Trying to use a while loop to create experimental conditions?

Hello everyone,

I am ultra new to Matlab. I am trying to create a Psychology experiment that requires 6 different random combinations of "target present" and "target absent". Thus I am using 1's to represent "target present" and 2's to represent "target absent". I am trying to use the following code to execute the function "randi(2,20,1)" 6 times by using a while loop to fill in the matrix T (column by column). However, I cannot figure out how to get the code right. Any help would be appreciated.

Thanks so much,

T = [(zeros(20,1))]
ii=1
while ii < 6
        ii = ii+1
        T(ii,1) = randi(2,20,1)
end

Answer 1

[David Fletcher]

Is this what you are after?

ii=1
while ii <= 6
    T(ii,:) = randi(2,1,6);
    ii = ii+1;
end

T =

1 1 2 1 2 1

2 1 1 1 2 1

1 2 2 2 2 1

2 2 1 2 1 1

2 2 2 1 2 1

1 1 1 2 1 2

[Chris Keightley]

Yes, thank you so much!