# How to generate 0 and 1 matrix in specific condition.

15 visualizaciones (últimos 30 días)
Jenjen Ahmad Zaeni el 28 de Mayo de 2021
Hello everyone. I want to generate a random 4x5 matrix with the elements consist of 0 and 1. But, i don't want each column to have a total amount of 1 that is less than 2. So it's more like:
A =
0 1 1 1 0
1 1 1 1 1
1 1 1 0 1
0 0 1 0 1
I'm okay if there are 2, 3, or 4 total amount of '1' element, but i don't want even a single column to have only one '1' element, or zero at all. How to make it possible? Thank you very much.
##### 0 comentariosMostrar -1 comentarios más antiguosOcultar -1 comentarios más antiguos

Iniciar sesión para comentar.

Matt J el 29 de Mayo de 2021
Editada: Matt J el 29 de Mayo de 2021
Using the attached file sortlidx,
m=4; n=15;
A=[ones(1,n);randi([0,1],m-1,n)];
[~,idx]=sortlidx(rand(m,n),1);
A=A(idx)
A = 4×15
0 0 1 1 1 0 1 0 0 1 1 1 0 0 1 1 1 1 0 0 1 0 1 1 1 1 1 1 1 0 0 1 1 0 0 1 1 0 1 1 1 1 1 1 1 0 0 1 1 1 1 0 1 1 1 1 0 1 1 1
##### 1 comentarioMostrar NingunoOcultar Ninguno
Jenjen Ahmad Zaeni el 29 de Mayo de 2021
Very good. It can be used for many rows and columns quickly. Thank you very much!

Iniciar sesión para comentar.

### Más respuestas (1)

David Hill el 28 de Mayo de 2021
Brute force
a=randi(2,4,5)-1;
while any(sum(a)<2)
a=randi(2,4,5)-1;
end
##### 1 comentarioMostrar NingunoOcultar Ninguno
Jenjen Ahmad Zaeni el 28 de Mayo de 2021
Thank you, it works. But i wonder if i can do this to many more column? Lets say it's 50 and 100 column. Because when i tried to change the column to that amount, it keeps loading all the time.

Iniciar sesión para comentar.

### Categorías

Más información sobre Resizing and Reshaping Matrices en Help Center y File Exchange.

R2014b

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by