how would i get a while loop to repeat this code 26 times?

Question

Josh Williams 2020-3-15

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/510980-how-would-i-get-a-while-loop-to-repeat-this-code-26-times

评论： Josh Williams 2020-3-15

shiptext= [22 6;38 21;24 36;2 30;6 2;15 31;22 15;24 15;10 33;29 11;32 15;29 21;31 4;25 27;29 27;10 11;35 17;15 14;22 20;21 29;23 22;3 22;33 9;8 38;10 4;11 29]
shipnumber= size(shiptext,1)
disp(shipnumber)
plot(shiptext(:,1),shiptext(:,2),'.');
idr1=randi(26,1,1);
row1=shiptext(idr1,:);
idr2=randi(26,1,1);
row2=shiptext(idr2,:);
a=row2-row1
xdistance=a(1)
ydistance=a(2)
distance=sqrt(((xdistance)^2)+((ydistance)^2));
disp(distance)

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Ameer Hamza 2020-3-15

在 MATLAB Online 中打开

What do you want to repeat 26 times? You can repeat a piece of code 26 times using for loop.

for i=1:26
    % your code
end

Josh Williams 2020-3-15

I need the code to run 26 times to give me 26 answers for distance at the end (each time generating a different random matrix) however im only allowed to use while loops.

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Answer 1

Sriram Tadavarty 2020-3-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/510980-how-would-i-get-a-while-loop-to-repeat-this-code-26-times#answer_420232

在 MATLAB Online 中打开

Hi Josh,

You can do the following

i = 1; % loop index
while i <= 26
    shiptext= [22 6;38 21;24 36;2 30;6 2;15 31;22 15;24 15;10 33;29 11;32 15;29 21;31 4;25 27;29 27;10 11;35 17;15 14;22 20;21 29;23 22;3 22;33 9;8 38;10 4;11 29]
    shipnumber= size(shiptext,1)
    disp(shipnumber)
    plot(shiptext(:,1),shiptext(:,2),'.');
    idr1=randi(26,1,1);
    row1=shiptext(idr1,:);
    idr2=randi(26,1,1);
    row2=shiptext(idr2,:);
    a=row2-row1
    xdistance=a(1)
    ydistance=a(2)
    distance(i)=sqrt(((xdistance)^2)+((ydistance)^2)); % Stores distance for each loop index
    %disp(distance)
    
    i = i+1;
end
disp (distance)