MATLAB: I have a 2 by 26 matrix, how do i randomly select one of the rows and extract them

matrix array

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]

Best Answer

idr = randi(26,1,1);
row = shiptext(idr,:)

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MATLAB: How would i get a while loop to repeat this code 26 times

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

MATLAB: Convert string to number or array

I'm guessing it's the space that is causing the problem. Run your array through

x = regexprep(x,' ','');

first to remove the spaces.

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MATLAB: How would i get a while loop to repeat this code 26 times

MATLAB: Convert string to number or array

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