How to add multiple conditions to While loop ?

Question

Ararat Cetinkaya 2020-3-7

0
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https://ww2.mathworks.cn/matlabcentral/answers/509565-how-to-add-multiple-conditions-to-while-loop

评论： Ararat Cetinkaya 2020-3-7

Hi everybody,

I want to work this While loop until all error values equal to 0, but code given below stop working when one of the error values equals to 0. How can I fix this problem?

aşağıdaki kodda error değeleri 0 olana dek while loopun çalışmasını istiyorum fakat error deperlerinden sadece biri tane 0 olduğunda loop duruyor

clc; clear all;
[num,txt,raw]    = xlsread('data-1.xlsx');
%%
r                        = randi (1500,3,1); %%Randomly selecting a inital cluster
ci1                      = [num(r(1,1),1) num(r(1,1),2)];  %% inital cluster centers
ci2                      = [num(r(2,1),1) num(r(2,1),2)];
ci3                      = [num(r(3,1),1) num(r(3,1),2)];
%%
error1                   = 10;
error2                   = 10;
error3                   = 10;
%%
while  error1 > 0 && error2 > 0 && error3 > 0
    
    for i=1:1:1500
        
        distance1            = sqrt(((ci1(1,1)-num(i,1))^2)+((ci1(1,2)-num(i,2))^2));
        distance2            = sqrt(((ci2(1,1)-num(i,1))^2)+((ci2(1,2)-num(i,2))^2));
        distance3            = sqrt(((ci3(1,1)-num(i,1))^2)+((ci3(1,2)-num(i,2))^2));
        decision             = [distance1(1,1),distance2(1,1),distance3(1,1)];
        [M,I]                = min(decision);
        indices(i)           = I;
    end
    %%
    data                = [num(:,1:2),indices'];
    class1              = data(data(:,3)==1,1:2);
    class2              = data(data(:,3)==2,1:2);
    class3              = data(data(:,3)==3,1:2);
    
    newcenter1          = [mean(class1(:,1)),mean(class1(:,2))];
    newcenter2          = [mean(class2(:,1)),mean(class2(:,2))];
    newcenter3          = [mean(class3(:,1)),mean(class3(:,2))];
    %%
    error1              = sqrt(((ci1(1,1)-newcenter1(1,1))^2)+((ci1(1,2)-newcenter1(1,2))^2));
    error2              = sqrt(((ci2(1,1)-newcenter2(1,1))^2)+((ci2(1,2)-newcenter2(1,2))^2));
    error3              = sqrt(((ci3(1,1)-newcenter3(1,1))^2)+((ci3(1,2)-newcenter3(1,2))^2));
    ci1                 = newcenter1;
    ci2                 = newcenter2;
    ci3                 = newcenter3;
    
end