
  for j = 1:numel(N)
    delta(i,j)=1/r(i)*log(Ai/N(j));
  end
end

Best wishes

Torsten.

2 Comments

Serena Solanki on 8 Nov 2017

Hi Torsten

Thank you very much for this- it has worked perfectly :)

Guillaume on 8 Nov 2017

Well, if that's the desired result, and if using matlab R2016b or later, simply:

delta = 1./r'.*log(Ai./N);

And if using matlab < R2016b:

delta = bsxfun(@times, 1./r', log(Ai./N));

No need for loops in any case.

You are now following this question

Serena Solanki (view profile)