can I escape the loop

I am tring to use the length function the I wrote to caculate the 3 side of a triangle.

array x represent the x coordinates of 3 vertices of a triangle

array y represent the y coordinates of 3 vertices of a triangle

what I did is trying to use a loop to use the first two number in each arrays, then the first and the last one, then the second and the last one. (just because I found the patterns of the next question which I need to use this function)

here is my code, for now it double caculated using the second and the last number, is it possible to escape the loop?

if you can think of a better method please advise as well.

Thank you in advance.

x=[1 4 1];
y=[1 6 10];

%Use the tri_side function to caculate the length of the first triangle

for i=1:length(x)-1
    
    %access the number in array to use in the function 
    x1=x(i);
    x2=x(i+1);
    y1=y(i);
    y2=y(i+1);
    
    %use the triSide function
    result=triSide(x1,x2,y1,y2);
    disp(result);
    
    
    %for the side of the last length 
    x1=x(i);
    y1=y(i);
    x2=x(length(x));
    y2=y(length(y));

    %use the triSide function
    result=triSide(x1,x2,y1,y2);
    disp(result);

    
end


%%function that I use to caculate the length 
function  result=triSide(x1,x2,y1,y2)
    
    
             %cacluate the length given the 2 coordinates 

             result=sqrt(((x1-x2)^2+(y1-y2))^2);
           

end

[Image Analyst]

Did you try typing control-c?

[Shiyun Li]

sorry I should make myself more clear, now I got 4,9, 5, 5 as the output now, the last two digiti is repeated. can I escape the loop to aviod the repetition? wanted answer 4,9,5

still thank you for you reply

Answer 1

[Image Analyst]

Index the result. So at the bottom of your loop:

result(i) = triSide(x1,x2,y1,y2);
if length(result) > length(unique(result))
    % There is a repeat.  Break out of the loop.
    break;  % The term is "break" rather then "escape".
end

Or if you wanted to check only the last two values for a repeat rather than check the entire vector:

result(i) = triSide(x1,x2,y1,y2);
if result(i) == result(i-1)
    % The last two values are the same.  Break out of the loop.
    break;  % The term is "break" rather then "escape".
end

[Shiyun Li]

thank you!!

can I ask what is the length(unique(result)) ?

[Image Analyst]

It give you just unique values, so

>> u = unique([4, 9, 5, 5])

u =

4 5 9

If all values are unique, then the vector and it's unique version will be the same length. If there is a repeat, then the unique version will be shorter.