How to convert from a for loop to a while loop

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I need to modify the set of codes below to a while loop

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James Tursa 2016-12-13

编辑：James Tursa 2016-12-13

Why do you need this converted? Is this homework? Why not get rid of the loop entirely and vectorize this operation?

Yuqing Zhu 2016-12-13

编辑：James Tursa 2016-12-13

在 MATLAB Online 中打开

I do like this from lecture note, but doesn't work well. Anything wrong happened?

Vector = [3 -3 2 -6 1 -9];
Index = 1;
while Index <= length(Vector);
    if(Vector(Index)<0);
        continue
    else
        Vector(Index) = Vector(Index) * 2;
    end
    Index=Index+1;
end
disp(Vector)

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Answer 1

James Tursa 2016-12-13

编辑：James Tursa 2016-12-13

0 个投票

Your loop doesn't work because the "continue" statement skips over the Index=Index+1 statement. You need to rewrite things without skipping over that statement ... e.g., maybe try to rewrite your if-then-else stuff so that you do not use a "continue" statement. (Hint: What happens to your logic if you simply comment out that "continue" statement?)