How do I use numerical and logical indices to get this output?

Provide Matlab code that generates the following output. Given the vectors:

myArray = [2, 4, -3, 6, 9]

How do I use numerical indices and logical indices to get this:

myArray = [2, 4, 1, 6, 9]

Answer 1

[per isakson]

One out of many ways

%%
myArray = [2, 4, -3, 6, 9];
isneg = myArray < 0;
myArray( isneg ) = 1;

[Luming Tan]

Appreciate!! that's exactly what I am looking for!