Stop for loop if value is bigger than 10

Hi,

I want to add a while loop and start the for loop again if a value in dx > 10. So I have to stop the rest of the loop and startover for the next for loop.

Check my script where i want to add the while loop.

for i1 = 1:length(RCA);  
    fullfilename = fullfile(RCA(i1).folder, RCA(i1).name);
    thisData = readmatrix(fullfilename, 'Range', 2, 'Delimiter', ',');  
    sample_dist = thisData(:,1);
    step = (max(sample_dist)-min(sample_dist))/2499;
    a = min(sample_dist):step:max(sample_dist);
    XYZ = [thisData(:,7),thisData(:,8),thisData(:,9)];
    vq = interp1(sample_dist, XYZ, a);
    
    dx = vq(:,1) - vq(1,1);
    dy = vq(:,2) - vq(1,2);
    dz = vq(:,3) - vq(1,3);
    vq(1,1) = 0; 
    vq(1,2) = 0; 
    vq(1,3) = 0; 
    % here i want to check if any value in dx is bigger than 10. if yes
    % start the for loop again for the next set. If no continue this loop
    
    
    plot3(dx,dy,dz)
    legend(strcat(i1))
    hold on
afstand=[1:2500, i1];
lengte = size(dx);
lengte = round(lengte);
row = 0;

for i2 = 1:1:lengte-1
    row = row+1;
    P1 = [dx(i2), dy(i2), dz(i2)];    
    P2 = [dx(i2+1), dy(i2+1), dz(i2+1)];
    P(i2,1:3) = [dx(i2), dy(i2), dz(i2)];
    angleradian2(i2) = acos((P2(2)-P1(2)) / norm(P2-P1));
    distance(i2) = norm(P1 - P2);  
end
avgrad = mean(angleradian2,'all','omitnan')
for i2 = 1:250:lengte-250
    row = row+1;
    P1 = [dx(i2), dy(i2), dz(i2)];    
    P2 = [dx(i2+250), dy(i2+250), dz(i2+250)];
    P(i2,1:3) = [dx(i2), dy(i2), dz(i2)];
%     angleradian2(i2) = acos((P2(2)-P1(2)) / norm(P2-P1));
    angleradian3(row,i1) = acos((P2(2)-P1(2)) / norm(P2-P1));
    distance(i2) = norm(P1 - P2);  
end

angleradian2 = angleradian2(:,1);
afstand = afstand(:,1:2500);

 end

Answer 1

[Chien-Han Su]

I think what you need is the 'continue' command, try

    ...
    % here i want to check if any value in dx is bigger than 10. if yes
    % start the for loop again for the next set. If no continue this loop
    if dx > 10
        continue
    end
    
    plot3(dx,dy,dz)
    ...

or you can check https://www.mathworks.com/help/matlab/ref/continue.html for more information

[Dion Theunissen]

dx is not a value, its a list. So I have to check if any value in dx is > 10. How can i see that?

[Chien-Han Su]

Then just fix it as follows

...
% here i want to check if any value in dx is bigger than 10. if yes
% start the for loop again for the next set. If no continue this loop
if any(dx > 10)
    continue
end

plot3(dx,dy,dz)
...