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

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)

[Ameer Hamza]

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]

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.

Answer 1

[Sriram Tadavarty]

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)

This should do what you have asked for.

Regards,

Sriram

[Josh Williams]

worked wonders, thanks