how to randomly delete number

Hi, i create a 1x3 matrix by using :

 M=[0 0 0];
m=round((3-1)*rand(1)+1);
M(m)=1;

and i want to know how i can randomly delete one of the 2 zeros. I thought about starting with

 for pos=find(M==0)
end

but i dont know what to do next. Im a beginner. Thanks

Answer 1

[Rik]

Your code looks like you want to randomly fill one location with a one, but it has a bias toward the middle. The code below does not.

M=zeros(1,3);
m=randi(numel(M));%pick a random integer between 1 and the number of elements in M
M(m)=1;

%generate the list of positions with a zero
ind_zero=1:numel(M);ind_zero(m)=[];
%randomly pick 1 element from that list
remove_ind=ind_zero(randperm(numel(ind_zero),1));
%remove the element
M(remove_ind)=[];

[Rik]

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