how to skip an iteration in a for-loop

Question

Lou 2015-8-27

0
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https://ww2.mathworks.cn/matlabcentral/answers/237097-how-to-skip-an-iteration-in-a-for-loop

回答： Walter Roberson 2015-8-28

Hi, i have a for-loop and at the end of each iteration I want to check if a certain condition holds, if so, the loop is supposed to skip the next iteration. I tried it the (for me) obvious way:

 for j=1:h
  ...do some interesting stuff...
if (z2>=f+tar(j+1)+1)
j=j+1;
end  
end

it sets j to j+1 when it's supposed to but that doesn't effect the main for-loop at all. Where is my mistake? I could probably use a while-loop instead but it's supposed to be a for-loop... Thank you

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Answer 1

the cyclist 2015-8-27

6
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https://ww2.mathworks.cn/matlabcentral/answers/237097-how-to-skip-an-iteration-in-a-for-loop#answer_190553

编辑：the cyclist 2015-8-27

Use the continue command.

If you want to break out of the loop entirely (based upon some condition), use the break command.

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Answer 2

Walter Roberson 2015-8-28

1
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https://ww2.mathworks.cn/matlabcentral/answers/237097-how-to-skip-an-iteration-in-a-for-loop#answer_190586

在 MATLAB Online 中打开

If you want to skip a future iteration then you will need to do something like

iterations_to_skip = 0;
for j=1:h
  if iterations_to_skip > 0
    iterations_to_skip = iterations_to_skip - 1;
    continue;
  end
  ....
  if (z2>=f+tar(j+1)+1)
    iterations_to_skip = 1;
  end
  ...
end