Probability in random numbers!

How to create a random 2D array that each cell has different probabilities to be either 0 or 1 for example? In other words, how to t create a 2D array with each cell having a probability of 0.1 to be 1's and 0.9 probability to be 0's.

Answer 1

[Walter Roberson]

rand(m, n) <= 0.1

would be true (1) with probability 0.1

Answer 2

[Adam Danz]

Use randsrc()

randsrc(5,4,[[0,1];[.9,.1]])
% 5 x 4 array
% .9 prob. of 0
% .1 prob of 1

*Requires communications toolbox

[Adam Danz]

Here's a little test to see if the probabilities are roughly correct. Run this line lots of times and the values should all hover around 10% since there's a 10% probability of 1 and 90% propbability of 0.

mean(randsrc(10000000,1,[[0,1];[.9,.1]]))

[Mina Mansour]

It keeps on telling me I need a communications toolbox.

[Adam Danz]

Use Walter Roberson's answer if you don't have communications toolbox.