I want to create a binary matrix with a variable dimensions

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Nir Vaishnav 2022-8-11

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评论： David Hill 2022-8-11

I want to create a binary matrix of dimension k x M where k and M are user defined.(k is the number of rows and M is the number of column). And number of zeros and ones in each row are user defined. Also this binary matrix should be a function.

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Dyuman Joshi 2022-8-11

Seems like home work/assignment.

Check out

Nir Vaishnav 2022-8-11

for kk=1:lnk

m = input('How many zeroes do you need \n');

n = input('how many ones do you need\n');

lnk=nchoosek(m+n,n);

i=n+m;

if i<=1

disp('size of binary sequence is out of range');

else

%Binary sequence contains m zeros and n ones in any order

x1=zeros(1,m);

x1(randn(i,n))=1

%count down the number of switches in such a Binary sequence x1;

end

This is what i have done but it creates only arrays i dont understand how to make it into a matrix. and then convert into a function

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Answer 1

David Hill 2022-8-11

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编辑：David Hill 2022-8-11

在 MATLAB Online 中打开

k=10;
M=50;
O=randi(M+1,k)-1;%number of ones per row (number of zeros per row= 50 - O)
for n=1:k
    m=[ones(1,O(n)),zeros(1,M-O(n))];
    Matrix(n,:)=m(randperm(M));
end

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Nir Vaishnav 2022-8-11

if i change the value of k,M then it shows the error that left side matrix dimension is not equal to right side.

David Hill 2022-8-11

在 MATLAB Online 中打开

You just need to clear Matrix or set Matrix = [ ] at the beginning.

k=10;
M=50;
Matrix=[];
O=randi(M+1,k)-1;%number of ones per row (number of zeros per row= 50 - O)
for n=1:k
    m=[ones(1,O(n)),zeros(1,M-O(n))];
    Matrix(n,:)=m(randperm(M));
end