How to create a random Bernoulli matrix ?

2015 10 6
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更新时间：2022 6 4
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I want to create a 256x256 random Bernoulli matrix, how to do that in matlab ?

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Bilal Siddiqui
Bilal Siddiqui 2018-10-2
It's simple. A Bernoulli trial produces one of only two outcomes (say 0 or 1). You can use binord. For example p=0.2; n=256; A=binornd(1,p*ones(n));
produces an nxn array of Bernoulli trials which are either 0 or 1 in each outcome. Hope this answers your question.

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Robert Dylans
Robert Dylans 2015-10-7
编辑：Robert Dylans 2015-10-7

3 个投票

p=0.5; %probability of success
n=256;
A=rand(n);
A=(A<p)
or
p=0.5;
A=(rand(256)<p)

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Mohab Mostafa
Mohab Mostafa 2015-10-7
Thank you so much, another question (if it's fine with you), how to generate a random Gaussian matrix ? (also 256x256)
Robert Dylans
Robert Dylans 2015-10-7
A=normrnd(mean,standard dev,m,n);
For a cluster around a an average of '0' with sigma 1:
A=normrnd(0,1,256,256);
Mohab Mostafa
Mohab Mostafa 2015-10-7
and what if I want a -+1 Bernoulli matrix to be used in compressed sensing as a sensing matrix ?
Walter Roberson
Walter Roberson 2015-10-7
If you have a matrix A of 0 and 1 then you can make it a matrix of -1 and +1 by using
A*2 - 1

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Byron McMullen
Byron McMullen 2021-2-15

3 个投票

I use this.
bernoulli_matrix = randsrc(rows,cols,[-1,1]);
Bilal Siddiqui
Bilal Siddiqui 2018-10-2

1 个投票

It's simple. A Bernoulli trial produces one of only two outcomes (say 0 or 1). You can use binord. For example p=0.2; n=256; A=binornd(1,p*ones(n));
produces an 256x256 array of Bernoulli trials which are either 0 or 1 in each outcome. Hope this answers your question.

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