Creating a 15x15 matrix with certain specifications

Hello everyone,

I am having trouble constructing a 15x15 matrix with the following specifications:

- it should only contain three numbers (0, 1, 2)

- there should be 110 0s (48.89% are zeros)

- there should be 110 1s (48.89% are ones)

- there should be 5 2s (2.22% are twos)

Any hints and explanations are greatly appreciated

Answer 1

[Star Strider]

You didn’t say if you wanted it to be random or non-random.

I would create the initial vector as:

v = [zeros(1, 110)  ones(1, 110)  2*ones(1,5)];

then for a non-random matrix, just use the reshape function, and for a random matrix, use the randperm function first, then reshape.

[nick]

Thanks! I was looking for a random matrix, so randperm and reshape worked great!

[Star Strider]

My pleasure!