Replacing n random zeros in a matrix with a specific nonzero value

Suppose I start with a zero matrix

X = zeros(100)

How can I replace n random zeros in matrix X with a single nonzero value (e.g., replace 10 zero elements in the matrix X with 1)?

Answer 1

[madhan ravi]

 X(randperm(numel(X), 10)) = 1

[Jerrold Tubay]

Thank you very much!