How do i change values in an array of numbers based on their current value?

Lets assume we have an array and some variables.

I=[32 12; 44 9] 
T=30
I_T= I >30

We need to change the values of the elements of the array accordingly to T. For example, the first value is 32 which exceeds T. The value should be changed to 255. The second value is 12 which does not exceed T. Its value should be changed to 0. We need a function that does that for any given array length in the command window. Thanks in advance.

Answer 1

[the cyclist]

loIdx = (I <= T);
hiIdx = (I > T);

I(loIdx) = 0;
I(hiIdx) = 255;