How do i convert this for loop into a while loop?

Question

Ilker Enes Çirkin 2019-5-28

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https://ww2.mathworks.cn/matlabcentral/answers/464478-how-do-i-convert-this-for-loop-into-a-while-loop

评论： Ilker Enes Çirkin 2019-5-28

I just couldn't figure out how to convert it into a while loop. here is the code:

clc;
clear;
clear all;
n=input('Enter the number of elements in your array:'); % number of array elements
for i=1:n
    values(i)=input('Enter the values:')
    if values(i)<0
        values(i)=values(i)*(-1)
    end
end
for k=1:(n-1)
    d=k+1
    Xaverage(k)=(values(d)+values(k))/2
end
y=1:1:n;
plot(values,y)
hold on
z=1:1:(n-1);
plot(Xaverage,z)

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Ilker Enes Çirkin 2019-5-28

在 MATLAB Online 中打开

this is what i have tried so far:

clc;
clear;
clear all;
n=input('Enter the number of elements in your array:'); % number of array elements
i=1;
while i<n
    values(i)=input('Enter the values:');
    if values(i)<0
        values(i)=values(i)*(-1)
    end
end
k=1;
while k<(n-1)
    d=k+1
    Xaverage(k)=(values(d)+values(k))/2
end
y=1:1:n;
plot(values,y)
hold on
z=1:1:(n-1);
plot(Xaverage,z)

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Answer 1

James Tursa 2019-5-28

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/464478-how-do-i-convert-this-for-loop-into-a-while-loop#answer_376952

在 MATLAB Online 中打开

This for loop:

for i=1:n
    % stuff
end

is equivalent to this while loop:

i = 1;
while i <= n
    % stuff
    i = i + 1;
end

Your biggest problem is you never increment i or k in your while loops.

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Ilker Enes Çirkin 2019-5-28

yes ı noticed that after i shared this but after changing it i get the error saying Index exceeds the number of array elements (2).

James Tursa 2019-5-28

Please post your current code.

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Answer 2

Ilker Enes Çirkin 2019-5-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/464478-how-do-i-convert-this-for-loop-into-a-while-loop#answer_376956

在 MATLAB Online 中打开

This is my current code:

n=input('Enter the number of elements in your array:'); % number of array elements
i=1;
while i<=n
    i=i+1;
    values(i)=input('Enter the values:')
    if values(i)<0
        values(i)=values(i)*(-1)
    end
end
k=1;
while k<=(n-1)
    k=k+1;
    d=k+1
   Xaverage(k)=(values(d)+values(k))/2
end
y=1:1:n;
plot(values,y)
hold on
z=1:1:(n-1);
plot(Xaverage,z)

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James Tursa 2019-5-28

You did not copy the form of the while loop correctly. Incrementing the index variable is the LAST thing you do in the loop as I have written it. So your i=i+1 and k=k+1 lines need to be the LAST things you do in the loop, not the first.

Ilker Enes Çirkin 2019-5-28