for loop not working

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Apoorva Maiya 2019-7-24

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评论： Apoorva Maiya 2019-7-25

here is the for loop that im trying to run. my problem is the variable PON is not getting updated and assigned inside the for loop. Can someone please help?

% the size of VAL is 3*1. M=3. the issue is the value of PON is showing 0.
[M,N]=size(VAL);
PON=0;
for i=1:M
   if(i>i+1)
       PON=VAL(i+1); % when i execute this line seperately it works fine but when the whole code is executed the value of PON is not updated.
   end
   disp(PON)
   break
end

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Matt J 2019-7-24

编辑：Matt J 2019-7-24

In what way is PON supposed to "update"? is it supposed to sum the values of "VAL" over the course of the loop?

Dennis 2019-7-24

What is the goal of your if statement? I doubt that (i>i+1) will ever be true.

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Answer 1

Matt J 2019-7-24

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The condition i>i+1 can never be true, so no wonder the line

PON=VAL(i+1);

is not executing. If it did execute, however, it would just over-write PON every time. Your code doesn't make it clear in what manner PON is supposed to "update" as new values of VAL are reached.